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A strain-induced phase transition is one of the noteworthy fields in materials science and condensed matter physics. Electrical and optical switching via strain-induced phase transitions at room temperature is applicable to straintronics, which is an emerging field focused on low energy operation in next-generation computing and memory devices. While strain-induced structural and magnetic transitions have been extensively investigated, real-space observations of these phase transitions are still a considerable challenge. In this study, we demonstrated the Lorentz transmission electron microscopy (L-TEM) on magnetic textures under uniaxial compressive strain. Transition behaviors of magnetic stripes are studied through the observation of a (Fe0.63Ni0.3Pd0.07)3P magnet with S4 symmetry. Our L-TEM observations, coupled with in-situ nanoindentation techniques, demonstrated a switching of the wavevector (q) of magnetic stripe domains when the strain aligns along stripes, while a direction of q doesn’t change when the strain is applied perpendicular to the stripes. These observation results agree with expected transitions by micromagnetic simulations. Moreover, calculation results by finite element method supports that the concentration of compressive stress triggers a switching of magnetic stripes. These experiments and simulations open a possibility to control the strain-induced transitions of magnetic states in electrical devices.

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  This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © 2025 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsami.5c00625.

Keyword: Dzyaloshinskii−Moriya interaction, magnetic texture, Lorentz transmission electron microscopy, wavevector switching, uniaxial strain, in situ nanoindentation

Date published: 2025-04-16

Publisher: American Chemical Society (ACS)

Journal:

• ACS Applied Materials & Interfaces (ISSN: 19448244) vol. 17 issue. 15 p. 22921-22928

Funding:

• Ministry of Education, Culture, Sports, Science and Technology JPMJCR20T1
• Ministry of Education, Culture, Sports, Science and Technology 19H00660
• Ministry of Education, Culture, Sports, Science and Technology 22K20363
• Ministry of Education, Culture, Sports, Science and Technology 23K04365
• Ministry of Education, Culture, Sports, Science and Technology 23K13639
• Ministry of Education, Culture, Sports, Science and Technology 23K26534
• Ministry of Education, Culture, Sports, Science and Technology 24H00389
• RIKEN TRIP initiative

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5790

First published URL: https://doi.org/10.1021/acsami.5c00625

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Updated at: 2025-10-03 13:59:32 +0900

Published on MDR: 2026-04-08 08:23:36 +0900