Electric field gradients and impurity distributions in doped noble metals : a systematic study
Autor(a) principal: | |
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Data de Publicação: | 1980 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/104009 |
Resumo: | The electric field gradients created at 111Cd nuclei by dilute transition-element impurities in noble metais are studied by the technique of time-differential perturbed angular correlation. The present results supplement previous ones with data for the alloys CuRh, CuPt, AgRh, Aglr, AuRh, AuPd, and AuPt, including temperature and concentration dependence in some typical cases. The results show conclusively that, for most impurities situated to the left of the host noble metais in the Periodic Table, there is a strong attraction between the probe In and the impurity atoms. The binding energy ∆E8 for the probe-impurity system is measured for the Cu R h and Cu Pt alloys. The temperature dependence o f the high-frequency quadrupole interaction vh due to a single-impurity nearest neighbor to the probe is found to obey the usual empiricallaw v( T) = v(O) ( 1-α T3/2 ). The wealth o f experimental data thus made available allows a systematic examination of the results from which the following facts emerge: (i) The observed high frequency v h is related to the nominal valence difference ∆Z between impurity and host and to a parameter ʎ, the difference in the period of impurity and host in the Periodic Table; (ii) a correlation of ∆E8 with both ∆Z and ʎ is apparent; and (iii) an in verse correlation between the a parameter and ∆E8 is apparent. |
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Baumvol, Israel Jacob RabinBehar, MoniJornada, Joao Alziro Herz daLivi, Rogerio PohlmannLodge, Kenneth WilliamZawislak, Fernando ClaudioLopez Garcia, A.2014-10-01T02:10:23Z19800163-1829http://hdl.handle.net/10183/104009000143926The electric field gradients created at 111Cd nuclei by dilute transition-element impurities in noble metais are studied by the technique of time-differential perturbed angular correlation. The present results supplement previous ones with data for the alloys CuRh, CuPt, AgRh, Aglr, AuRh, AuPd, and AuPt, including temperature and concentration dependence in some typical cases. The results show conclusively that, for most impurities situated to the left of the host noble metais in the Periodic Table, there is a strong attraction between the probe In and the impurity atoms. The binding energy ∆E8 for the probe-impurity system is measured for the Cu R h and Cu Pt alloys. The temperature dependence o f the high-frequency quadrupole interaction vh due to a single-impurity nearest neighbor to the probe is found to obey the usual empiricallaw v( T) = v(O) ( 1-α T3/2 ). The wealth o f experimental data thus made available allows a systematic examination of the results from which the following facts emerge: (i) The observed high frequency v h is related to the nominal valence difference ∆Z between impurity and host and to a parameter ʎ, the difference in the period of impurity and host in the Periodic Table; (ii) a correlation of ∆E8 with both ∆Z and ʎ is apparent; and (iii) an in verse correlation between the a parameter and ∆E8 is apparent.application/pdfengPhysical review. B, Condensed matter. New York. Vol. 22, n. 11 (Dec. 1980), p. 5115-5127Física da matéria condensadaImpurezasElectric field gradients and impurity distributions in doped noble metals : a systematic studyEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000143926.pdf000143926.pdfTexto completo (inglês)application/pdf1276175http://www.lume.ufrgs.br/bitstream/10183/104009/1/000143926.pdfad99d915991e3f678fda2008275bc337MD51TEXT000143926.pdf.txt000143926.pdf.txtExtracted Texttext/plain41672http://www.lume.ufrgs.br/bitstream/10183/104009/2/000143926.pdf.txtacd966033564ee0960cfe687af9607b8MD52THUMBNAIL000143926.pdf.jpg000143926.pdf.jpgGenerated Thumbnailimage/jpeg1783http://www.lume.ufrgs.br/bitstream/10183/104009/3/000143926.pdf.jpg26bb992c514e7bc0f349842e13b3ad66MD5310183/1040092018-10-08 08:43:57.318oai:www.lume.ufrgs.br:10183/104009Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-08T11:43:57Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Electric field gradients and impurity distributions in doped noble metals : a systematic study |
title |
Electric field gradients and impurity distributions in doped noble metals : a systematic study |
spellingShingle |
Electric field gradients and impurity distributions in doped noble metals : a systematic study Baumvol, Israel Jacob Rabin Física da matéria condensada Impurezas |
title_short |
Electric field gradients and impurity distributions in doped noble metals : a systematic study |
title_full |
Electric field gradients and impurity distributions in doped noble metals : a systematic study |
title_fullStr |
Electric field gradients and impurity distributions in doped noble metals : a systematic study |
title_full_unstemmed |
Electric field gradients and impurity distributions in doped noble metals : a systematic study |
title_sort |
Electric field gradients and impurity distributions in doped noble metals : a systematic study |
author |
Baumvol, Israel Jacob Rabin |
author_facet |
Baumvol, Israel Jacob Rabin Behar, Moni Jornada, Joao Alziro Herz da Livi, Rogerio Pohlmann Lodge, Kenneth William Zawislak, Fernando Claudio Lopez Garcia, A. |
author_role |
author |
author2 |
Behar, Moni Jornada, Joao Alziro Herz da Livi, Rogerio Pohlmann Lodge, Kenneth William Zawislak, Fernando Claudio Lopez Garcia, A. |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Baumvol, Israel Jacob Rabin Behar, Moni Jornada, Joao Alziro Herz da Livi, Rogerio Pohlmann Lodge, Kenneth William Zawislak, Fernando Claudio Lopez Garcia, A. |
dc.subject.por.fl_str_mv |
Física da matéria condensada Impurezas |
topic |
Física da matéria condensada Impurezas |
description |
The electric field gradients created at 111Cd nuclei by dilute transition-element impurities in noble metais are studied by the technique of time-differential perturbed angular correlation. The present results supplement previous ones with data for the alloys CuRh, CuPt, AgRh, Aglr, AuRh, AuPd, and AuPt, including temperature and concentration dependence in some typical cases. The results show conclusively that, for most impurities situated to the left of the host noble metais in the Periodic Table, there is a strong attraction between the probe In and the impurity atoms. The binding energy ∆E8 for the probe-impurity system is measured for the Cu R h and Cu Pt alloys. The temperature dependence o f the high-frequency quadrupole interaction vh due to a single-impurity nearest neighbor to the probe is found to obey the usual empiricallaw v( T) = v(O) ( 1-α T3/2 ). The wealth o f experimental data thus made available allows a systematic examination of the results from which the following facts emerge: (i) The observed high frequency v h is related to the nominal valence difference ∆Z between impurity and host and to a parameter ʎ, the difference in the period of impurity and host in the Periodic Table; (ii) a correlation of ∆E8 with both ∆Z and ʎ is apparent; and (iii) an in verse correlation between the a parameter and ∆E8 is apparent. |
publishDate |
1980 |
dc.date.issued.fl_str_mv |
1980 |
dc.date.accessioned.fl_str_mv |
2014-10-01T02:10:23Z |
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Estrangeiro info:eu-repo/semantics/article |
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http://hdl.handle.net/10183/104009 |
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0163-1829 |
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000143926 |
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http://hdl.handle.net/10183/104009 |
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eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physical review. B, Condensed matter. New York. Vol. 22, n. 11 (Dec. 1980), p. 5115-5127 |
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openAccess |
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