High-field magnetization and magnetic phase diagram of metamagnetic shape memory alloys Ni50                             −                             xCoxMn31.5Ga18.5 ( x = 9 and 9.7)

T. Kihara; X. Xu; A. Miyake; Y. Kinoshita; M. Tokunaga; Y. Adachi; T. Kanomata

doi:10.1016/j.scriptamat.2020.02.009

High-field magnetization and magnetic phase diagram of metamagnetic shape memory alloys Ni₅₀ ₋ _xCo_xMn_31.5Ga_18.5 ( x = 9 and 9.7)

T. Kihara, X. Xu, A. Miyake, Y. Kinoshita, M. Tokunaga, Y. Adachi, T. Kanomata

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

2 Citations (Scopus)

Abstract

Magnetic phase diagrams of the metamagnetic shape memory alloys Ni_50-xCo_xMn_31.5Ga_18.5 (x = 9 and 9.7) were produced from high-field magnetization measurements up to 56 T. For both compounds, magnetic field induced martensitic transformations are observed at various temperatures below 300 K. Hysteresis of the field-induced transformation shows unconventional temperature dependence: it decreases with decreasing temperature after showing a peak. Magnetic susceptibility measurement, microscopy, and X-ray diffraction data suggest a model incorporating the magnetic anisotropy and Zeeman energy in two variants, which qualitatively explains the thermal and the magnetic field history dependence of the hysteresis in these alloys.

Original language	English
Pages (from-to)	25-29
Number of pages	5
Journal	Scripta Materialia
Volume	181
DOIs	https://doi.org/10.1016/j.scriptamat.2020.02.009
Publication status	Published - May 2020
Externally published	Yes

Keywords

Heusler alloy
High magnetic field
Hysteresis
Martensitic transformation

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Access to Document

10.1016/j.scriptamat.2020.02.009

Cite this

@article{b334bf3bc5d34e13a0fcd1df816005d1,

title = "High-field magnetization and magnetic phase diagram of metamagnetic shape memory alloys Ni50 − xCoxMn31.5Ga18.5 ( x = 9 and 9.7)",

abstract = "Magnetic phase diagrams of the metamagnetic shape memory alloys Ni50-xCoxMn31.5Ga18.5 (x = 9 and 9.7) were produced from high-field magnetization measurements up to 56 T. For both compounds, magnetic field induced martensitic transformations are observed at various temperatures below 300 K. Hysteresis of the field-induced transformation shows unconventional temperature dependence: it decreases with decreasing temperature after showing a peak. Magnetic susceptibility measurement, microscopy, and X-ray diffraction data suggest a model incorporating the magnetic anisotropy and Zeeman energy in two variants, which qualitatively explains the thermal and the magnetic field history dependence of the hysteresis in these alloys.",

keywords = "Heusler alloy, High magnetic field, Hysteresis, Martensitic transformation",

author = "T. Kihara and X. Xu and A. Miyake and Y. Kinoshita and M. Tokunaga and Y. Adachi and T. Kanomata",

note = "Funding Information: This work was partly supported by the Ministry of Education, Culture, Sports, Science, and Technology, Japan, through a Grant-in-Aid for Early Career Scientist (Grant No. 18K13979 ). Some of this work was performed through the joint research with the Institute for Solid State Physics, The University of Tokyo. Funding Information: This work was partly supported by the Ministry of Education, Culture, Sports, Science, and Technology, Japan, through a Grant-in-Aid for Early Career Scientist(Grant No. 18K13979). Some of this work was performed through the joint research with the Institute for Solid State Physics, The University of Tokyo. Publisher Copyright: {\textcopyright} 2020 Acta Materialia Inc.",

year = "2020",

month = may,

doi = "10.1016/j.scriptamat.2020.02.009",

language = "English",

volume = "181",

pages = "25--29",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Elsevier Limited",

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TY - JOUR

T1 - High-field magnetization and magnetic phase diagram of metamagnetic shape memory alloys Ni50 − xCoxMn31.5Ga18.5 ( x = 9 and 9.7)

AU - Kihara, T.

AU - Xu, X.

AU - Miyake, A.

AU - Kinoshita, Y.

AU - Tokunaga, M.

AU - Adachi, Y.

AU - Kanomata, T.

N1 - Funding Information: This work was partly supported by the Ministry of Education, Culture, Sports, Science, and Technology, Japan, through a Grant-in-Aid for Early Career Scientist (Grant No. 18K13979 ). Some of this work was performed through the joint research with the Institute for Solid State Physics, The University of Tokyo. Funding Information: This work was partly supported by the Ministry of Education, Culture, Sports, Science, and Technology, Japan, through a Grant-in-Aid for Early Career Scientist(Grant No. 18K13979). Some of this work was performed through the joint research with the Institute for Solid State Physics, The University of Tokyo. Publisher Copyright: © 2020 Acta Materialia Inc.

PY - 2020/5

Y1 - 2020/5

N2 - Magnetic phase diagrams of the metamagnetic shape memory alloys Ni50-xCoxMn31.5Ga18.5 (x = 9 and 9.7) were produced from high-field magnetization measurements up to 56 T. For both compounds, magnetic field induced martensitic transformations are observed at various temperatures below 300 K. Hysteresis of the field-induced transformation shows unconventional temperature dependence: it decreases with decreasing temperature after showing a peak. Magnetic susceptibility measurement, microscopy, and X-ray diffraction data suggest a model incorporating the magnetic anisotropy and Zeeman energy in two variants, which qualitatively explains the thermal and the magnetic field history dependence of the hysteresis in these alloys.

AB - Magnetic phase diagrams of the metamagnetic shape memory alloys Ni50-xCoxMn31.5Ga18.5 (x = 9 and 9.7) were produced from high-field magnetization measurements up to 56 T. For both compounds, magnetic field induced martensitic transformations are observed at various temperatures below 300 K. Hysteresis of the field-induced transformation shows unconventional temperature dependence: it decreases with decreasing temperature after showing a peak. Magnetic susceptibility measurement, microscopy, and X-ray diffraction data suggest a model incorporating the magnetic anisotropy and Zeeman energy in two variants, which qualitatively explains the thermal and the magnetic field history dependence of the hysteresis in these alloys.

KW - Heusler alloy

KW - High magnetic field

KW - Hysteresis

KW - Martensitic transformation

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