Feng Hai L, Deng Zheng, Wu Meixia, Croft Mark, Lapidus Saul H, Liu Sizhan, Tyson Trevor A, Ravel Bruce D, Quackenbush Nicholas F, Frank Corey E, Jin Changqing, Li Man-Rong, Walker David, Greenblatt Martha
Department of Chemistry and Chemical Biology , Rutgers, The State University of New Jersey , 610 Taylor Road , Piscataway , New Jersey 08854 , United States.
Institute of Physics, School of Physics , University of Chinese Academy of Sciences, Chinese Academy of Sciences , P. O. Box 603, Beijing 100190 , China.
Inorg Chem. 2019 Jan 7;58(1):397-404. doi: 10.1021/acs.inorgchem.8b02557. Epub 2018 Dec 17.
Double-perovskite LuNiIrO was synthesized at high pressure (6 GPa) and high temperature (1300 °C). Synchrotron powder X-ray diffraction indicates that its structure is a monoclinic double perovskite (space group P2/ n) with a small, 11% Ni/Ir antisite disorder. X-ray absorption near-edge spectroscopy measurements established Ni and Ir formal oxidation states. Magnetic studies indicate a ferrimagnetic transition at 207 K. The low-temperature magnetization curve of LuNiIrO 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/5d double-perovskite oxides.
双钙钛矿型LuNiIrO是在高压（6吉帕斯卡）和高温（1300℃）下合成的。同步辐射粉末X射线衍射表明其结构为单斜双钙钛矿（空间群P2/n），具有11%的少量Ni/Ir反位无序。X射线吸收近边光谱测量确定了Ni和Ir的形式氧化态。磁性研究表明在207K发生亚铁磁转变。LuNiIrO的低温磁化曲线具有宽磁滞，矫顽场高达48千奥斯特。这些结果促使人们在3d/5d双钙钛矿氧化物类别中寻找硬磁体。
