Bicriticality in Fe/sub x/Co/sub 1-x/Ta/sub 2/O/sub 6/
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/99391 |
Resumo: | X-ray and neutron-diffraction, dc magnetic susceptibility, magnetization, and specific-heat measurements are reported for FexCo1 xTa2O6 mixed oxides. X-ray refinement indicates homogeneous samples for all the reported concentrations. The neutron-diffraction measurements reveal magnetic structures with double propagation vectors (±1/4; 1/4; 1/4) for CoTa2O6, and (1/2; 0; 1/2) and (0; 1/2; 1/2) for FeTa2O6. The latter remain unchanged in the Fe-rich samples, for 0:46 ≤x<1.00, while the Co-rich samples show propagation vectors (±1/4; 1/4; 0)for 0.09 ≤ x<0:46. The temperature vs x phase diagram exhibits a bicritical point at about T=4.9 K and x=0.46. For this concentration, and at low temperatures, the system shows coexistence of both magnetic structures. This novel bicritical behavior is interpreted as induced by competition between the different magnetic and crystallographic structures. |
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Kinast, Eder JulioAntonietti, VolmirSchmitt, DenysIsnard, OlivierCunha, Joao Batista Marimon daGusmao, Miguel Angelo CavalheiroSantos, Carlos Alberto dos2014-08-09T02:11:26Z20030031-9007http://hdl.handle.net/10183/99391000392390X-ray and neutron-diffraction, dc magnetic susceptibility, magnetization, and specific-heat measurements are reported for FexCo1 xTa2O6 mixed oxides. X-ray refinement indicates homogeneous samples for all the reported concentrations. The neutron-diffraction measurements reveal magnetic structures with double propagation vectors (±1/4; 1/4; 1/4) for CoTa2O6, and (1/2; 0; 1/2) and (0; 1/2; 1/2) for FeTa2O6. The latter remain unchanged in the Fe-rich samples, for 0:46 ≤x<1.00, while the Co-rich samples show propagation vectors (±1/4; 1/4; 0)for 0.09 ≤ x<0:46. The temperature vs x phase diagram exhibits a bicritical point at about T=4.9 K and x=0.46. For this concentration, and at low temperatures, the system shows coexistence of both magnetic structures. This novel bicritical behavior is interpreted as induced by competition between the different magnetic and crystallographic structures.application/pdfengPhysical review letters. Melville. Vol. 91, no. 19 (Nov. 2003), 197208 4p.Distribuição GaussianaTeoria de redesBicriticality in Fe/sub x/Co/sub 1-x/Ta/sub 2/O/sub 6/Estrangeiroinfo: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:UFRGSORIGINAL000392390.pdf000392390.pdfTexto completo (inglês)application/pdf162733http://www.lume.ufrgs.br/bitstream/10183/99391/1/000392390.pdfe549aced28024f27edeb3b3e7c913508MD51TEXT000392390.pdf.txt000392390.pdf.txtExtracted Texttext/plain19329http://www.lume.ufrgs.br/bitstream/10183/99391/2/000392390.pdf.txt19482489c05e5e384c41ef0fad3248f6MD52THUMBNAIL000392390.pdf.jpg000392390.pdf.jpgGenerated Thumbnailimage/jpeg2141http://www.lume.ufrgs.br/bitstream/10183/99391/3/000392390.pdf.jpgf1d9f3f5f5a9b67339364136d8164039MD5310183/993912018-10-22 08:34:07.705oai:www.lume.ufrgs.br:10183/99391Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-22T11:34:07Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Bicriticality in Fe/sub x/Co/sub 1-x/Ta/sub 2/O/sub 6/ |
title |
Bicriticality in Fe/sub x/Co/sub 1-x/Ta/sub 2/O/sub 6/ |
spellingShingle |
Bicriticality in Fe/sub x/Co/sub 1-x/Ta/sub 2/O/sub 6/ Kinast, Eder Julio Distribuição Gaussiana Teoria de redes |
title_short |
Bicriticality in Fe/sub x/Co/sub 1-x/Ta/sub 2/O/sub 6/ |
title_full |
Bicriticality in Fe/sub x/Co/sub 1-x/Ta/sub 2/O/sub 6/ |
title_fullStr |
Bicriticality in Fe/sub x/Co/sub 1-x/Ta/sub 2/O/sub 6/ |
title_full_unstemmed |
Bicriticality in Fe/sub x/Co/sub 1-x/Ta/sub 2/O/sub 6/ |
title_sort |
Bicriticality in Fe/sub x/Co/sub 1-x/Ta/sub 2/O/sub 6/ |
author |
Kinast, Eder Julio |
author_facet |
Kinast, Eder Julio Antonietti, Volmir Schmitt, Denys Isnard, Olivier Cunha, Joao Batista Marimon da Gusmao, Miguel Angelo Cavalheiro Santos, Carlos Alberto dos |
author_role |
author |
author2 |
Antonietti, Volmir Schmitt, Denys Isnard, Olivier Cunha, Joao Batista Marimon da Gusmao, Miguel Angelo Cavalheiro Santos, Carlos Alberto dos |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Kinast, Eder Julio Antonietti, Volmir Schmitt, Denys Isnard, Olivier Cunha, Joao Batista Marimon da Gusmao, Miguel Angelo Cavalheiro Santos, Carlos Alberto dos |
dc.subject.por.fl_str_mv |
Distribuição Gaussiana Teoria de redes |
topic |
Distribuição Gaussiana Teoria de redes |
description |
X-ray and neutron-diffraction, dc magnetic susceptibility, magnetization, and specific-heat measurements are reported for FexCo1 xTa2O6 mixed oxides. X-ray refinement indicates homogeneous samples for all the reported concentrations. The neutron-diffraction measurements reveal magnetic structures with double propagation vectors (±1/4; 1/4; 1/4) for CoTa2O6, and (1/2; 0; 1/2) and (0; 1/2; 1/2) for FeTa2O6. The latter remain unchanged in the Fe-rich samples, for 0:46 ≤x<1.00, while the Co-rich samples show propagation vectors (±1/4; 1/4; 0)for 0.09 ≤ x<0:46. The temperature vs x phase diagram exhibits a bicritical point at about T=4.9 K and x=0.46. For this concentration, and at low temperatures, the system shows coexistence of both magnetic structures. This novel bicritical behavior is interpreted as induced by competition between the different magnetic and crystallographic structures. |
publishDate |
2003 |
dc.date.issued.fl_str_mv |
2003 |
dc.date.accessioned.fl_str_mv |
2014-08-09T02:11:26Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
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publishedVersion |
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http://hdl.handle.net/10183/99391 |
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0031-9007 |
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000392390 |
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http://hdl.handle.net/10183/99391 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physical review letters. Melville. Vol. 91, no. 19 (Nov. 2003), 197208 4p. |
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openAccess |
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application/pdf |
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