Structural and magnetic transitions in cubic Mn3Ga
The structural, magnetic and electron-transport properties of cubic Mn3Ga have been investigated. The alloys prepared by arc melting and melt-spinning show an antiferromagnetic spin order at room temperature but undergo coupled structural and magnetic phase transitions at 600 and 800 K. First-princi...
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Veröffentlicht in: | Journal of physics. Condensed matter 2014-03, Vol.26 (12), p.126001-126001 |
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creator | Kharel, P Huh, Y Al-Aqtash, N Shah, V R Sabirianov, R F Skomski, R Sellmyer, D J |
description | The structural, magnetic and electron-transport properties of cubic Mn3Ga have been investigated. The alloys prepared by arc melting and melt-spinning show an antiferromagnetic spin order at room temperature but undergo coupled structural and magnetic phase transitions at 600 and 800 K. First-principles calculations show that the observed magnetic properties are consistent with that of a cubic Mn3Ga crystallizing in the disordered Cu3Au-type structure. The samples exhibit metallic electron transport with a resistance minimum near 30 K, followed by a logarithmic upturn below the minimum. The observed anomaly in the low-temperature resistivity has been discussed as a consequence of electron scattering at the low-lying excitations of the structurally disordered Mn3Ga lattice. |
doi_str_mv | 10.1088/0953-8984/26/12/126001 |
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The alloys prepared by arc melting and melt-spinning show an antiferromagnetic spin order at room temperature but undergo coupled structural and magnetic phase transitions at 600 and 800 K. First-principles calculations show that the observed magnetic properties are consistent with that of a cubic Mn3Ga crystallizing in the disordered Cu3Au-type structure. The samples exhibit metallic electron transport with a resistance minimum near 30 K, followed by a logarithmic upturn below the minimum. The observed anomaly in the low-temperature resistivity has been discussed as a consequence of electron scattering at the low-lying excitations of the structurally disordered Mn3Ga lattice.</description><identifier>ISSN: 0953-8984</identifier><identifier>EISSN: 1361-648X</identifier><identifier>DOI: 10.1088/0953-8984/26/12/126001</identifier><identifier>PMID: 24594858</identifier><identifier>CODEN: JCOMEL</identifier><language>eng</language><publisher>England: IOP Publishing</publisher><subject>Computer Simulation ; Curie temperature ; Electric Conductivity ; Gallium - chemistry ; Heusler alloy ; high anisotropy ; Kondo effect ; Magnetic Fields ; Manganese - chemistry ; Materials Testing ; Models, Chemical ; Models, Molecular ; Molecular Conformation ; Phase Transition</subject><ispartof>Journal of physics. 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The observed anomaly in the low-temperature resistivity has been discussed as a consequence of electron scattering at the low-lying excitations of the structurally disordered Mn3Ga lattice.</description><subject>Computer Simulation</subject><subject>Curie temperature</subject><subject>Electric Conductivity</subject><subject>Gallium - chemistry</subject><subject>Heusler alloy</subject><subject>high anisotropy</subject><subject>Kondo effect</subject><subject>Magnetic Fields</subject><subject>Manganese - chemistry</subject><subject>Materials Testing</subject><subject>Models, Chemical</subject><subject>Models, Molecular</subject><subject>Molecular Conformation</subject><subject>Phase Transition</subject><issn>0953-8984</issn><issn>1361-648X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNo9kE1LAzEQhoMotlb_Qtmjl7X5mmz2KEWrUPGggreQZLOSsputSfbgv3dLqzAwMDzMzPsgtCT4jmApV7gGVspa8hUVK0KnEhiTMzQnTJBScPl5jub_0AxdpbTDGHPJ-CWaUQ41lyDniL7lONo8Rt0VOjRFr7-Cy94WOeqQfPZDSIUPhR3NNHwJbKOv0UWru-RuTn2BPh4f3tdP5fZ187y-35aeAs-l49ZJ0zin25ZiQy1AIxjQqm1dxcBAbUXDODhJKwKkkhyoq5nBpLFGcsMW6Pa4dx-H79GlrHqfrOs6HdwwJkUAw3SpwmJClyd0NL1r1D76Xscf9ZdzAugR8MNe7YYxhulzRbA6yFQHT-rgSVGhCFVHmewXkbljjg</recordid><startdate>20140326</startdate><enddate>20140326</enddate><creator>Kharel, P</creator><creator>Huh, Y</creator><creator>Al-Aqtash, N</creator><creator>Shah, V R</creator><creator>Sabirianov, R F</creator><creator>Skomski, R</creator><creator>Sellmyer, D J</creator><general>IOP Publishing</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>7X8</scope></search><sort><creationdate>20140326</creationdate><title>Structural and magnetic transitions in cubic Mn3Ga</title><author>Kharel, P ; Huh, Y ; Al-Aqtash, N ; Shah, V R ; Sabirianov, R F ; Skomski, R ; Sellmyer, D J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i254t-e4ce8bdeeaff20b2c55d63527ffe735b59c6d345e82715178452e93b01dcb84b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Computer Simulation</topic><topic>Curie temperature</topic><topic>Electric Conductivity</topic><topic>Gallium - chemistry</topic><topic>Heusler alloy</topic><topic>high anisotropy</topic><topic>Kondo effect</topic><topic>Magnetic Fields</topic><topic>Manganese - chemistry</topic><topic>Materials Testing</topic><topic>Models, Chemical</topic><topic>Models, Molecular</topic><topic>Molecular Conformation</topic><topic>Phase Transition</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kharel, P</creatorcontrib><creatorcontrib>Huh, Y</creatorcontrib><creatorcontrib>Al-Aqtash, N</creatorcontrib><creatorcontrib>Shah, V R</creatorcontrib><creatorcontrib>Sabirianov, R F</creatorcontrib><creatorcontrib>Skomski, R</creatorcontrib><creatorcontrib>Sellmyer, D J</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of physics. 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The alloys prepared by arc melting and melt-spinning show an antiferromagnetic spin order at room temperature but undergo coupled structural and magnetic phase transitions at 600 and 800 K. First-principles calculations show that the observed magnetic properties are consistent with that of a cubic Mn3Ga crystallizing in the disordered Cu3Au-type structure. The samples exhibit metallic electron transport with a resistance minimum near 30 K, followed by a logarithmic upturn below the minimum. The observed anomaly in the low-temperature resistivity has been discussed as a consequence of electron scattering at the low-lying excitations of the structurally disordered Mn3Ga lattice.</abstract><cop>England</cop><pub>IOP Publishing</pub><pmid>24594858</pmid><doi>10.1088/0953-8984/26/12/126001</doi><tpages>8</tpages></addata></record> |
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subjects | Computer Simulation Curie temperature Electric Conductivity Gallium - chemistry Heusler alloy high anisotropy Kondo effect Magnetic Fields Manganese - chemistry Materials Testing Models, Chemical Models, Molecular Molecular Conformation Phase Transition |
title | Structural and magnetic transitions in cubic Mn3Ga |
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