Magnetization Measurement of EuSe Single Crystal

Abstract

From detailed magnetization measurements, it becomes clear in the NNS state of EuSe that N and S-site spins form a canted state for applied field inclined from the (111) plane. From this canting angle, we can estimate the biquadratic interaction j₁. Transition fields, H₂ and H₃, together with the paramagnetic Curie temperature, give the values of J₁, J₂ and J₃ definitely. Using these values, we calculate the anisotropic magnetization process in excellent agreement with experiment. Zero point reductions of magnetization both in NNS and NNN states are observed to be large. Moreover, the field and the temperature dependences of the magnetization in the NNN region are large. Introducing the pseudo-dipole term, we calculate the zero point reduction in the NNN state consistently with the observed one. Softening of the magnon is the origin of the unusual behaviour of the magnetization.