Journal
INORGANIC CHEMISTRY
Volume 52, Issue 24, Pages 14108-14115Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic401917h
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Funding
- World Premier International Research Center Initiative (WPI Initiative, MEXT, Japan)
- Japan Society for the Promotion of Science (JSPS) through its Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program)
- JSPS of Japan [22246083, 21540330]
- NSFC [10904092]
- Grants-in-Aid for Scientific Research [21540330] Funding Source: KAKEN
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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 P2(1)/n (No. 14, cell choice 2), Z = 2, a = 5.13520(1) angstrom, b = 5.33728(1) angstrom, c = 7.54559(4) angstrom, and beta = 90.1343(1)degrees. 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 Neel 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-Goodenough 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-ferromagnetic 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.
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