Weak Ferromagnetic Transition with a Dielectric Anomaly in Hexagonal Lu0.5Sc0.5FeO3

作者：Masuno Atsunobu^*; Ishimoto Atsushi; Moriyoshi Chikako; Hayashi Naoaki; Kawaji Hitoshi; Kuroiwa Yoshihiro; Inoue Hiroyuki

来源：Inorganic Chemistry, 2013, 52(20): 11889-11894.

DOI：10.1021/ic401482h

Lu1-xScxFeO3 (0 %26lt;= x %26lt;= 1) was synthesized by a conventional solid-state reaction. The hexagonal phase appeared at 0.4 %26lt;= x %26lt;= 0.6, between the perovskite phase (0 %26lt;= x %26lt;= 0.3) and the bixbyite phase (0.7 %26lt;= x %26lt;= 1). Structural, magnetic, and dielectric properties of hexagonal Lu0.5Sc0.5FeO3 were investigated. Synchrotron X-ray diffraction measurements revealed that the crystal structure of Lu0.5Sc0.5FeO3 is isomorphic to hexagonal ferroelectrics RMnO3 (R = rare earth ion) with a polar space group of P6(3)cm. A weak ferromagnetic transition with a dielectric anomaly occurred at a much higher temperature (162 K) than those in hexagonal RMnO3. Although remanent magnetization was observed below the transition temperature, it decreased to almost zero at 10 K These results indicate a strong antiferromagnetic interaction between ground-state Fe3+ ions on the triangular lattice.

• 出版日期2013-10-21