Abstract
The magnetic properties of trigonal Nd 0.9Dy 0.1Fe 3(BO 3) 4 substituted compound with the competitive Nd–Fe and Dy–Fe exchange interactions have been investigated. It has been shown that in Nd 0.9Dy 0.1Fe 3(BO 3) 4 a spontaneous spin-reorientation transition from an ease-axis state to an easy-plane occurs near 8 K. Anomalies of the magnetization curves are observed in a spin-flop transition induced by the magnetic field B‖c. The calculations were performed using a molecular-field approximation and a crystal-field model for the rare-earth subsystem. Extensive experimental data on the magnetic properties of Nd 0.9Dy 0.1Fe 3(BO 3) 4 have been interpreted and good agreement between theory and experiment has been achieved using the obtained theoretical dependences.
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