ESR Studies on 3d Transition Metal Intercalation into Layered TiS2Crystals

Abstract

Extensive X-band ESR measurements have been made on the 3d transition metal intercalation compound M x TiS 2 (M=V, Cr, Mn, Fe, Co, Ni; 0≤ x ≤1) over the temperature range 300–77 K. The variations of the intra- and interlayer spacings with intercalation of guest atoms are presented. Fe and Ni intercalates do not show any ESR signals. Magnetic interactions are ineffective in V x TiS 2 , while in Cr x TiS 2 and Mn x TiS 2 dipolar interactions are dominant and these paramagnetic atoms undergo a thermally activated motion in the interlayers. Co x TiS 2 becomes ferromagnetic below T c (<140 K) and their temperature dependence of linewidth is very similar to those in itinerant ferromagnets like CoS 2 , suggesting the formation of a low spin state near the host Ti d-band. The anisotropies in the g -value and linewidth are notable in these layered intercalates.