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Magneto‐Electric Directional Anisotropy in Polar Soft Ferromagnets of Two‐Dimensional Organic–Inorganic Hybrid Perovskites
Author(s) -
Taniguchi Kouji,
Nishio Masaki,
Abe Nobuyuki,
Huang PoJung,
Kimura Shojiro,
Arima Takahisa,
Miyasaka Hitoshi
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202103121
Subject(s) - multiferroics , ferromagnetism , condensed matter physics , ferroelectricity , polarization density , electric field , polar , materials science , anisotropy , polarization (electrochemistry) , magnetic anisotropy , magneto , magnetic field , chemistry , magnetization , magnet , physics , optoelectronics , optics , dielectric , quantum mechanics , astronomy
Abstract 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.