Substitution effects of cr or fe on the curie temperature for Mn-based layered compounds MnAlGe and MnGaGe with Cu2Sb-type structure

Rie Y. Umetsu; Yoshifuru Mitsui; Isamu Yuito; Teruaki Takeuchi; Hiroshi Kawarada

doi:10.1109/TMAG.2014.2321592

Substitution effects of cr or fe on the curie temperature for Mn-based layered compounds MnAlGe and MnGaGe with Cu₂Sb-type structure

Rie Y. Umetsu^*, Yoshifuru Mitsui, Isamu Yuito, Teruaki Takeuchi, Hiroshi Kawarada

^*Corresponding author for this work

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

8 Citations (Scopus)

Abstract

Structure, lattice parameters, spontaneous magnetization (I_s), and the Curie temperature (T_C) of MnAlGe and MnGaGe compounds with the Cu2 Sb-type structure and their substituted compounds were investigated. Cr substitution for Mn enhanced Is and T_C, whereas Fe substitution for Mn degraded them. These behaviors are in accord with the previously reported results, and are also common to the MnGaGe compound series. For MnAlGe, lattice parameter a increases by 0.2% and 0.4% for Cr and Fe substitution, while c changes by +0.1% and -1.3%, respectively. For MnGaGe, a decreases by 0.08% for Cr and increases by 0.2% for Fe substitution, while c changes by +0.5% and -1.0%, respectively. T_C tended to increase with increasing length of c, suggesting that the interlayer distance between Mn layers is a key factor related to the height of T_C, i.e., the strength of the magnetic exchange interaction.

Original language	English
Article number	6971459
Journal	IEEE Transactions on Magnetics
Volume	50
Issue number	11
DOIs	https://doi.org/10.1109/TMAG.2014.2321592
Publication status	Published - 2014 Nov 1

Keywords

Curie temperature
Mn-layered compound
lattice parameter
magnetic moment

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/TMAG.2014.2321592

Cite this

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title = "Substitution effects of cr or fe on the curie temperature for Mn-based layered compounds MnAlGe and MnGaGe with Cu2Sb-type structure",

abstract = "Structure, lattice parameters, spontaneous magnetization (Is), and the Curie temperature (TC) of MnAlGe and MnGaGe compounds with the Cu2 Sb-type structure and their substituted compounds were investigated. Cr substitution for Mn enhanced Is and TC, whereas Fe substitution for Mn degraded them. These behaviors are in accord with the previously reported results, and are also common to the MnGaGe compound series. For MnAlGe, lattice parameter a increases by 0.2% and 0.4% for Cr and Fe substitution, while c changes by +0.1% and -1.3%, respectively. For MnGaGe, a decreases by 0.08% for Cr and increases by 0.2% for Fe substitution, while c changes by +0.5% and -1.0%, respectively. TC tended to increase with increasing length of c, suggesting that the interlayer distance between Mn layers is a key factor related to the height of TC, i.e., the strength of the magnetic exchange interaction.",

keywords = "Curie temperature, Mn-layered compound, lattice parameter, magnetic moment",

author = "Umetsu, {Rie Y.} and Yoshifuru Mitsui and Isamu Yuito and Teruaki Takeuchi and Hiroshi Kawarada",

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T1 - Substitution effects of cr or fe on the curie temperature for Mn-based layered compounds MnAlGe and MnGaGe with Cu2Sb-type structure

AU - Umetsu, Rie Y.

AU - Mitsui, Yoshifuru

AU - Yuito, Isamu

AU - Takeuchi, Teruaki

AU - Kawarada, Hiroshi

PY - 2014/11/1

Y1 - 2014/11/1

N2 - Structure, lattice parameters, spontaneous magnetization (Is), and the Curie temperature (TC) of MnAlGe and MnGaGe compounds with the Cu2 Sb-type structure and their substituted compounds were investigated. Cr substitution for Mn enhanced Is and TC, whereas Fe substitution for Mn degraded them. These behaviors are in accord with the previously reported results, and are also common to the MnGaGe compound series. For MnAlGe, lattice parameter a increases by 0.2% and 0.4% for Cr and Fe substitution, while c changes by +0.1% and -1.3%, respectively. For MnGaGe, a decreases by 0.08% for Cr and increases by 0.2% for Fe substitution, while c changes by +0.5% and -1.0%, respectively. TC tended to increase with increasing length of c, suggesting that the interlayer distance between Mn layers is a key factor related to the height of TC, i.e., the strength of the magnetic exchange interaction.

AB - Structure, lattice parameters, spontaneous magnetization (Is), and the Curie temperature (TC) of MnAlGe and MnGaGe compounds with the Cu2 Sb-type structure and their substituted compounds were investigated. Cr substitution for Mn enhanced Is and TC, whereas Fe substitution for Mn degraded them. These behaviors are in accord with the previously reported results, and are also common to the MnGaGe compound series. For MnAlGe, lattice parameter a increases by 0.2% and 0.4% for Cr and Fe substitution, while c changes by +0.1% and -1.3%, respectively. For MnGaGe, a decreases by 0.08% for Cr and increases by 0.2% for Fe substitution, while c changes by +0.5% and -1.0%, respectively. TC tended to increase with increasing length of c, suggesting that the interlayer distance between Mn layers is a key factor related to the height of TC, i.e., the strength of the magnetic exchange interaction.

KW - Curie temperature

KW - Mn-layered compound

KW - lattice parameter

KW - magnetic moment

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