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Multiferroic materials with ordered electric dipoles and magnetic spins attract a lot of attention from viewpoints of applications and fundamental science. Multiferroics are generally classified into type-I, where (anti)ferroelectric and magnetic transitions are well separated and have completely different origins, and type-II, where magnetic structures break crystallographic inversion symmetry. Type-III multiferroics were recently introduced, which are close to type-I, but they do not show non-polar-to-polar structural transitions as polar structures are fixed by chemical order. In this work, we describe dielectric and magnetic behaviors observed in the double perovskites, (Ca0.5Mn1.5)MnWO6 and (Ca0.3Mn1.7)MnWO6, crystallizing in space group P21/n. Dielectric constant of these compounds showed a peak at TC = 22 K and TC = 27 K, respectively, and followed the Curie-Weiss law in wide temperature ranges between TC and 300 K, where TC is an (anti)ferroelectric transition temperature – this behavior is typical for type-I multiferroics with proper (anti)ferroelectric transitions. At the same time, TC matches with the Neel temperature TN – this behavior is typical for type-II multiferroics. Therefore, materials with such behavior can be called hybrid multiferroics.

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  This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry Letters, copyright © 2024 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/acs.chemmater.4c01720

Keyword: double perovskites, multiferroics, Curie-Weiss, dielectric properties

Date published: 2024-08-13

Publisher: American Chemical Society (ACS)

Journal:

• CHEMISTRY OF MATERIALS (ISSN: 15205002) p. 7604-7609

Funding:

• Kazuchika Okura Memorial Foundation 2022-11
• Japan Society for the Promotion of Science JP22H04601

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4663

First published URL: https://doi.org/10.1021/acs.chemmater.4c01720

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Updated at: 2025-08-13 08:30:23 +0900

Published on MDR: 2025-08-13 08:17:18 +0900