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Grain engineered polar-axis-oriented epitaxial Mn2Mo3O8 films with enhanced magnetic transition temperature
| Title: | Grain engineered polar-axis-oriented epitaxial Mn2Mo3O8 films with enhanced magnetic transition temperature |
| Authors: | Mo, Shishin Browse this author | | Katayama, Tsukasa Browse this author →KAKEN DB | | Chikamatsu, Akira Browse this author | | Hasegawa, Tetsuya Browse this author |
| Issue Date: | 16-May-2023 |
| Publisher: | Royal Society of Chemistry |
| Journal Title: | Journal of materials chemistry C |
| Publisher DOI: | 10.1039/d3tc00730h |
| Abstract: | Mn2Mo3O8 is a layered multiferroic material that exhibits unique properties such as two-dimensional magnetism, room-temperature ferroelectric order, and strong magnetoelectric coupling. However, it has a low magnetic transition temperature (T-N) of 41 K. Therefore, in this study, we grain engineered polar-axis-oriented Mn2Mo3O8 epitaxial films to enhance the T-N. Mn2Mo3O8 films were grown on yttria-stabilized zirconia (111) substrates. These films consisted of two types of hexagonal grains (G1 and G2) that were oriented at an angle of 30 degrees with respect to each other while maintaining the ferroelectric polar axis of the film along the out-of-plane direction. Such a dual grain system is a result of the layered structure of Mn2Mo3O8, in which the Mn and Mo layers are alternately stacked along the polar axis. The volume fraction of G2 was significantly affected by the film thickness and varied widely in the range 2-48%. Importantly, T-N of the grain engineered Mn2Mo3O8 films increased to 163 K with increasing the volume fraction. We speculate that this increase in T-N is due to the formation of a three-dimensional magnetic network at the grain boundaries. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/92466 |
| Appears in Collections: | 電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 片山 司
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