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Comparative Study of Potentially J eff = 0 Ground State Iridium(V) in SrLaNiIrO 6 , SrLaMgIrO 6 , and SrLaZnIrO 6
Author(s) -
Wolff Klaus K.,
Agrestini Stefano,
Tanaka Arata,
Jansen Martin,
Tjeng Liu Hao
Publication year - 2017
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201700386
Subject(s) - antiferromagnetism , paramagnetism , ground state , iridium , magnetic susceptibility , crystallography , ion , crystallite , chemistry , condensed matter physics , materials science , physics , atomic physics , organic chemistry , biochemistry , catalysis
A series of polycrystalline double perovskites SrLa B IrO 6 ( B = Ni, Mg, Zn) containing Ir 5+ (5d 4 ) was synthesized by solid state reactions, and structural, magnetic and electronic properties were investigated. The isotypic fully ordered double perovskites crystallize in space group P 2 1 / n and show semiconducting behavior with estimated bandgaps of approximately 0.2 eV for SrLaNiIrO 6 and SrLaZnIrO 6 , and 0.4 eV for SrLaMgIrO 6 . SrLaNiIrO 6 is an antiferromagnet with a Néel temperature of 74 K ( μ eff = 3.3 μ B , θ W = –90 K), whereas SrLaMgIrO 6 and SrLaZnIrO 6 are weakly paramagnetic. All title compounds exhibit a temperature‐independent contribution to the measured magnetic susceptibility, which supports the notion for a van‐Vleck‐type response originating from the Ir 5+ (5d 4 , J eff = 0) ions.