Effects of the antiferromagnetic anti-phase domain boundary on the magnetization processes in Ni2Mn(Ga0.5Al0.5) Heusler alloy

R. Y. Umetsu; H. Ishikawa; K. Kobayashi; A. Fujita; K. Ishida; R. Kainuma

doi:10.1016/j.scriptamat.2011.03.014

Effects of the antiferromagnetic anti-phase domain boundary on the magnetization processes in Ni₂Mn(Ga_0.5Al_0.5) Heusler alloy

R. Y. Umetsu, H. Ishikawa, K. Kobayashi, A. Fujita, K. Ishida, R. Kainuma

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

16 Citations (Scopus)

Abstract

The effects of anti-phase domain (APD) boundaries on the magnetic properties of Ni₂Mn(Ga_0.5Al_0.5) alloy were studied by magnetic measurements and transmission electron microscopic observations. The growth of APDs at 773 K followed the square root law for annealing time. While the saturation magnetization and the Curie temperature were hardly affected by the APD size, the magnetization curve in the specimen with smaller mean APD size became harder, caused by the pinning effect of the magnetic domain walls due to the APD boundaries.

Original language	English
Pages (from-to)	41-44
Number of pages	4
Journal	Scripta Materialia
Volume	65
Issue number	1
DOIs	https://doi.org/10.1016/j.scriptamat.2011.03.014
Publication status	Published - 2011 Jun

Keywords

Annealing time
Anti-phase domain boundary
Magnetization process
NiMn(Ga,Al)
Pinning of the magnetic domain wall

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.2011.03.014

Cite this

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title = "Effects of the antiferromagnetic anti-phase domain boundary on the magnetization processes in Ni2Mn(Ga0.5Al0.5) Heusler alloy",

abstract = "The effects of anti-phase domain (APD) boundaries on the magnetic properties of Ni2Mn(Ga0.5Al0.5) alloy were studied by magnetic measurements and transmission electron microscopic observations. The growth of APDs at 773 K followed the square root law for annealing time. While the saturation magnetization and the Curie temperature were hardly affected by the APD size, the magnetization curve in the specimen with smaller mean APD size became harder, caused by the pinning effect of the magnetic domain walls due to the APD boundaries.",

keywords = "Annealing time, Anti-phase domain boundary, Magnetization process, NiMn(Ga,Al), Pinning of the magnetic domain wall",

author = "Umetsu, {R. Y.} and H. Ishikawa and K. Kobayashi and A. Fujita and K. Ishida and R. Kainuma",

note = "Funding Information: The authors are grateful to Profs. Y. Koizumi and Y. Murakami, Tohoku University, for their valuable comments. The present work was supported by Grant-in-Aids for Scientific Research, from the Japan Society for the Promotion of Science and by the Global COE Project. A part of this work was performed at the Center for Low Temperature Science, Institute for Materials Research, Tohoku University.",

year = "2011",

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doi = "10.1016/j.scriptamat.2011.03.014",

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pages = "41--44",

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T1 - Effects of the antiferromagnetic anti-phase domain boundary on the magnetization processes in Ni2Mn(Ga0.5Al0.5) Heusler alloy

AU - Umetsu, R. Y.

AU - Ishikawa, H.

AU - Kobayashi, K.

AU - Fujita, A.

AU - Ishida, K.

AU - Kainuma, R.

N1 - Funding Information: The authors are grateful to Profs. Y. Koizumi and Y. Murakami, Tohoku University, for their valuable comments. The present work was supported by Grant-in-Aids for Scientific Research, from the Japan Society for the Promotion of Science and by the Global COE Project. A part of this work was performed at the Center for Low Temperature Science, Institute for Materials Research, Tohoku University.

PY - 2011/6

Y1 - 2011/6

N2 - The effects of anti-phase domain (APD) boundaries on the magnetic properties of Ni2Mn(Ga0.5Al0.5) alloy were studied by magnetic measurements and transmission electron microscopic observations. The growth of APDs at 773 K followed the square root law for annealing time. While the saturation magnetization and the Curie temperature were hardly affected by the APD size, the magnetization curve in the specimen with smaller mean APD size became harder, caused by the pinning effect of the magnetic domain walls due to the APD boundaries.

AB - The effects of anti-phase domain (APD) boundaries on the magnetic properties of Ni2Mn(Ga0.5Al0.5) alloy were studied by magnetic measurements and transmission electron microscopic observations. The growth of APDs at 773 K followed the square root law for annealing time. While the saturation magnetization and the Curie temperature were hardly affected by the APD size, the magnetization curve in the specimen with smaller mean APD size became harder, caused by the pinning effect of the magnetic domain walls due to the APD boundaries.

KW - Annealing time

KW - Anti-phase domain boundary

KW - Magnetization process

KW - NiMn(Ga,Al)

KW - Pinning of the magnetic domain wall

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