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Knowledge of the magnetic domain is indispensable for understanding the magnetostatic properties of magnets. However, to date, the magnetic domain has not yet been reported in the field of molecule-based magnets. Herein, we study the magnetic domains of molecule-based magnets. Two magnetic films of iron/chromium hexacyanidochromate FexCr1−x[Cr-(CN)6]2/3・5H2O (x = 0; Film 1 and x = 0.2; Film 2) were prepared for investigation. The temperature evolution of surface magnetization was measured using magnetic force microscopy. Film 1 showed a magnetic domain below Curie temperature (TC) and its positive-magnetic polarization increased monotonously with decreasing temperature, while Film 2 showed positive magnetic polarization below TC and switches from positive to negative magnetization through a demagnetization state at 146 K. This study originally reports the temperature variation of the magnetization state at the magnetization reversal. The magnetic domains appeared as a maze pattern with an approximate domain size of one-to-several micrometers. This work shows that research on molecule-based magnets can be expanded from magnetochemistry to the magnetostatic engineering of bulk magnets, molecule-based magnetostatic engineering.

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  This document is the Accepted Manuscript version of a Published Work that appeared in final form in Direct Observation of Magnetic Domain and Magnetization Reversal on Prussian Blue-Based Magnetic Films, copyright © 2023 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/jacs.3c04369

Keyword: molecule-based magnets, compensation temperature, iron/chromium hexacyanidochromate, Prussian blue analogues, magnetic domain, magnetization reversal

Date published: 2023-10-25

Publisher: American Chemical Society (ACS)

Journal:

• Journal of the American Chemical Society (ISSN: 15205126) vol. 145 issue. 42 p. 22934-22944

Funding:

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4257

First published URL: https://doi.org/10.1021/jacs.3c04369

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Updated at: 2024-10-13 08:30:32 +0900

Published on MDR: 2024-10-13 08:30:32 +0900