Taniguchi Kouji, Nishio Masaki, Abe Nobuyuki, Huang Po-Jung, Kimura Shojiro, Arima Taka-Hisa, Miyasaka Hitoshi
Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.
PRESTO, Japan Science and Technology Agency (JST), 5-3 Yonbancho, Chiyoda-ku, Tokyo, 102-8666, Japan.
Angew Chem Int Ed Engl. 2021 Jun 21;60(26):14350-14354. doi: 10.1002/anie.202103121. Epub 2021 May 24.
Two-dimensional organic-inorganic hybrid perovskites (2D-OIHPs) are attracting interest due to their structural tunability and rich functional characteristics, such as ferroelectricity and ferromagnetism. Here, we report the chiral-polar ferromagnetic 2D-OIHP copper chlorides with discernable electric polarization in the inorganic layers. In these systems, the magneto-electric (ME) correlation has been clearly observed by measuring a magneto-electric directional anisotropy (MEA), in which an optical absorption coefficient changes with reversal of the light propagating direction. We have found that the MEA can be induced by a low magnetic field of about 50 mT, reflecting soft magnetic nature. The present results suggest a new paradigm for designing functional ME multiferroics, which effectively couples magnetic and electric properties.
二维有机-无机杂化钙钛矿（2D-OIHPs）因其结构可调和丰富的功能特性（如铁电性和铁磁性）而备受关注。在此，我们报道了在无机层中具有可分辨极化的手性-极性铁磁2D-OIHP氯化铜。在这些体系中，通过测量磁电方向各向异性（MEA）清晰地观察到了磁电（ME）相关性，其中光吸收系数随光传播方向的反转而变化。我们发现，MEA可由约50 mT的低磁场诱导，这反映了软磁特性。目前的结果为设计有效耦合磁性能和电性能的功能性ME多铁性材料提供了一种新范式。
