High-Pressure Synthesis of Lu 2 NiIrO 6 with Ferrimagnetism and Large Coercivity

Hai L. Feng, Zheng Deng, Meixia Wu, Mark Croft, Saul H. Lapidus, Sizhan Liu, Trevor A. Tyson, Bruce D. Ravel, Nicholas F. Quackenbush, Corey E. Frank, Changqing Jin, Man Rong Li, David Walker, Martha Greenblatt

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10 Scopus citations

Abstract

Double-perovskite Lu 2 NiIrO 6 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 1 /n) with a small, 11% Ni/Ir antisite disorder. X-ray absorption near-edge spectroscopy measurements established Ni 2 and Ir 4 formal oxidation states. Magnetic studies indicate a ferrimagnetic transition at 207 K. The low-temperature magnetization curve of Lu 2 NiIrO 6 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.

Original languageEnglish (US)
Pages (from-to)397-404
Number of pages8
JournalInorganic Chemistry
Volume58
Issue number1
DOIs
StatePublished - Jan 7 2019

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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