Abstract
The structural, magnetic and electron-transport properties of cubic Mn 3Ga 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.
Original language | English (US) |
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Article number | 126001 |
Journal | Journal of Physics Condensed Matter |
Volume | 26 |
Issue number | 12 |
DOIs | |
State | Published - Mar 26 2014 |
Keywords
- Curie temperature
- Heusler alloy
- Kondo effect
- high anisotropy
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics