Nuclear magnetic resonance in liquid gold-cobalt alloys
A Co59 NMR investigation of liquid gold-cobalt alloys has been carried out over the complete composition range. At all compositions, the NMR properties are dominated by orbital effects. The orbital susceptibility increases from 8% of the total susceptibility (at 1700 K) for pure cobalt to about 40%...
Ausführliche Beschreibung
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E-Artikel |
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| Erschienen: |
1979 |
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Online-Ressource 7 |
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APS Digital Backfile Archive 1893-2003 |
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Enthalten in: Physical review / B - College Park, Md. : APS, 1970, 20(1979), 1, Seite 46-52 |
| Übergeordnetes Werk: |
volume:20 ; year:1979 ; number:1 ; pages:46-52 ; extent:7 |
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| 520 | |a A Co59 NMR investigation of liquid gold-cobalt alloys has been carried out over the complete composition range. At all compositions, the NMR properties are dominated by orbital effects. The orbital susceptibility increases from 8% of the total susceptibility (at 1700 K) for pure cobalt to about 40% for the dilute alloys. The values for the d-spin hyperfine field and the moment lifetime deduced from the data show that the magnetic character of a cobalt atom changes markedly on adding 25 at.% gold to pure cobalt and that the properties at this composition are closer to those of the dilute alloys than of pure cobalt. The d-spin hyperfine field decreases by more than a factor of 3 for a 75 at.% cobalt alloy with a small decrease on adding further gold. The nuclear relaxation rates are determined by the fluctuating orbital susceptibility. Calculation of the composition dependence of the rate using an interacting impurity model yields excellent agreement with experiment over the full composition range with the exception of pure cobalt. In this model, the local-moment lifetime is independent of concentration, and the fluctuation time for the local hyperfine field is shortened by exchange coupling between the cobalt atoms. For pure cobalt, we deduce that the moment lifetime is reduced by a factor of 2 to about 5 × 10-15 sec. | ||
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(DE-627)NLEJ24958493X (DE-601)aps:469e0ae68839469e208274132bb846917ade3fd8 DE-627 ger DE-627 rakwb Nuclear magnetic resonance in liquid gold-cobalt alloys 1979 Online-Ressource 7 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A Co59 NMR investigation of liquid gold-cobalt alloys has been carried out over the complete composition range. At all compositions, the NMR properties are dominated by orbital effects. The orbital susceptibility increases from 8% of the total susceptibility (at 1700 K) for pure cobalt to about 40% for the dilute alloys. The values for the d-spin hyperfine field and the moment lifetime deduced from the data show that the magnetic character of a cobalt atom changes markedly on adding 25 at.% gold to pure cobalt and that the properties at this composition are closer to those of the dilute alloys than of pure cobalt. The d-spin hyperfine field decreases by more than a factor of 3 for a 75 at.% cobalt alloy with a small decrease on adding further gold. The nuclear relaxation rates are determined by the fluctuating orbital susceptibility. Calculation of the composition dependence of the rate using an interacting impurity model yields excellent agreement with experiment over the full composition range with the exception of pure cobalt. In this model, the local-moment lifetime is independent of concentration, and the fluctuation time for the local hyperfine field is shortened by exchange coupling between the cobalt atoms. For pure cobalt, we deduce that the moment lifetime is reduced by a factor of 2 to about 5 × 10-15 sec. APS Digital Backfile Archive 1893-2003 Dupree, R. oth Enthalten in Physical review / B College Park, Md. : APS, 1970 20(1979), 1, Seite 46-52 Online-Ressource (DE-627)NLEJ248237845 (DE-600)1473011-X 1550-235X nnns volume:20 year:1979 number:1 pages:46-52 extent:7 https://www.tib.eu/de/suchen/id/aps%3A469e0ae68839469e208274132bb846917ade3fd8 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 20 1979 1 46-52 7 |
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(DE-627)NLEJ24958493X (DE-601)aps:469e0ae68839469e208274132bb846917ade3fd8 DE-627 ger DE-627 rakwb Nuclear magnetic resonance in liquid gold-cobalt alloys 1979 Online-Ressource 7 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A Co59 NMR investigation of liquid gold-cobalt alloys has been carried out over the complete composition range. At all compositions, the NMR properties are dominated by orbital effects. The orbital susceptibility increases from 8% of the total susceptibility (at 1700 K) for pure cobalt to about 40% for the dilute alloys. The values for the d-spin hyperfine field and the moment lifetime deduced from the data show that the magnetic character of a cobalt atom changes markedly on adding 25 at.% gold to pure cobalt and that the properties at this composition are closer to those of the dilute alloys than of pure cobalt. The d-spin hyperfine field decreases by more than a factor of 3 for a 75 at.% cobalt alloy with a small decrease on adding further gold. The nuclear relaxation rates are determined by the fluctuating orbital susceptibility. Calculation of the composition dependence of the rate using an interacting impurity model yields excellent agreement with experiment over the full composition range with the exception of pure cobalt. In this model, the local-moment lifetime is independent of concentration, and the fluctuation time for the local hyperfine field is shortened by exchange coupling between the cobalt atoms. For pure cobalt, we deduce that the moment lifetime is reduced by a factor of 2 to about 5 × 10-15 sec. APS Digital Backfile Archive 1893-2003 Dupree, R. oth Enthalten in Physical review / B College Park, Md. : APS, 1970 20(1979), 1, Seite 46-52 Online-Ressource (DE-627)NLEJ248237845 (DE-600)1473011-X 1550-235X nnns volume:20 year:1979 number:1 pages:46-52 extent:7 https://www.tib.eu/de/suchen/id/aps%3A469e0ae68839469e208274132bb846917ade3fd8 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 20 1979 1 46-52 7 |
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(DE-627)NLEJ24958493X (DE-601)aps:469e0ae68839469e208274132bb846917ade3fd8 DE-627 ger DE-627 rakwb Nuclear magnetic resonance in liquid gold-cobalt alloys 1979 Online-Ressource 7 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A Co59 NMR investigation of liquid gold-cobalt alloys has been carried out over the complete composition range. At all compositions, the NMR properties are dominated by orbital effects. The orbital susceptibility increases from 8% of the total susceptibility (at 1700 K) for pure cobalt to about 40% for the dilute alloys. The values for the d-spin hyperfine field and the moment lifetime deduced from the data show that the magnetic character of a cobalt atom changes markedly on adding 25 at.% gold to pure cobalt and that the properties at this composition are closer to those of the dilute alloys than of pure cobalt. The d-spin hyperfine field decreases by more than a factor of 3 for a 75 at.% cobalt alloy with a small decrease on adding further gold. The nuclear relaxation rates are determined by the fluctuating orbital susceptibility. Calculation of the composition dependence of the rate using an interacting impurity model yields excellent agreement with experiment over the full composition range with the exception of pure cobalt. In this model, the local-moment lifetime is independent of concentration, and the fluctuation time for the local hyperfine field is shortened by exchange coupling between the cobalt atoms. For pure cobalt, we deduce that the moment lifetime is reduced by a factor of 2 to about 5 × 10-15 sec. APS Digital Backfile Archive 1893-2003 Dupree, R. oth Enthalten in Physical review / B College Park, Md. : APS, 1970 20(1979), 1, Seite 46-52 Online-Ressource (DE-627)NLEJ248237845 (DE-600)1473011-X 1550-235X nnns volume:20 year:1979 number:1 pages:46-52 extent:7 https://www.tib.eu/de/suchen/id/aps%3A469e0ae68839469e208274132bb846917ade3fd8 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 20 1979 1 46-52 7 |
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(DE-627)NLEJ24958493X (DE-601)aps:469e0ae68839469e208274132bb846917ade3fd8 DE-627 ger DE-627 rakwb Nuclear magnetic resonance in liquid gold-cobalt alloys 1979 Online-Ressource 7 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A Co59 NMR investigation of liquid gold-cobalt alloys has been carried out over the complete composition range. At all compositions, the NMR properties are dominated by orbital effects. The orbital susceptibility increases from 8% of the total susceptibility (at 1700 K) for pure cobalt to about 40% for the dilute alloys. The values for the d-spin hyperfine field and the moment lifetime deduced from the data show that the magnetic character of a cobalt atom changes markedly on adding 25 at.% gold to pure cobalt and that the properties at this composition are closer to those of the dilute alloys than of pure cobalt. The d-spin hyperfine field decreases by more than a factor of 3 for a 75 at.% cobalt alloy with a small decrease on adding further gold. The nuclear relaxation rates are determined by the fluctuating orbital susceptibility. Calculation of the composition dependence of the rate using an interacting impurity model yields excellent agreement with experiment over the full composition range with the exception of pure cobalt. In this model, the local-moment lifetime is independent of concentration, and the fluctuation time for the local hyperfine field is shortened by exchange coupling between the cobalt atoms. For pure cobalt, we deduce that the moment lifetime is reduced by a factor of 2 to about 5 × 10-15 sec. APS Digital Backfile Archive 1893-2003 Dupree, R. oth Enthalten in Physical review / B College Park, Md. : APS, 1970 20(1979), 1, Seite 46-52 Online-Ressource (DE-627)NLEJ248237845 (DE-600)1473011-X 1550-235X nnns volume:20 year:1979 number:1 pages:46-52 extent:7 https://www.tib.eu/de/suchen/id/aps%3A469e0ae68839469e208274132bb846917ade3fd8 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 20 1979 1 46-52 7 |
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(DE-627)NLEJ24958493X (DE-601)aps:469e0ae68839469e208274132bb846917ade3fd8 DE-627 ger DE-627 rakwb Nuclear magnetic resonance in liquid gold-cobalt alloys 1979 Online-Ressource 7 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A Co59 NMR investigation of liquid gold-cobalt alloys has been carried out over the complete composition range. At all compositions, the NMR properties are dominated by orbital effects. The orbital susceptibility increases from 8% of the total susceptibility (at 1700 K) for pure cobalt to about 40% for the dilute alloys. The values for the d-spin hyperfine field and the moment lifetime deduced from the data show that the magnetic character of a cobalt atom changes markedly on adding 25 at.% gold to pure cobalt and that the properties at this composition are closer to those of the dilute alloys than of pure cobalt. The d-spin hyperfine field decreases by more than a factor of 3 for a 75 at.% cobalt alloy with a small decrease on adding further gold. The nuclear relaxation rates are determined by the fluctuating orbital susceptibility. Calculation of the composition dependence of the rate using an interacting impurity model yields excellent agreement with experiment over the full composition range with the exception of pure cobalt. In this model, the local-moment lifetime is independent of concentration, and the fluctuation time for the local hyperfine field is shortened by exchange coupling between the cobalt atoms. For pure cobalt, we deduce that the moment lifetime is reduced by a factor of 2 to about 5 × 10-15 sec. APS Digital Backfile Archive 1893-2003 Dupree, R. oth Enthalten in Physical review / B College Park, Md. : APS, 1970 20(1979), 1, Seite 46-52 Online-Ressource (DE-627)NLEJ248237845 (DE-600)1473011-X 1550-235X nnns volume:20 year:1979 number:1 pages:46-52 extent:7 https://www.tib.eu/de/suchen/id/aps%3A469e0ae68839469e208274132bb846917ade3fd8 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 20 1979 1 46-52 7 |
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Nuclear magnetic resonance in liquid gold-cobalt alloys |
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A Co59 NMR investigation of liquid gold-cobalt alloys has been carried out over the complete composition range. At all compositions, the NMR properties are dominated by orbital effects. The orbital susceptibility increases from 8% of the total susceptibility (at 1700 K) for pure cobalt to about 40% for the dilute alloys. The values for the d-spin hyperfine field and the moment lifetime deduced from the data show that the magnetic character of a cobalt atom changes markedly on adding 25 at.% gold to pure cobalt and that the properties at this composition are closer to those of the dilute alloys than of pure cobalt. The d-spin hyperfine field decreases by more than a factor of 3 for a 75 at.% cobalt alloy with a small decrease on adding further gold. The nuclear relaxation rates are determined by the fluctuating orbital susceptibility. Calculation of the composition dependence of the rate using an interacting impurity model yields excellent agreement with experiment over the full composition range with the exception of pure cobalt. In this model, the local-moment lifetime is independent of concentration, and the fluctuation time for the local hyperfine field is shortened by exchange coupling between the cobalt atoms. For pure cobalt, we deduce that the moment lifetime is reduced by a factor of 2 to about 5 × 10-15 sec. |
| abstractGer |
A Co59 NMR investigation of liquid gold-cobalt alloys has been carried out over the complete composition range. At all compositions, the NMR properties are dominated by orbital effects. The orbital susceptibility increases from 8% of the total susceptibility (at 1700 K) for pure cobalt to about 40% for the dilute alloys. The values for the d-spin hyperfine field and the moment lifetime deduced from the data show that the magnetic character of a cobalt atom changes markedly on adding 25 at.% gold to pure cobalt and that the properties at this composition are closer to those of the dilute alloys than of pure cobalt. The d-spin hyperfine field decreases by more than a factor of 3 for a 75 at.% cobalt alloy with a small decrease on adding further gold. The nuclear relaxation rates are determined by the fluctuating orbital susceptibility. Calculation of the composition dependence of the rate using an interacting impurity model yields excellent agreement with experiment over the full composition range with the exception of pure cobalt. In this model, the local-moment lifetime is independent of concentration, and the fluctuation time for the local hyperfine field is shortened by exchange coupling between the cobalt atoms. For pure cobalt, we deduce that the moment lifetime is reduced by a factor of 2 to about 5 × 10-15 sec. |
| abstract_unstemmed |
A Co59 NMR investigation of liquid gold-cobalt alloys has been carried out over the complete composition range. At all compositions, the NMR properties are dominated by orbital effects. The orbital susceptibility increases from 8% of the total susceptibility (at 1700 K) for pure cobalt to about 40% for the dilute alloys. The values for the d-spin hyperfine field and the moment lifetime deduced from the data show that the magnetic character of a cobalt atom changes markedly on adding 25 at.% gold to pure cobalt and that the properties at this composition are closer to those of the dilute alloys than of pure cobalt. The d-spin hyperfine field decreases by more than a factor of 3 for a 75 at.% cobalt alloy with a small decrease on adding further gold. The nuclear relaxation rates are determined by the fluctuating orbital susceptibility. Calculation of the composition dependence of the rate using an interacting impurity model yields excellent agreement with experiment over the full composition range with the exception of pure cobalt. In this model, the local-moment lifetime is independent of concentration, and the fluctuation time for the local hyperfine field is shortened by exchange coupling between the cobalt atoms. For pure cobalt, we deduce that the moment lifetime is reduced by a factor of 2 to about 5 × 10-15 sec. |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000naa a22002652 4500</leader><controlfield tag="001">NLEJ24958493X</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20231114102238.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">231114s1979 xx |||||o 00| ||und c</controlfield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)NLEJ24958493X</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-601)aps:469e0ae68839469e208274132bb846917ade3fd8</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Nuclear magnetic resonance in liquid gold-cobalt alloys</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1979</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">7</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">A Co59 NMR investigation of liquid gold-cobalt alloys has been carried out over the complete composition range. At all compositions, the NMR properties are dominated by orbital effects. The orbital susceptibility increases from 8% of the total susceptibility (at 1700 K) for pure cobalt to about 40% for the dilute alloys. The values for the d-spin hyperfine field and the moment lifetime deduced from the data show that the magnetic character of a cobalt atom changes markedly on adding 25 at.% gold to pure cobalt and that the properties at this composition are closer to those of the dilute alloys than of pure cobalt. The d-spin hyperfine field decreases by more than a factor of 3 for a 75 at.% cobalt alloy with a small decrease on adding further gold. The nuclear relaxation rates are determined by the fluctuating orbital susceptibility. Calculation of the composition dependence of the rate using an interacting impurity model yields excellent agreement with experiment over the full composition range with the exception of pure cobalt. In this model, the local-moment lifetime is independent of concentration, and the fluctuation time for the local hyperfine field is shortened by exchange coupling between the cobalt atoms. For pure cobalt, we deduce that the moment lifetime is reduced by a factor of 2 to about 5 × 10-15 sec.</subfield></datafield><datafield tag="533" ind1=" " ind2=" "><subfield code="f">APS Digital Backfile Archive 1893-2003</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Dupree, R.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Physical review / B</subfield><subfield code="d">College Park, Md. : APS, 1970</subfield><subfield code="g">20(1979), 1, Seite 46-52</subfield><subfield code="h">Online-Ressource</subfield><subfield code="w">(DE-627)NLEJ248237845</subfield><subfield code="w">(DE-600)1473011-X</subfield><subfield code="x">1550-235X</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:20</subfield><subfield code="g">year:1979</subfield><subfield code="g">number:1</subfield><subfield code="g">pages:46-52</subfield><subfield code="g">extent:7</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://www.tib.eu/de/suchen/id/aps%3A469e0ae68839469e208274132bb846917ade3fd8</subfield><subfield code="x">Verlag</subfield><subfield code="z">Deutschlandweit zugänglich</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-1-APS</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_NL_ARTICLE</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">20</subfield><subfield code="j">1979</subfield><subfield code="e">1</subfield><subfield code="h">46-52</subfield><subfield code="g">7</subfield></datafield></record></collection>
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