TY - JOUR
T1 - Magnetic-field-induced selective retardation of reaction in Mn/Ga diffusion couple
AU - Watanabe, Yumi
AU - Kobayashi, Ryota
AU - Mitsui, Yoshifuru
AU - Umetsu, Rie Y.
AU - Koyama, Keiichi
N1 - Funding Information:
This work was supported by Japan Society for the Promotion Science (JSPS) KAKENHI Grant Number (16K14374). EPMA analysis was performed at the Division of Instrumental Analysis, Research Support Center, Kagoshima University.
Funding Information:
This work was supported by Japan Society for the Promotion Science (JSPS) KAKENHI Grant Number ( 16K14374 ). EPMA analysis was performed at the Division of Instrumental Analysis, Research Support Center, Kagoshima University.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/12/20
Y1 - 2021/12/20
N2 - In-field heat treatments of a solid-liquid Mn/Ga diffusion couple were conducted at 573 and 673 K with and without a magnetic field of 5 T to investigate magnetic field effects on the phase formation. Formation of the β-Mn, Mn3Ga, γ-MnGa, λ-MnGa, Mn2Ga5, and MnGa4 phases was observed. The obtained results indicated that the reaction and phase growth of λ-MnGa and Mn2Ga5 proceeded by diffusion-controlled process for both heat treatments at 0 and 5 T. We confirmed that a magnetic field suppressed the phase growth of λ-MnGa and Mn2Ga5. The parabolic coefficients of the λ-MnGa and Mn2Ga5 phases were exponentially suppressed by applying magnetic field of 5 T. It is suggested that gain of Zeeman energy of Mn-rich phase played a key role for the magnetic-field-induced suppression of the formation of the λ-MnGa and Mn2Ga5 phases.
AB - In-field heat treatments of a solid-liquid Mn/Ga diffusion couple were conducted at 573 and 673 K with and without a magnetic field of 5 T to investigate magnetic field effects on the phase formation. Formation of the β-Mn, Mn3Ga, γ-MnGa, λ-MnGa, Mn2Ga5, and MnGa4 phases was observed. The obtained results indicated that the reaction and phase growth of λ-MnGa and Mn2Ga5 proceeded by diffusion-controlled process for both heat treatments at 0 and 5 T. We confirmed that a magnetic field suppressed the phase growth of λ-MnGa and Mn2Ga5. The parabolic coefficients of the λ-MnGa and Mn2Ga5 phases were exponentially suppressed by applying magnetic field of 5 T. It is suggested that gain of Zeeman energy of Mn-rich phase played a key role for the magnetic-field-induced suppression of the formation of the λ-MnGa and Mn2Ga5 phases.
KW - Diffusion
KW - High magnetic fields
KW - Liquid-solid reactions
KW - Magnetically ordered materials
KW - Transition metal alloys and compounds
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U2 - 10.1016/j.jallcom.2021.161310
DO - 10.1016/j.jallcom.2021.161310
M3 - Article
AN - SCOPUS:85111745090
VL - 887
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
M1 - 161310
ER -