Abstract
Monoclinic single crystals of Ho 2GeO 5 were grown by a flux technique. The molar principal susceptibilities ( χ 1 and χ 3) have been measured in the temperature range 300–13.5 K. The principal magnetic anisotropies ( χ 1– χ 2, χ 2– χ 3 and χ 1– χ 3) are obtained from the measured anisotropies in different modes of suspensions ( b-axis vertical, c-axis vertical and (1 0 0) plane horizontal) of the crystal. The molar principal susceptibility ( χ 2) is obtained from the observed values of the principal anisotropies. The observed principal susceptibilities together with their anisotropies are explained by invoking the crystal field interaction of the Ho 3+ ion with its diamagnetic neighbors in non-axial symmetry. The molar susceptibilities are correlated to the ionic values by finding out the proper orientation of the principal molar susceptibilities, i.e., crystal susceptibilities with respect to that of the ionic susceptibilities ( K x , K y and K z ). The electronic heat capacities are calculated from the crystal field analysis showing Schottky type anomalies.
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