Geometric, electronic, and magnetic structure of Co/sub 2/FeSi: Curie temperature and magnetic moment measurements and calculations
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/104296 |
Resumo: | In this work a simple concept was used for a systematic search for materials with high spin polarization. It is based on two semiempirical models. First, the Slater-Pauling rule was used for estimation of the magnetic moment. This model is well supported by electronic structure calculations. The second model was found particularly for Co2 based Heusler compounds when comparing their magnetic properties. It turned out that these compounds exhibit seemingly a linear dependence of the Curie temperature as function of the magnetic moment. Stimulated by these models, Co2FeSi was revisited. The compound was investigated in detail concerning its geometrical and magnetic structure by means of x-ray diffraction, x-ray absorption, and Mössbauer spectroscopies as well as high and low temperature magnetometry. The measurements revealed that it is, currently, the material with the highest magnetic moment (6uB) and Curie temperature (1100 K) in the classes of Heusler compounds as well as half-metallic ferromagnets. The experimental findings are supported by detailed electronic structure calculations. |
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Wurmehl, SabineFecher, Gerhard H.Kandpal, Hem ChandraKsenofontov, VadimFelser, ClaudiaLin, Hong-JiMorais, Jonder2014-10-09T02:13:07Z20051098-0121http://hdl.handle.net/10183/104296000515221In this work a simple concept was used for a systematic search for materials with high spin polarization. It is based on two semiempirical models. First, the Slater-Pauling rule was used for estimation of the magnetic moment. This model is well supported by electronic structure calculations. The second model was found particularly for Co2 based Heusler compounds when comparing their magnetic properties. It turned out that these compounds exhibit seemingly a linear dependence of the Curie temperature as function of the magnetic moment. Stimulated by these models, Co2FeSi was revisited. The compound was investigated in detail concerning its geometrical and magnetic structure by means of x-ray diffraction, x-ray absorption, and Mössbauer spectroscopies as well as high and low temperature magnetometry. The measurements revealed that it is, currently, the material with the highest magnetic moment (6uB) and Curie temperature (1100 K) in the classes of Heusler compounds as well as half-metallic ferromagnets. The experimental findings are supported by detailed electronic structure calculations.application/pdfengPhysical review. B, Condensed matter and materials physics. Woodbury. Vol. 72, no. 18 (Nov. 2005), 184434 9p.FísicaGeometric, electronic, and magnetic structure of Co/sub 2/FeSi: Curie temperature and magnetic moment measurements and calculationsEstrangeiroinfo: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:UFRGSORIGINAL000515221.pdf000515221.pdfTexto completo (inglês)application/pdf595437http://www.lume.ufrgs.br/bitstream/10183/104296/1/000515221.pdfb6a17e4b35833170b2620b80e84fdc7aMD51TEXT000515221.pdf.txt000515221.pdf.txtExtracted Texttext/plain38392http://www.lume.ufrgs.br/bitstream/10183/104296/2/000515221.pdf.txtce5932589df90881098ae7a2745eb08bMD52THUMBNAIL000515221.pdf.jpg000515221.pdf.jpgGenerated Thumbnailimage/jpeg2083http://www.lume.ufrgs.br/bitstream/10183/104296/3/000515221.pdf.jpg4ac369c0e8f0c658d49311ceb4d915d0MD5310183/1042962023-07-19 03:40:25.611397oai:www.lume.ufrgs.br:10183/104296Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-19T06:40:25Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Geometric, electronic, and magnetic structure of Co/sub 2/FeSi: Curie temperature and magnetic moment measurements and calculations |
title |
Geometric, electronic, and magnetic structure of Co/sub 2/FeSi: Curie temperature and magnetic moment measurements and calculations |
spellingShingle |
Geometric, electronic, and magnetic structure of Co/sub 2/FeSi: Curie temperature and magnetic moment measurements and calculations Wurmehl, Sabine Física |
title_short |
Geometric, electronic, and magnetic structure of Co/sub 2/FeSi: Curie temperature and magnetic moment measurements and calculations |
title_full |
Geometric, electronic, and magnetic structure of Co/sub 2/FeSi: Curie temperature and magnetic moment measurements and calculations |
title_fullStr |
Geometric, electronic, and magnetic structure of Co/sub 2/FeSi: Curie temperature and magnetic moment measurements and calculations |
title_full_unstemmed |
Geometric, electronic, and magnetic structure of Co/sub 2/FeSi: Curie temperature and magnetic moment measurements and calculations |
title_sort |
Geometric, electronic, and magnetic structure of Co/sub 2/FeSi: Curie temperature and magnetic moment measurements and calculations |
author |
Wurmehl, Sabine |
author_facet |
Wurmehl, Sabine Fecher, Gerhard H. Kandpal, Hem Chandra Ksenofontov, Vadim Felser, Claudia Lin, Hong-Ji Morais, Jonder |
author_role |
author |
author2 |
Fecher, Gerhard H. Kandpal, Hem Chandra Ksenofontov, Vadim Felser, Claudia Lin, Hong-Ji Morais, Jonder |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Wurmehl, Sabine Fecher, Gerhard H. Kandpal, Hem Chandra Ksenofontov, Vadim Felser, Claudia Lin, Hong-Ji Morais, Jonder |
dc.subject.por.fl_str_mv |
Física |
topic |
Física |
description |
In this work a simple concept was used for a systematic search for materials with high spin polarization. It is based on two semiempirical models. First, the Slater-Pauling rule was used for estimation of the magnetic moment. This model is well supported by electronic structure calculations. The second model was found particularly for Co2 based Heusler compounds when comparing their magnetic properties. It turned out that these compounds exhibit seemingly a linear dependence of the Curie temperature as function of the magnetic moment. Stimulated by these models, Co2FeSi was revisited. The compound was investigated in detail concerning its geometrical and magnetic structure by means of x-ray diffraction, x-ray absorption, and Mössbauer spectroscopies as well as high and low temperature magnetometry. The measurements revealed that it is, currently, the material with the highest magnetic moment (6uB) and Curie temperature (1100 K) in the classes of Heusler compounds as well as half-metallic ferromagnets. The experimental findings are supported by detailed electronic structure calculations. |
publishDate |
2005 |
dc.date.issued.fl_str_mv |
2005 |
dc.date.accessioned.fl_str_mv |
2014-10-09T02:13:07Z |
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 |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/104296 |
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1098-0121 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000515221 |
identifier_str_mv |
1098-0121 000515221 |
url |
http://hdl.handle.net/10183/104296 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physical review. B, Condensed matter and materials physics. Woodbury. Vol. 72, no. 18 (Nov. 2005), 184434 9p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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