Magnetization reversal induced by antiphase domain boundaries in Ni2MnZ Heusler compounds

Ulrike Zweck; Pascal Neibecker; Sebastian Mühlbauer; Qiang Zhang; Pin Yi Chiu; Michael Leitner

doi:10.1103/PhysRevB.106.224106

Magnetization reversal induced by antiphase domain boundaries in Ni2MnZ Heusler compounds

Ulrike Zweck, Pascal Neibecker, Sebastian Mühlbauer, Qiang Zhang, Pin Yi Chiu, Michael Leitner

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Abstract

The correlation of the microstructure and the magnetic properties of Ni2MnAl0.5Ga0.5 and Ni2MnAl Heusler alloys is studied in samples of distinct L21 order states by neutron powder diffraction and small-angle scattering. The extracted correlation lengths of the structural and magnetic order agree over all annealing states, which implies the structural antiphase domain boundaries to be identical to the magnetic domain walls, and thus to inherently give rise to a magnetization reversal. The findings are discussed in the context of recent small-angle neutron scattering studies on related systems, and their wider implications are pointed out.

Original language	English
Article number	224106
Journal	Physical Review B
Volume	106
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.106.224106
State	Published - Dec 1 2022

Funding

Financial support by the Deutsche Forschungsgemeinschaft (Project No. 107745057, TRR 80) is gratefully acknowledged. A portion of this research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory.

Funders	Funder number
Deutsche Forschungsgemeinschaft	TRR 80, 107745057

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10.1103/PhysRevB.106.224106

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abstract = "The correlation of the microstructure and the magnetic properties of Ni2MnAl0.5Ga0.5 and Ni2MnAl Heusler alloys is studied in samples of distinct L21 order states by neutron powder diffraction and small-angle scattering. The extracted correlation lengths of the structural and magnetic order agree over all annealing states, which implies the structural antiphase domain boundaries to be identical to the magnetic domain walls, and thus to inherently give rise to a magnetization reversal. The findings are discussed in the context of recent small-angle neutron scattering studies on related systems, and their wider implications are pointed out.",

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AU - Chiu, Pin Yi

AU - Leitner, Michael

N1 - Publisher Copyright: © 2022 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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AB - The correlation of the microstructure and the magnetic properties of Ni2MnAl0.5Ga0.5 and Ni2MnAl Heusler alloys is studied in samples of distinct L21 order states by neutron powder diffraction and small-angle scattering. The extracted correlation lengths of the structural and magnetic order agree over all annealing states, which implies the structural antiphase domain boundaries to be identical to the magnetic domain walls, and thus to inherently give rise to a magnetization reversal. The findings are discussed in the context of recent small-angle neutron scattering studies on related systems, and their wider implications are pointed out.

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Magnetization reversal induced by antiphase domain boundaries in Ni2MnZ Heusler compounds

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