Investigation of Magnetic Ordering in RCo12B6 (R = Y, Nd) by 57Fe Mössbauer Spectroscopy

Abstract

Mossbauer spectra of YC012B6 and NdCo12B6 doped with enriched 57Fe have been obtained at various temperatures between 4·2 K and room temperature. The spectrum of YC012B6 at 4·2 K indicates that the Co sublattice orders in the crystallographic basal plane. NdCo12B6 orders along or close to the crystallographic c-axis at 4·2 K and undergoes a spin-reorientation with increasing temperature until at ~55 K the magnetisation lies in or near the basal plane.