Journal
INORGANIC CHEMISTRY
Volume 60, Issue 2, Pages 1242-1248Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.0c03402
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Funding
- U.S. Department of Energy (DOE), Office of Science, Basic Energy Science (BES), as a part of the Computational Materials Science Program through the Center for Computational Design of Functional Strongly Correlated Materials and Theoretical Spectroscopy
- DOE BES [DE-SC0012704]
- MOST of China [2018YFA03057001, 2017YFB0405703]
- NSF of China [11974407]
- Youth Innovation Promotion Association of CAS
- [NSF-DMR-1507252]
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The study successfully synthesized the double perovskite Ba2NiIrO6 and found that it exhibits antiferromagnetic order, although ferromagnetic interactions are dominant.
Double perovskite oxides with d(8)-d(3) electronic configurations are expected to be ferromagnetic from the Goodenough-Kanamori rules, such as ferromagnetic La2NiMnO6. In search of new ferromagnetic insulators, double perovskite Ba2NiIrO6 was successfully synthesized by high-pressure and high-temperature methods (8 GPa and 1573 K). Ba2NiIrO6 crystallizes in a cubic double perovskite structure (space group: Fm (3) over barm), with an ordered arrangement of NiO6 and IrO6 octahedra. X-ray absorption near-edge spectroscopy confirms the nominal Ni(II) and Ir(VI) valence states. Ba2NiIrO6 displays an antiferromagnetic order at 51 K. The positive Weiss temperature, however, indicates that ferromagnetic interactions are dominant. Isothermal magnetization curves at low temperatures support a field-induced spin-flop transition.
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