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

Shinji Yuasa; Hideki Miyajima; Yoshichika Otani; Akimasa Sakuma

doi:10.1143/JPSJ.64.4906

Magnetism of Body-Centered Tetragonal FeRh_1−xPd_x Alloys (I) Magnetic Properties

Shinji Yuasa, Hideki Miyajima, Yoshichika Otani, Akimasa Sakuma

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

Crystalline structures and magnetic properties of the FeRh_1−xPd_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_mmm 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.

Original language	English
Pages (from-to)	4906-4913
Number of pages	8
Journal	journal of the physical society of japan
Volume	64
Issue number	12
DOIs	https://doi.org/10.1143/JPSJ.64.4906
Publication status	Published - 1995 Jan 1
Externally published	Yes

Keywords

FeRhPd alloys
body-centered tetragonal structure
magneto-volume effect
orthorhombic structure
tetragonal elongation effect

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Magnetism of Body-Centered Tetragonal FeRh1−xPdx Alloys (I) Magnetic Properties",

abstract = "Crystalline structures and magnetic properties of the FeRh1−xPdx 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 Cmmm 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.",

keywords = "FeRhPd alloys, body-centered tetragonal structure, magneto-volume effect, orthorhombic structure, tetragonal elongation effect",

author = "Shinji Yuasa and Hideki Miyajima and Yoshichika Otani and Akimasa Sakuma",

year = "1995",

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T1 - Magnetism of Body-Centered Tetragonal FeRh1−xPdx Alloys (I) Magnetic Properties

AU - Yuasa, Shinji

AU - Miyajima, Hideki

AU - Otani, Yoshichika

AU - Sakuma, Akimasa

PY - 1995/1/1

Y1 - 1995/1/1

N2 - Crystalline structures and magnetic properties of the FeRh1−xPdx 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 Cmmm 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.

AB - Crystalline structures and magnetic properties of the FeRh1−xPdx 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 Cmmm 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.

KW - FeRhPd alloys

KW - body-centered tetragonal structure

KW - magneto-volume effect

KW - orthorhombic structure

KW - tetragonal elongation effect

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