Structural, magnetic, and electron transport properties of Mn_3-xPt_xSn (x = 0, 0.5, 1) nanomaterials

Authors

A Nelson, South Dakota State University, University of Nebraska-Lincoln
Yung Huh, South Dakota State University, University of Nebraska-LincolnFollow
Parashu Kharel, South Dakota State University, University of Nebraska-LincolnFollow
Shah R. Valloppilly, University of Nebraska-LincolnFollow
Ralph A. Skomski, University of Nebraska-LincolnFollow
David J. Sellmyer, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

2014

Citation

JOURNAL OF APPLIED PHYSICS 115, 17A923 (2014)

Abstract

The structural, magnetic, and electron-transport properties of Mn_3-xPt_xSn (x=0, 0.5, 1) nanomaterials prepared by arc-melting, melt-spinning, and annealing were investigated. It was found that the hexagonal structure is the most stable structure for Mn³Sn and the samples show an antiferromagnetic spin order at room temperature. The Pt-containing samples are mainly tetragonal but contain a small amount of other impurity phases, including hexagonal Mn³Sn and Mn₂Sn. At room temperature, the Pt-containing samples show ferri- or ferromagnetic spin order with a Curie temperature of about 370 K. The measured high-field magnetization and anisotropy constant for Mn₂PtSn are 405 emu/cm³ and 2.6 Mergs/cm³, respectively. The samples are all highly conducting with metallic electron transport and show a substantial negative magnetoresistance.