High-Pressure Synthesis, Crystal Structure, and Properties of In2NiMnO6 with Antiferromagnetic Order and Field-Induced Phase Transition

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• 作者：Wei Yi ; Qifeng Liang ; Yoshitaka Matsushita ; Masahiko Tanaka ; Alexei A. Belik
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：December 16, 2013
• 年：2013
• 卷：52
• 期：24
• 页码：14108-14115
• 全文大小：462K
• 年卷期：v.52,no.24(December 16, 2013)
• ISSN：1520-510X

文摘

In₂NiMnO₆, a new compound extending the family of double rare-earth perovskites R₂NiMnO₆ (R = rare earth, Y) to smaller R ions, was prepared using a high-pressure and high-temperature technique (6 GPa and 1600 K). Its crystal structure was investigated by synchrotron X-ray powder diffraction at room temperature: space group P2₁/n (No. 14, cell choice 2), Z = 2, a = 5.13520(1) 脜, b = 5.33728(1) 脜, c = 7.54559(4) 脜, and 尾 = 90.1343(1)掳. A significant degree of ordering of Mn⁴⁺ and Ni²⁺ ions was observed. The dc and ac magnetization and specific heat measurements showed that In₂NiMnO₆ is an antiferromagnet with a N茅el temperature T_N of 26 K. Its antiferromagnetism puts it apart from other members of the R₂NiMnO₆ family where a ferromagnetic ground state was observed, which is attributed to the superexchange interaction between Mn⁴⁺ and Ni²⁺ ions according to the Kanamori鈥揋oodenough rules. A field-induced phase transition to a ferromagnetic state was observed from 18 kOe at 5 K, indicating that In₂NiMnO₆ is close to the antiferromagnetic鈥揻erromagnetic transition boundary. First-principles calculations allowed us to explain its antiferromagnetism and the field-induced phase transition and predict the E* type antiferromagnetic ground state.