Suppression of ferromagnetism within antiphase boundaries in Ni 50Mn25Al12.5Ga12.5 alloy

Y. Murakami; T. Yano; R. Y. Umetsu; R. Kainuma; D. Shindo

doi:10.1016/j.scriptamat.2011.08.003

Suppression of ferromagnetism within antiphase boundaries in Ni ₅₀Mn₂₅Al_12.5Ga_12.5 alloy

Y. Murakami, T. Yano, R. Y. Umetsu, R. Kainuma, D. Shindo

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

11 Citations (Scopus)

Abstract

This paper reports on the unexpectedly narrow magnetic domain walls observed at the positions of antiphase boundaries (APB) in a system of ferromagnetic shape memory alloys Ni₅₀Mn₂₅Al _12.5Ga_12.5. Lorentz microscopy observations determined the wall width at the APB position to be 12 nm, which is substantially smaller than the width at the APB-free position of 48 nm. This result can be explained by the modulation of magnetic parameters near APB, within which ferromagnetism is suppressed by the deterioration of Heusler-type ordering.

Original language	English
Pages (from-to)	895-898
Number of pages	4
Journal	Scripta Materialia
Volume	65
Issue number	10
DOIs	https://doi.org/10.1016/j.scriptamat.2011.08.003
Publication status	Published - 2011 Nov

Keywords

Lorentz microscopy
Magnetic domain
Order-disorder phenomena
Shape memory alloys
Transmission electron microscopy

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.2011.08.003

Cite this

@article{62bccbc62b044de99420822c28937bfd,

title = "Suppression of ferromagnetism within antiphase boundaries in Ni 50Mn25Al12.5Ga12.5 alloy",

abstract = "This paper reports on the unexpectedly narrow magnetic domain walls observed at the positions of antiphase boundaries (APB) in a system of ferromagnetic shape memory alloys Ni50Mn25Al 12.5Ga12.5. Lorentz microscopy observations determined the wall width at the APB position to be 12 nm, which is substantially smaller than the width at the APB-free position of 48 nm. This result can be explained by the modulation of magnetic parameters near APB, within which ferromagnetism is suppressed by the deterioration of Heusler-type ordering.",

keywords = "Lorentz microscopy, Magnetic domain, Order-disorder phenomena, Shape memory alloys, Transmission electron microscopy",

author = "Y. Murakami and T. Yano and Umetsu, {R. Y.} and R. Kainuma and D. Shindo",

note = "Funding Information: This study was partly supported by Grants-in-Aid for Scientific Research (S) and Scientific Research (B) from JSPS , and Global COE Program “Materials Integration (International Center of Education and Research), Tohoku University” from MEXT .",

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doi = "10.1016/j.scriptamat.2011.08.003",

language = "English",

volume = "65",

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journal = "Scripta Materialia",

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T1 - Suppression of ferromagnetism within antiphase boundaries in Ni 50Mn25Al12.5Ga12.5 alloy

AU - Murakami, Y.

AU - Yano, T.

AU - Umetsu, R. Y.

AU - Kainuma, R.

AU - Shindo, D.

N1 - Funding Information: This study was partly supported by Grants-in-Aid for Scientific Research (S) and Scientific Research (B) from JSPS , and Global COE Program “Materials Integration (International Center of Education and Research), Tohoku University” from MEXT .

PY - 2011/11

Y1 - 2011/11

N2 - This paper reports on the unexpectedly narrow magnetic domain walls observed at the positions of antiphase boundaries (APB) in a system of ferromagnetic shape memory alloys Ni50Mn25Al 12.5Ga12.5. Lorentz microscopy observations determined the wall width at the APB position to be 12 nm, which is substantially smaller than the width at the APB-free position of 48 nm. This result can be explained by the modulation of magnetic parameters near APB, within which ferromagnetism is suppressed by the deterioration of Heusler-type ordering.

AB - This paper reports on the unexpectedly narrow magnetic domain walls observed at the positions of antiphase boundaries (APB) in a system of ferromagnetic shape memory alloys Ni50Mn25Al 12.5Ga12.5. Lorentz microscopy observations determined the wall width at the APB position to be 12 nm, which is substantially smaller than the width at the APB-free position of 48 nm. This result can be explained by the modulation of magnetic parameters near APB, within which ferromagnetism is suppressed by the deterioration of Heusler-type ordering.

KW - Lorentz microscopy

KW - Magnetic domain

KW - Order-disorder phenomena

KW - Shape memory alloys

KW - Transmission electron microscopy

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