关键词: 多铁性/
磁电耦合/
高压合成/
多阶有序钙钛矿
English Abstract
High pressure synthesis and physical properties of multiferroic materials with multiply-ordered perovskite structure
Zhou Long1,2,Wang Xiao1,2,
Zhang Hui-Min3,
Shen Xu-Dong1,2,
Dong Shuai3,
Long You-Wen1,2
1.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2.School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
3.Department of Physics, Southeast University, Nanjing 211189, China
Fund Project:Project supported by the National Natural Science Foundation of China (Grant Nos. 11574378, 51772324), the National Basic Research Program of China (Grant No. 2014CB921500), the National Key RD Program of China (Grant No. 2018YFA0305700), and the Chinese Academy of Sciences (Grant Nos. YZ201555, QYZDBSSW-SLH013, XDB07030300, GJHZ1773).Received Date:04 May 2018
Accepted Date:29 May 2018
Published Online:05 August 2018
Abstract:Perovskite is one of the most important material systems for magnetoelectric multiferroic study. However, multiferroic is not expected to occur in a cubic perovskite on account of the highly symmetric crystal structure. Besides, magnetoelectric multiferroics with large ferroelectric polarization and strong magnetoelectric coupling have not been found to occur simultaneously in a single-phase multiferroic material discovered so far, challenging to the potential applications of this kind of material. Here we briefly review two multiferroic materials with multiply-ordered perovskite structure synthesized under high pressure and high temperature conditions. In the cubic perovskite LaMn3Cr4O12, we observed spin-induced ferroelectric polarization, providing the first example where ferroelectric takes place in a cubic perovskite material. In another multiply-ordered provskite BiMn3Cr4O12, type-I and type-Ⅱ multiferroic phases successively developed when cooled. It provides a rare example where two different types of multiferroic phases occur subsequently so that both large polarization and strong magnetoelectric effect are achieved in a single-phase material. In addition, since double ferroelectric phases take place in BiMn3Cr4O12, one can obtain four different polarization states by adopting different poling procedures, thus opening up a new way for generating multifunctional spintronics and multistate storage devices.
Keywords: multiferroic/
magnetoelectric coupling/
high-pressure synthesis/
multiply-ordered perovskite
