Magnetism of Body-Centered Tetragonal FeRh1-xPdx Alloys (I) Magnetic Properties

 

Shinji Yuasa¹, Hideki Miyajima¹, Yoshichika Otani¹, and Akimasa Sakuma²

+ Affiliations

Received July 17, 1995

Abstract

Crystalline structures and magnetic properties of the FeRh _{1- x} Pd _x system were investigated. Substitution of Pd for Rh stabilized body-centered tetragonal (bct) structure of the ordered CuAu-type with increasing axial ratio c / a from 1.18 to 1.36. The bct alloys in the range x =0.530∼0.61 exhibited a first-order phase transition from antiferromagnetic to ferromagnetic state, while the bct alloys with x <0.530 exhibited a first-order phase transition from antiferromagnetic to Curie paramagnetic state. Both the axial ratio and the volume increased abruptly at the transitions. A new ferromagnetic phase with orthorhombic structure with the space group C _{m m m} was found in the bct alloys with x =0.525∼0.61 below room temperature. This ferromagnetic phase possesses a larger magnetic moment than that of the bct phase. Reduction of the crystalline symmetry may have enhanced the magnetic moment.

©1995 The Physical Society of Japan

https://doi.org/10.1143/JPSJ.64.4906

 

 https://sci-hub.se/https://doi.org/10.1143/JPSJ.64.4906