Anomalous structural transformation and magnetism of Fe-Ga alloys

Masafumi Matsushita; Yasushi Matsushima; Fumihisa Ono

doi:10.1016/j.physb.2009.11.026

Anomalous structural transformation and magnetism of Fe-Ga alloys

Masafumi Matsushita, Yasushi Matsushima, Fumihisa Ono

Research output: Contribution to journal › Article

6 Citations (Scopus)

Abstract

We have investigated the thermal expansion properties, crystal structures, and magnetism of Fe_1-XGa_X alloys with 27.519). The transformation from the FCC to the D0₁₉ phase is accompanied by a decrease in volume per atom of the alloys, in spite of an increase in the temperature. The Curie temperature of FCC Fe-Ga alloys is higher than that of BCC Fe-Ga alloys, and D0₁₉ show the non-magnetic in present work. Considering from the above-mentioned results, the anomalous volume behavior accompanying the crystal structure transformation can be related to the contribution of magnetism in FCC Fe-Ga alloys. In a previous report, an FCC structure was obtained by carrying out long-time annealing at 550 °C. However, in this study, the FCC structure is obtained from the BCC structure as the temperature increases smoothly at a rate of 5 °C/min. Moreover, the Fe_62.5Ga_37.5 alloy undergoes a structural transformation from the BCC to an unknown high-temperature phase.

Original language	English
Pages (from-to)	1154-1157
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	405
Issue number	4
DOIs	https://doi.org/10.1016/j.physb.2009.11.026
Publication status	Published - Feb 15 2010

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Keywords

Alloys
Crystal structure
Magnetic properties
Phase transition
Thermal expansion
X-ray diffraction

ASJC Scopus subject areas

Condensed Matter Physics
Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Cite this

Matsushita, M., Matsushima, Y., & Ono, F. (2010). Anomalous structural transformation and magnetism of Fe-Ga alloys. Physica B: Condensed Matter, 405(4), 1154-1157. https://doi.org/10.1016/j.physb.2009.11.026

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title = "Anomalous structural transformation and magnetism of Fe-Ga alloys",

abstract = "We have investigated the thermal expansion properties, crystal structures, and magnetism of Fe1-XGaX alloys with 27.519). The transformation from the FCC to the D019 phase is accompanied by a decrease in volume per atom of the alloys, in spite of an increase in the temperature. The Curie temperature of FCC Fe-Ga alloys is higher than that of BCC Fe-Ga alloys, and D019 show the non-magnetic in present work. Considering from the above-mentioned results, the anomalous volume behavior accompanying the crystal structure transformation can be related to the contribution of magnetism in FCC Fe-Ga alloys. In a previous report, an FCC structure was obtained by carrying out long-time annealing at 550 °C. However, in this study, the FCC structure is obtained from the BCC structure as the temperature increases smoothly at a rate of 5 °C/min. Moreover, the Fe62.5Ga37.5 alloy undergoes a structural transformation from the BCC to an unknown high-temperature phase.",

keywords = "Alloys, Crystal structure, Magnetic properties, Phase transition, Thermal expansion, X-ray diffraction",

author = "Masafumi Matsushita and Yasushi Matsushima and Fumihisa Ono",

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T1 - Anomalous structural transformation and magnetism of Fe-Ga alloys

AU - Matsushita, Masafumi

AU - Matsushima, Yasushi

AU - Ono, Fumihisa

PY - 2010/2/15

Y1 - 2010/2/15

N2 - We have investigated the thermal expansion properties, crystal structures, and magnetism of Fe1-XGaX alloys with 27.519). The transformation from the FCC to the D019 phase is accompanied by a decrease in volume per atom of the alloys, in spite of an increase in the temperature. The Curie temperature of FCC Fe-Ga alloys is higher than that of BCC Fe-Ga alloys, and D019 show the non-magnetic in present work. Considering from the above-mentioned results, the anomalous volume behavior accompanying the crystal structure transformation can be related to the contribution of magnetism in FCC Fe-Ga alloys. In a previous report, an FCC structure was obtained by carrying out long-time annealing at 550 °C. However, in this study, the FCC structure is obtained from the BCC structure as the temperature increases smoothly at a rate of 5 °C/min. Moreover, the Fe62.5Ga37.5 alloy undergoes a structural transformation from the BCC to an unknown high-temperature phase.

AB - We have investigated the thermal expansion properties, crystal structures, and magnetism of Fe1-XGaX alloys with 27.519). The transformation from the FCC to the D019 phase is accompanied by a decrease in volume per atom of the alloys, in spite of an increase in the temperature. The Curie temperature of FCC Fe-Ga alloys is higher than that of BCC Fe-Ga alloys, and D019 show the non-magnetic in present work. Considering from the above-mentioned results, the anomalous volume behavior accompanying the crystal structure transformation can be related to the contribution of magnetism in FCC Fe-Ga alloys. In a previous report, an FCC structure was obtained by carrying out long-time annealing at 550 °C. However, in this study, the FCC structure is obtained from the BCC structure as the temperature increases smoothly at a rate of 5 °C/min. Moreover, the Fe62.5Ga37.5 alloy undergoes a structural transformation from the BCC to an unknown high-temperature phase.

KW - Alloys

KW - Crystal structure

KW - Magnetic properties

KW - Phase transition

KW - Thermal expansion

KW - X-ray diffraction

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10.1016/j.physb.2009.11.026