Structural and magnetic transitions in cubic Mn3Ga

P. Kharel, Y. Huh, N. Al-Aqtash, V. R. Shah, R. F. Sabirianov, R. Skomski, D. J. Sellmyer

Research output: Contribution to journalArticle

23 Citations (Scopus)

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 languageEnglish (US)
Article number126001
JournalJournal of Physics Condensed Matter
Volume26
Issue number12
DOIs
StatePublished - Mar 26 2014

Fingerprint

Electron Transport
Electron transitions
Electron transport properties
arc melting
Temperature
melt spinning
Electron scattering
Melt spinning
Phase Transition
Freezing
Magnetic properties
electron scattering
Melting
electrons
transport properties
Phase transitions
Electrons
anomalies
magnetic properties
electrical resistivity

Keywords

  • Curie temperature
  • Heusler alloy
  • Kondo effect
  • high anisotropy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Structural and magnetic transitions in cubic Mn3Ga. / Kharel, P.; Huh, Y.; Al-Aqtash, N.; Shah, V. R.; Sabirianov, R. F.; Skomski, R.; Sellmyer, D. J.

In: Journal of Physics Condensed Matter, Vol. 26, No. 12, 126001, 26.03.2014.

Research output: Contribution to journalArticle

Kharel, P. ; Huh, Y. ; Al-Aqtash, N. ; Shah, V. R. ; Sabirianov, R. F. ; Skomski, R. ; Sellmyer, D. J. / Structural and magnetic transitions in cubic Mn3Ga. In: Journal of Physics Condensed Matter. 2014 ; Vol. 26, No. 12.
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