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Anomalous High‐Temperature EPR Linewidths in the Spinel Solid Solution Cu 2 x Cr 2 x Sn 2−2 x S 4
Author(s) -
Colombet P.,
Glaunsinger W. S.
Publication year - 1985
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221280117
Subject(s) - antiferromagnetism , spinel , electron paramagnetic resonance , condensed matter physics , atmospheric temperature range , ion , spin glass , paramagnetism , ferromagnetism , materials science , chemistry , nuclear magnetic resonance , physics , organic chemistry , meteorology , metallurgy
The spinel spin‐glasses Cu 2 x Cr 2 x Sb 2−2 x S 4 are studied by electron paramagnetic resonance in the temperature range 4 to 560 K. The linewidths at high temperatures are much larger than expected from magnetic measurements, and for 0.25 ≦ x ≦ 0.50 the linewidths are effectively dipolar although the lineshape is Lorentzian. The experimental and estimated exchange‐narrowed line‐widths at high temperatures are then compared for ferromagnetic‐antiferromagnetic and predominantly antiferromagnetic insulating spin‐glasses in which the magnetic ions occupy face‐centered‐cubic lattice sites or B‐sites of the spinel structure.