Analysis on an abnormal behavior of magnetization in neodymium trifluoride at low temperatures

Abstract An abnormal phenomenon is experimentally found that the saturation magnetization in NdF 3 drops with decreasing temperatures in high magnetic fields by Guillot. In this paper, by studying the magnetic and magneto-optical properties, a thorough explanation is presented by a two-sublattice model. Our theory points out that the abnormal magnetic behavior mainly originates from the vibration of the exchange interaction between two Nd sublattices in NdF 3 . And, the saturation characteristic of magnetization is theoretically explored at different temperatures under extremely high magnetic fields. Meanwhile, the magnetic moments of the two sublattices A and B are discussed. Based on the conclusions of the magneto-optical experiments, it further implies that light irradiation can affect the magnetic properties in NdF 3 . And, the corresponding physical mechanism is revealed.