NMR Study of the Magnetic Phase of EuSe

Abstract

The Eu 153 NMR in EuSe has been observed as a function of temperature and applied magnetic field. NMR results in zero applied field support the magnetic structure proposed by Fischer et al. ; EuSe has a structure of the NNSS-type in the antiferromagnetic region (from 4.6 K down to about 2.5 K) and a structure in which there coexist the NNS-and NSNS-types in the ferrimagnetic region (below about 2.5 K). As the applied field is increased, the zerofield magnetic structure changes into an intermediate one and finally into the ferromagnetic one (NNN). The coexistence of a canted spin structure and a ferrimagnetic one is proposed for the intermediate phase.