Crystal-field-induced spin rotations in NdCo2and HoCo2: A Mössbauer study

Abstract
The magnetic anisotropy properties of Fe57-doped NdCo2 and HoCo2 were studied by means of Mössbauer spectroscopy in the 4.2-300 K temperature range. The experimental results indicate the presence of spin reorientations taking place at 43.5 and 16 K, for NdCo2 and HoCo2, respectively. Single-ion-model crystal-field calculations account for the experimental results and allow the determination of the crystal-field parameters.