High Magnetic Hardness for the Canted Antiferromagnetic, Ferroelectric, and Ferroelastic Layered Perovskite-like (C2H5NH3)2[FeIICl4]
作者： Jing Han , Sadafumi Nishihara , Katsuya Inoue , Mohamedally Kurmoo
DOI: 10.1021/IC5030229
关键词:
摘要: An unusual high magnetic hardness for the layered perovskite-like (C2H5NH3)2[FeIICl4], in addition to its already found canted antiferromagnetism, ferroelasticity, and ferroelectricity, which are absent (CH3NH3)2[FeIICl4], has been observed. The additional CH2 ethylammonium compared methylammonium allows more degrees of freedom therefore numerous phase transitions have characterized by single-crystal structure determinations from 383 10 K giving sequence tetragonal orthorhombic monoclinic (I4/mmm ↔ P42/ncm Pccn Pcab C2/c) accompanied both tilting rotation FeCl6 octahedra. properties on single crystal powder samples at temperature similar compounds, but TN (C2H5NH3)2[FeIICl4] is a proper antiferromagnet unlike hidden canting observed (CH3NH3)2[FeIICl4]. angle 0.6° toward c-axis, thus moments lie easy plane iron-chloride layer defined critical ...
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