Interaction between magnetic domain walls and antiphase boundaries in Ni2Mn(Al,Ga) studied by electron holography and Lorentz microscopy

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

doi:10.2320/matertrans.MD200783

Interaction between magnetic domain walls and antiphase boundaries in Ni₂Mn(Al,Ga) studied by electron holography and Lorentz microscopy

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

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

18 Citations (Scopus)

Abstract

The magnetization distribution in the L2₁ phase of a Ni ₂Mn(Al,Ga) alloy, which is a type of ferromagnetic shape memory alloy, has been studied by electron holography and Lorentz microscopy. This alloy contains many antiphase boundaries (APBs), which are introduced by the chemical ordering from the B2 state to the L2₁ state. In situ Lorentz microscopy observations have revealed that APBs behave as strong pinning sites for domain wall motion. The width of a 180° wall, which was formed at the position of an APB, was estimated to be approximately 10 nm. This narrow domain wall was rationalized by the depression of ferromagnetism within APBs.

Original language	English
Pages (from-to)	2636-2641
Number of pages	6
Journal	Materials Transactions
Volume	48
Issue number	10
DOIs	https://doi.org/10.2320/matertrans.MD200783
Publication status	Published - Oct 2007
Externally published	Yes

All Science Journal Classification (ASJC) codes

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

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10.2320/matertrans.MD200783

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title = "Interaction between magnetic domain walls and antiphase boundaries in Ni2Mn(Al,Ga) studied by electron holography and Lorentz microscopy",

abstract = "The magnetization distribution in the L21 phase of a Ni 2Mn(Al,Ga) alloy, which is a type of ferromagnetic shape memory alloy, has been studied by electron holography and Lorentz microscopy. This alloy contains many antiphase boundaries (APBs), which are introduced by the chemical ordering from the B2 state to the L21 state. In situ Lorentz microscopy observations have revealed that APBs behave as strong pinning sites for domain wall motion. The width of a 180° wall, which was formed at the position of an APB, was estimated to be approximately 10 nm. This narrow domain wall was rationalized by the depression of ferromagnetism within APBs.",

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

year = "2007",

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T1 - Interaction between magnetic domain walls and antiphase boundaries in Ni2Mn(Al,Ga) studied by electron holography and Lorentz microscopy

AU - Yano, T.

AU - Murakami, Y.

AU - Kainuma, R.

AU - Shindo, D.

PY - 2007/10

Y1 - 2007/10

N2 - The magnetization distribution in the L21 phase of a Ni 2Mn(Al,Ga) alloy, which is a type of ferromagnetic shape memory alloy, has been studied by electron holography and Lorentz microscopy. This alloy contains many antiphase boundaries (APBs), which are introduced by the chemical ordering from the B2 state to the L21 state. In situ Lorentz microscopy observations have revealed that APBs behave as strong pinning sites for domain wall motion. The width of a 180° wall, which was formed at the position of an APB, was estimated to be approximately 10 nm. This narrow domain wall was rationalized by the depression of ferromagnetism within APBs.

AB - The magnetization distribution in the L21 phase of a Ni 2Mn(Al,Ga) alloy, which is a type of ferromagnetic shape memory alloy, has been studied by electron holography and Lorentz microscopy. This alloy contains many antiphase boundaries (APBs), which are introduced by the chemical ordering from the B2 state to the L21 state. In situ Lorentz microscopy observations have revealed that APBs behave as strong pinning sites for domain wall motion. The width of a 180° wall, which was formed at the position of an APB, was estimated to be approximately 10 nm. This narrow domain wall was rationalized by the depression of ferromagnetism within APBs.

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Interaction between magnetic domain walls and antiphase boundaries in Ni₂Mn(Al,Ga) studied by electron holography and Lorentz microscopy

Abstract

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