Effect of Co substitution on the magnetic and electron-transport properties of Mn2PtSn

Y. Huh, P. Kharel, A. Nelson, V. R. Shah, J. Pereiro, P. Manchanda, A. Kashyap, R. Skomski, David J Sellmyer

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The structural, magnetic and electron-transport properties of Mn2Pt1-xCoxSn(x?=0, 0.3, 0.5, 0.7, 1) ribbons prepared by arc-melting and melt-spinning were investigated. The rapidly quenched alloys with x?=0 and 0.3 were found to crystallize in the inverse tetragonal structure, but the structure transformed into inverse cubic as x increased to 0.5. At room temperature, the samples are ferro or ferrimagnetic, and the Curie temperature increases by 225 K from 370 K for Mn2PtSn (x?=0) to 595 K for Mn2CoSn (x?=1). The measured anisotropy constants for the inverse-tetragonal alloys are on the order of 1 Merg cm-3 at room temperature. The ribbons are moderately conducting with the room temperature resistivities being between 0.4 and 8.4 mΩ cm. Interestingly, the thermal coefficient of resistivity transforms from positive to negative and the magnetoresistance transforms from negative to positive as the value of x reaches 0.5.

Original languageEnglish (US)
Article number076002
JournalJournal of Physics Condensed Matter
Volume27
Issue number7
DOIs
StatePublished - Feb 25 2015

Fingerprint

Electron transport properties
Substitution reactions
transport properties
substitutes
ribbons
room temperature
arc melting
electrical resistivity
melt spinning
electrons
Melt spinning
Magnetoresistance
Curie temperature
Temperature
Melting
Anisotropy
conduction
anisotropy
coefficients

Keywords

  • Heusler alloy
  • magnetic anisotropy
  • magnetoresistance
  • melt-spinning

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Effect of Co substitution on the magnetic and electron-transport properties of Mn2PtSn. / Huh, Y.; Kharel, P.; Nelson, A.; Shah, V. R.; Pereiro, J.; Manchanda, P.; Kashyap, A.; Skomski, R.; Sellmyer, David J.

In: Journal of Physics Condensed Matter, Vol. 27, No. 7, 076002, 25.02.2015.

Research output: Contribution to journalArticle

Huh, Y, Kharel, P, Nelson, A, Shah, VR, Pereiro, J, Manchanda, P, Kashyap, A, Skomski, R & Sellmyer, DJ 2015, 'Effect of Co substitution on the magnetic and electron-transport properties of Mn2PtSn', Journal of Physics Condensed Matter, vol. 27, no. 7, 076002. https://doi.org/10.1088/0953-8984/27/7/076002
Huh, Y. ; Kharel, P. ; Nelson, A. ; Shah, V. R. ; Pereiro, J. ; Manchanda, P. ; Kashyap, A. ; Skomski, R. ; Sellmyer, David J. / Effect of Co substitution on the magnetic and electron-transport properties of Mn2PtSn. In: Journal of Physics Condensed Matter. 2015 ; Vol. 27, No. 7.
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