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
Hauptverfasser: Kharel, P, Huh, Y, Al-Aqtash, N, Shah, V R, Sabirianov, R F, Skomski, R, Sellmyer, D J
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container_end_page 126001
container_issue 12
container_start_page 126001
container_title Journal of physics. Condensed matter
container_volume 26
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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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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