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

Document Type

Article

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.