The origin and magnitude of a paramagnetic contribution to the CuO susceptibility at T<150 K are studied by analysing electron paramagnetic resonance and static magnetic susceptibility measurements carried out on a set of CuO single crystals. This has allowed the authors to confirm a previous supposition about the behaviour of the susceptibility for T<150 K. The asymptotic finite value of the susceptibility in the antiferromagnetic phase is also discussed by means of a crystal-field calculation which seems to rule out contributions to the local magnetic moments from incompletely quenched orbital angular moments of the Cu2+ ions. Preliminary magnetization measurements suggest the presence of weak ferromagnetism, which may explain the unusual behaviour of the CuO susceptibility.
Azzoni, C., Paleari, A., Parravicini, G. (1992). On the low-temperature magnetic properties of CuO single crystals. JOURNAL OF PHYSICS. CONDENSED MATTER, 4(5), 1359-1366 [10.1088/0953-8984/4/5/015].
On the low-temperature magnetic properties of CuO single crystals
PALEARI, ALBERTO MARIA FELICE;
1992
Abstract
The origin and magnitude of a paramagnetic contribution to the CuO susceptibility at T<150 K are studied by analysing electron paramagnetic resonance and static magnetic susceptibility measurements carried out on a set of CuO single crystals. This has allowed the authors to confirm a previous supposition about the behaviour of the susceptibility for T<150 K. The asymptotic finite value of the susceptibility in the antiferromagnetic phase is also discussed by means of a crystal-field calculation which seems to rule out contributions to the local magnetic moments from incompletely quenched orbital angular moments of the Cu2+ ions. Preliminary magnetization measurements suggest the presence of weak ferromagnetism, which may explain the unusual behaviour of the CuO susceptibility.
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