Electronic and crystallographic structure, hard x-ray photoemission, and mechanical and transport properties of the half-metallic Heusler compound Co2MnGe
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/104527 |
Resumo: | This work reports on the electronic and crystalline structure and the mechanical, magnetic, and transport properties of the polycrystalline Heusler compound Co2MnGe. The crystalline structure was examined in detail by extended x-ray absorption fine-structure spectroscopy and anomalous x-ray diffraction. The compound exhibits a well-ordered L21 structure as is typical for Heusler compounds with 2:1:1 stoichiometry. The low-temperature magnetic moment agrees well with the Slater-Pauling rule and indicates a half-metallic ferromagnetic state of the compound, as is predicted by ab initio calculations. Transport measurements and hard x-ray photoelectron spectroscopy were performed to explain the electronic structure of the compound. The obtained valence band spectra exhibit small energy shifts that are the result of the photoexcitation process, whereas electron-electron correlation in the ground state is negligible. The vibration and mechanical properties of the compound were calculated. The observed hardness values are consistent to a covalent-like bonding of Co2MnGe. |
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Ouardi, SihamFecher, Gerhard H.Balke, BenjaminBeleanu, AndreeaKozina, XeniyaStryganyuk, GregoryFelser, ClaudiaKlöß, WernerSchrader, HartmutBernardi, FabianoMorais, JonderIkenaga, EijiYamashita, YoshiyukiUeda, ShigenoriKobayashi, Keisuke2014-10-14T02:13:07Z20111098-0121http://hdl.handle.net/10183/104527000794555This work reports on the electronic and crystalline structure and the mechanical, magnetic, and transport properties of the polycrystalline Heusler compound Co2MnGe. The crystalline structure was examined in detail by extended x-ray absorption fine-structure spectroscopy and anomalous x-ray diffraction. The compound exhibits a well-ordered L21 structure as is typical for Heusler compounds with 2:1:1 stoichiometry. The low-temperature magnetic moment agrees well with the Slater-Pauling rule and indicates a half-metallic ferromagnetic state of the compound, as is predicted by ab initio calculations. Transport measurements and hard x-ray photoelectron spectroscopy were performed to explain the electronic structure of the compound. The obtained valence band spectra exhibit small energy shifts that are the result of the photoexcitation process, whereas electron-electron correlation in the ground state is negligible. The vibration and mechanical properties of the compound were calculated. The observed hardness values are consistent to a covalent-like bonding of Co2MnGe.application/pdfengPhysical review. B, Condensed matter and materials physics. Woodbury. Vol. 84, no. 15 (Oct. 2011), 155122, 12 p.Física da matéria condensadaMateriais ferromagnéticosMomentos magnéticosEstrutura cristalinaEstrutura eletrônicaEstrutura fina estendida de absorção de raios x (EXAFS)Ligas de cobaltoLigas de manganêsCalculos ab initioEstequiometriaVibracoesElectronic and crystallographic structure, hard x-ray photoemission, and mechanical and transport properties of the half-metallic Heusler compound Co2MnGeEstrangeiroinfo: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:UFRGSORIGINAL000794555.pdf000794555.pdfTexto completo (inglês)application/pdf2465105http://www.lume.ufrgs.br/bitstream/10183/104527/1/000794555.pdf7ca1be6be7f3ae1476a589c4b7fe8bb3MD51TEXT000794555.pdf.txt000794555.pdf.txtExtracted Texttext/plain56753http://www.lume.ufrgs.br/bitstream/10183/104527/2/000794555.pdf.txt160b2a0f6e88382b32b82da826654602MD52THUMBNAIL000794555.pdf.jpg000794555.pdf.jpgGenerated Thumbnailimage/jpeg2053http://www.lume.ufrgs.br/bitstream/10183/104527/3/000794555.pdf.jpg3f0a409d8908c4e73e6aed90c7519517MD5310183/1045272023-07-09 03:36:25.059955oai:www.lume.ufrgs.br:10183/104527Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-09T06:36:25Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Electronic and crystallographic structure, hard x-ray photoemission, and mechanical and transport properties of the half-metallic Heusler compound Co2MnGe |
title |
Electronic and crystallographic structure, hard x-ray photoemission, and mechanical and transport properties of the half-metallic Heusler compound Co2MnGe |
spellingShingle |
Electronic and crystallographic structure, hard x-ray photoemission, and mechanical and transport properties of the half-metallic Heusler compound Co2MnGe Ouardi, Siham Física da matéria condensada Materiais ferromagnéticos Momentos magnéticos Estrutura cristalina Estrutura eletrônica Estrutura fina estendida de absorção de raios x (EXAFS) Ligas de cobalto Ligas de manganês Calculos ab initio Estequiometria Vibracoes |
title_short |
Electronic and crystallographic structure, hard x-ray photoemission, and mechanical and transport properties of the half-metallic Heusler compound Co2MnGe |
title_full |
Electronic and crystallographic structure, hard x-ray photoemission, and mechanical and transport properties of the half-metallic Heusler compound Co2MnGe |
title_fullStr |
Electronic and crystallographic structure, hard x-ray photoemission, and mechanical and transport properties of the half-metallic Heusler compound Co2MnGe |
title_full_unstemmed |
Electronic and crystallographic structure, hard x-ray photoemission, and mechanical and transport properties of the half-metallic Heusler compound Co2MnGe |
title_sort |
Electronic and crystallographic structure, hard x-ray photoemission, and mechanical and transport properties of the half-metallic Heusler compound Co2MnGe |
author |
Ouardi, Siham |
author_facet |
Ouardi, Siham Fecher, Gerhard H. Balke, Benjamin Beleanu, Andreea Kozina, Xeniya Stryganyuk, Gregory Felser, Claudia Klöß, Werner Schrader, Hartmut Bernardi, Fabiano Morais, Jonder Ikenaga, Eiji Yamashita, Yoshiyuki Ueda, Shigenori Kobayashi, Keisuke |
author_role |
author |
author2 |
Fecher, Gerhard H. Balke, Benjamin Beleanu, Andreea Kozina, Xeniya Stryganyuk, Gregory Felser, Claudia Klöß, Werner Schrader, Hartmut Bernardi, Fabiano Morais, Jonder Ikenaga, Eiji Yamashita, Yoshiyuki Ueda, Shigenori Kobayashi, Keisuke |
author2_role |
author author author author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Ouardi, Siham Fecher, Gerhard H. Balke, Benjamin Beleanu, Andreea Kozina, Xeniya Stryganyuk, Gregory Felser, Claudia Klöß, Werner Schrader, Hartmut Bernardi, Fabiano Morais, Jonder Ikenaga, Eiji Yamashita, Yoshiyuki Ueda, Shigenori Kobayashi, Keisuke |
dc.subject.por.fl_str_mv |
Física da matéria condensada Materiais ferromagnéticos Momentos magnéticos Estrutura cristalina Estrutura eletrônica Estrutura fina estendida de absorção de raios x (EXAFS) Ligas de cobalto Ligas de manganês Calculos ab initio Estequiometria Vibracoes |
topic |
Física da matéria condensada Materiais ferromagnéticos Momentos magnéticos Estrutura cristalina Estrutura eletrônica Estrutura fina estendida de absorção de raios x (EXAFS) Ligas de cobalto Ligas de manganês Calculos ab initio Estequiometria Vibracoes |
description |
This work reports on the electronic and crystalline structure and the mechanical, magnetic, and transport properties of the polycrystalline Heusler compound Co2MnGe. The crystalline structure was examined in detail by extended x-ray absorption fine-structure spectroscopy and anomalous x-ray diffraction. The compound exhibits a well-ordered L21 structure as is typical for Heusler compounds with 2:1:1 stoichiometry. The low-temperature magnetic moment agrees well with the Slater-Pauling rule and indicates a half-metallic ferromagnetic state of the compound, as is predicted by ab initio calculations. Transport measurements and hard x-ray photoelectron spectroscopy were performed to explain the electronic structure of the compound. The obtained valence band spectra exhibit small energy shifts that are the result of the photoexcitation process, whereas electron-electron correlation in the ground state is negligible. The vibration and mechanical properties of the compound were calculated. The observed hardness values are consistent to a covalent-like bonding of Co2MnGe. |
publishDate |
2011 |
dc.date.issued.fl_str_mv |
2011 |
dc.date.accessioned.fl_str_mv |
2014-10-14T02:13:07Z |
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/10183/104527 |
dc.identifier.issn.pt_BR.fl_str_mv |
1098-0121 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000794555 |
identifier_str_mv |
1098-0121 000794555 |
url |
http://hdl.handle.net/10183/104527 |
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. 84, no. 15 (Oct. 2011), 155122, 12 p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
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