High field X-ray diffraction studies on magnetic refrigerants

Keiichi Koyama; Fumihiro Ishikawa; Kazuo Watanabe

High field X-ray diffraction studies on magnetic refrigerants

Keiichi Koyama, Fumihiro Ishikawa, Kazuo Watanabe

High Field Laboratory for Superconducting Materials

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

4 Citations (Scopus)

Abstract

In this paper, we review our recent results on magnetic refrigerants MnAs_1-xSb_x and MnFeAs_0.5P_0.5 by powder X-ray diffraction measurements in fields up to 5 T and in the temperature range from 8 to 320 K. MnAs shows a first-ordered structural transition with the volume expansion of 2.1% accompanied by a metamagnetic transition, but MnAs_0.9Sb_0.1 exhibits an isostructural transition with the volume expansion of 1.1%. The cell volume of MnFeAs_0.5P _0.5 slightly (-0.4%) and continuously decreases with increasing a magnetic field through the metamagnetic transition.

Original language	English
Pages (from-to)	153-163
Number of pages	11
Journal	International Journal of Applied Electromagnetics and Mechanics
Volume	23
Issue number	3-4
Publication status	Published - 2006 Sep 25

Keywords

Field-induced phase transition
High field X-ray diffraction
Magnetic refrigerant
Magnetovolume effect

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Electrical and Electronic Engineering

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abstract = "In this paper, we review our recent results on magnetic refrigerants MnAs1-xSbx and MnFeAs0.5P0.5 by powder X-ray diffraction measurements in fields up to 5 T and in the temperature range from 8 to 320 K. MnAs shows a first-ordered structural transition with the volume expansion of 2.1% accompanied by a metamagnetic transition, but MnAs0.9Sb0.1 exhibits an isostructural transition with the volume expansion of 1.1%. The cell volume of MnFeAs0.5P 0.5 slightly (-0.4%) and continuously decreases with increasing a magnetic field through the metamagnetic transition.",

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AU - Koyama, Keiichi

AU - Ishikawa, Fumihiro

AU - Watanabe, Kazuo

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Y1 - 2006/9/25

N2 - In this paper, we review our recent results on magnetic refrigerants MnAs1-xSbx and MnFeAs0.5P0.5 by powder X-ray diffraction measurements in fields up to 5 T and in the temperature range from 8 to 320 K. MnAs shows a first-ordered structural transition with the volume expansion of 2.1% accompanied by a metamagnetic transition, but MnAs0.9Sb0.1 exhibits an isostructural transition with the volume expansion of 1.1%. The cell volume of MnFeAs0.5P 0.5 slightly (-0.4%) and continuously decreases with increasing a magnetic field through the metamagnetic transition.

AB - In this paper, we review our recent results on magnetic refrigerants MnAs1-xSbx and MnFeAs0.5P0.5 by powder X-ray diffraction measurements in fields up to 5 T and in the temperature range from 8 to 320 K. MnAs shows a first-ordered structural transition with the volume expansion of 2.1% accompanied by a metamagnetic transition, but MnAs0.9Sb0.1 exhibits an isostructural transition with the volume expansion of 1.1%. The cell volume of MnFeAs0.5P 0.5 slightly (-0.4%) and continuously decreases with increasing a magnetic field through the metamagnetic transition.

KW - Field-induced phase transition

KW - High field X-ray diffraction

KW - Magnetic refrigerant

KW - Magnetovolume effect

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SN - 1383-5416

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High field X-ray diffraction studies on magnetic refrigerants

Abstract

Keywords

ASJC Scopus subject areas

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