Structural and magnetic properties of Mn_{2 +δ}TiSn

Authors

Parashu Kharel, University of Nebraska-LincolnFollow
Yung Huh, University of Nebraska-LincolnFollow
Shah R. Valloppilly, University of Nebraska-LincolnFollow
Xingzhong Li, University of Nebraska-LincolnFollow
N. Al-Agtash, University of Nebraska at Omaha
K. Tarawneh, Princes Sumaya University for Technology (PSUT)
E. S. Krage, South Dakota State University
Renat F. Sabirianov, University of Nebraska at OmahaFollow
Ralph Skomski, University of Nebraska-LincolnFollow
David J. Sellmyer, NCMNFollow

Date of this Version

2012

Citation

JOURNAL OF APPLIED PHYSICS 111, 07B101 (2012). doi:10.1063/1.3672395

Comments

Copyright © 2012 American Institute of Physics. Used by Permission.

Abstract

The structural and magnetic properties of Mn_{2 +δ}TiSn prepared by arc melting and annealing have been investigated. Structural studies show that the compound crystallizes in the hexagonal Ni₃Sn-type structure with a=5.70Å and c=4.55Å . The phase stability of Mn₂TiSn in the hexagonal structure is supported by the first-principle electronic structure calculations where the total energy per unit-cell volume in the hexagonal structure is smaller than that in the cubic structure. Field and temperature dependence of magnetization show that the sample is magnetically ordered with a Curie temperature around 400 K. The anisotropy energy calculated from the high-field data is 4.0×10⁵ ergs/cm³ at 300K but increases by a factor of two (8.6×10⁵ ergs/cm³) as temperature decreases to 10 K. The observed magnetic properties are explained as the consequences of competing ferromagnetic and antiferromagnetic interactions between different magnetic sublattices.