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

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5 Citations (Scopus)

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.

Original languageEnglish
Article number6971459
JournalIEEE Transactions on Magnetics
Volume50
Issue number11
DOIs
Publication statusPublished - 2014 Nov 1

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Curie temperature
Substitution reactions
Lattice constants
Exchange interactions
Magnetization

Keywords

  • Curie temperature
  • lattice parameter
  • magnetic moment
  • Mn-layered compound

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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.",
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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 - lattice parameter

KW - magnetic moment

KW - Mn-layered compound

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