High-Pressure Synthesis of Lu2NiIrO6 with Ferrimagnetism and Large Coercivity

Feng HL; Deng Z; Wu MX; Croft M; Lapidus SH; Liu SZ; Tyson TA; Ravel BD; Quackenbush NF; Frank CE; Jin CQ; Li MR; Walker D; Greenblatt M

Inorganic Chemistry, Vol.58, No.1, 397-404, 2019

DOI10.1021/acs.inorgchem.8b02557 Export Citation

High-Pressure Synthesis of Lu2NiIrO6 with Ferrimagnetism and Large Coercivity

Feng HL, Deng Z, Wu MX, Croft M, Lapidus SH, Liu SZ, Tyson TA, Ravel BD, Quackenbush NF, Frank CE, Jin CQ, Li MR, Walker D, Greenblatt M

Double-perovskite Lu2NiIrO6 was synthesized at high pressure (6 GPa) and high temperature (1300 degrees C). Synchrotron powder X-ray diffraction indicates that its structure is a monoclinic double perovskite (space group P2(1)/n) with a small, 11% Ni/Ir antisite disorder. X-ray absorption near-edge spectroscopy measurements established Ni2+ and Ir4+ formal oxidation states. Magnetic studies indicate a ferrimagnetic transition at 207 K. The low temperature magnetization curve of Lu2NiIrO6 features broad hysteresis with a coercive field as high as 48 kOe. These results encourage the search for hard magnets in the class of 3d/Sd double-perovskite oxides.