TY - JOUR
T1 - Magnetism of antiphase boundaries in ordered alloys studied using electron holography
AU - Tamaoka, Takehiro
AU - Aso, Ryotaro
AU - Murakami, Yasukazu
N1 - Funding Information:
The authors are grateful to Drs. R. Kainuma, K. Niitsu, T. Tanigaki, H. S. Park, D. Shindo, Y. Cho, and Y. Midoh for their collaboration regarding TEM studies. This work was supported in part by JST CREST (grant number JPMJCR1664 ) and JSPS KAKENHI (grant number 18H03845 ).
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/12/1
Y1 - 2021/12/1
N2 - Magnetic anomalies in antiphase boundaries (APBs), which are a type of planar defect produced in ordered crystals, have been studied using electron holography. For many ordered crystals, including a Ni50Mn25Al12.5Ga12.5 alloy with a Heusler-type structure, atomic disordering in the APB region (showing a finite thickness) deteriorates the ferromagnetic spin order. This relationship has several functions, such as the pinning of magnetic domain walls by APBs. However, in an Fe70A130 alloy with a B2-type (CsCl-type) ordered structure, ferromagnetism can be developed by APBs. The unusual relationship observed in the Fe70A130 alloy can provide useful information for engineering APB-induced phenomena. This paper reviews recent electron holography observations from these two types of alloys, and technical advancements in the APB studies.
AB - Magnetic anomalies in antiphase boundaries (APBs), which are a type of planar defect produced in ordered crystals, have been studied using electron holography. For many ordered crystals, including a Ni50Mn25Al12.5Ga12.5 alloy with a Heusler-type structure, atomic disordering in the APB region (showing a finite thickness) deteriorates the ferromagnetic spin order. This relationship has several functions, such as the pinning of magnetic domain walls by APBs. However, in an Fe70A130 alloy with a B2-type (CsCl-type) ordered structure, ferromagnetism can be developed by APBs. The unusual relationship observed in the Fe70A130 alloy can provide useful information for engineering APB-induced phenomena. This paper reviews recent electron holography observations from these two types of alloys, and technical advancements in the APB studies.
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U2 - 10.1016/j.jmmm.2021.168406
DO - 10.1016/j.jmmm.2021.168406
M3 - Article
AN - SCOPUS:85113149917
VL - 539
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
M1 - 168406
ER -