Cellular microstructures superposed on martensite plates in Mn55.2Ga19.0Cu25.8 alloy showing large coercivity

R. Sawada; T. Yamamoto; K. Minakuchi; M. Nagasako; Y. Hayasaka; K. Niitsu; Y. Cho; R. Kainuma; Y. Murakami

doi:10.1016/j.scriptamat.2017.03.013

Cellular microstructures superposed on martensite plates in Mn_55.2Ga_19.0Cu_25.8 alloy showing large coercivity

R. Sawada, T. Yamamoto, K. Minakuchi, M. Nagasako, Y. Hayasaka, K. Niitsu, Y. Cho, R. Kainuma, Y. Murakami

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

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Abstract

The microstructure in a Mn_55.2Ga_19.0Cu_25.8 alloy that exhibits both martensitic and diffusional phase transformations was examined by electron microscopy, and the potential effects of these transformations on the large coercivity (~ 2 T) were discussed. The alloy showed a cellular microstructure, composed of a cuboidal matrix enveloped by a boundary phase, and superposed on well-defined martensite plates. Since the boundary phase is enriched by the non-magnetic element Cu, it may serve as magnetic isolation for the matrix region with a face centered tetragonal lattice formed by the martensitic transformation, or offer potential pinning sites for magnetic domain walls.

Original language	English
Pages (from-to)	33-36
Number of pages	4
Journal	Scripta Materialia
Volume	135
DOIs	https://doi.org/10.1016/j.scriptamat.2017.03.013
Publication status	Published - Jul 1 2017

All Science Journal Classification (ASJC) codes

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

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10.1016/j.scriptamat.2017.03.013

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@article{a3b4ab23d5fc4315acea386ac6c8a2f8,

title = "Cellular microstructures superposed on martensite plates in Mn55.2Ga19.0Cu25.8 alloy showing large coercivity",

abstract = "The microstructure in a Mn55.2Ga19.0Cu25.8 alloy that exhibits both martensitic and diffusional phase transformations was examined by electron microscopy, and the potential effects of these transformations on the large coercivity (~ 2 T) were discussed. The alloy showed a cellular microstructure, composed of a cuboidal matrix enveloped by a boundary phase, and superposed on well-defined martensite plates. Since the boundary phase is enriched by the non-magnetic element Cu, it may serve as magnetic isolation for the matrix region with a face centered tetragonal lattice formed by the martensitic transformation, or offer potential pinning sites for magnetic domain walls.",

author = "R. Sawada and T. Yamamoto and K. Minakuchi and M. Nagasako and Y. Hayasaka and K. Niitsu and Y. Cho and R. Kainuma and Y. Murakami",

note = "Funding Information: The authors are grateful to Professors S. Hata and H. Saito for useful discussions on the analysis of the crystallographic microstructure. This study was supported by JST, CREST and a grant-in-aid from the Japan Society for the Promotion of Science (JSPS) (15H04112). Publisher Copyright: {\textcopyright} 2017 Acta Materialia Inc.",

year = "2017",

month = jul,

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doi = "10.1016/j.scriptamat.2017.03.013",

language = "English",

volume = "135",

pages = "33--36",

journal = "Scripta Materialia",

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TY - JOUR

T1 - Cellular microstructures superposed on martensite plates in Mn55.2Ga19.0Cu25.8 alloy showing large coercivity

AU - Sawada, R.

AU - Yamamoto, T.

AU - Minakuchi, K.

AU - Nagasako, M.

AU - Hayasaka, Y.

AU - Niitsu, K.

AU - Cho, Y.

AU - Kainuma, R.

AU - Murakami, Y.

N1 - Funding Information: The authors are grateful to Professors S. Hata and H. Saito for useful discussions on the analysis of the crystallographic microstructure. This study was supported by JST, CREST and a grant-in-aid from the Japan Society for the Promotion of Science (JSPS) (15H04112). Publisher Copyright: © 2017 Acta Materialia Inc.

PY - 2017/7/1

Y1 - 2017/7/1

N2 - The microstructure in a Mn55.2Ga19.0Cu25.8 alloy that exhibits both martensitic and diffusional phase transformations was examined by electron microscopy, and the potential effects of these transformations on the large coercivity (~ 2 T) were discussed. The alloy showed a cellular microstructure, composed of a cuboidal matrix enveloped by a boundary phase, and superposed on well-defined martensite plates. Since the boundary phase is enriched by the non-magnetic element Cu, it may serve as magnetic isolation for the matrix region with a face centered tetragonal lattice formed by the martensitic transformation, or offer potential pinning sites for magnetic domain walls.

AB - The microstructure in a Mn55.2Ga19.0Cu25.8 alloy that exhibits both martensitic and diffusional phase transformations was examined by electron microscopy, and the potential effects of these transformations on the large coercivity (~ 2 T) were discussed. The alloy showed a cellular microstructure, composed of a cuboidal matrix enveloped by a boundary phase, and superposed on well-defined martensite plates. Since the boundary phase is enriched by the non-magnetic element Cu, it may serve as magnetic isolation for the matrix region with a face centered tetragonal lattice formed by the martensitic transformation, or offer potential pinning sites for magnetic domain walls.

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U2 - 10.1016/j.scriptamat.2017.03.013

DO - 10.1016/j.scriptamat.2017.03.013

M3 - Article

AN - SCOPUS:85016158576

SN - 1359-6462

VL - 135

SP - 33

EP - 36

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Cellular microstructures superposed on martensite plates in Mn_55.2Ga_19.0Cu_25.8 alloy showing large coercivity

Abstract

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