Abstract
The magnetic properties of the YbCrO 4 oxide have been studied by both bulk magnetic measurements and 170Yb Mössbauer spectroscopy. Ferrimagnetic ordering is shown to be present below 25 K, driven by the exchange within the chromium sublattice. In the saturation state, the magnetic moment is 0.55 μ B for Yb 3+, and presumably 1 μ B for Cr 5+, the two sublattices being antiferromagnetically coupled. The anisotropic Yb–Cr exchange polarises the Yb 3+ sublattice below 25 K, so as to force the Yb magnetic moments to lie in the hard magnetic a– b plane.
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