Structural and magnetic properties of Pr-alloyed MnBi nanostructures

Authors

Parashu Kharel, University of Nebraska-LincolnFollow
Shah R. Valloppilly, University of Nebraska-LincolnFollow
Xingzhong Li, University of Nebraska-LincolnFollow
Wenyong Zhang, University of Nebraska-LincolnFollow
Ralph Skomski, University of Nebraska at LincolnFollow
Jeffrey E. Shield, University of Nebraska - LincolnFollow
David J. Sellmyer, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

2013

Citation

Journal of Physics D: Applied Physics 46 (2013)

Abstract

The structural and magnetic properties of Pr-alloyed MnBi (short MnBi-Pr) nanostructures with a range of Pr concentrations are investigated. The nanostructures include thin films having Pr concen-trations 0, 2, 3, 5, and 9 at.% and melt-spun ribbons having Pr concentrations 0%, 2%, 4%, and 6%, respectively. Addition of Pr into the MnBi lattice has produced a significant change in the magnetic properties of these nanostructures, including an increase in coercivity and structural phase transition temperature, and a decrease in saturation magnetization and anisotropy energy. The highest value of coercivity measured in the films is 23 kOe and in the ribbons is 5.6 kOe. The observed magnetic properties are explained as the consequences of competing ferromagnetic and antiferromagnetic in-teractions.