Orbital dependent magnetic exchange interaction in CeX${}_{\text{c}}$ (X${}_{\text{c}}$=S, Se, Te)

Abstract

Dispersion relations of the crystal-field excitations in cubic antiferromagnets CeTe, CeSe, and CeS have been investigated by inelastic neutron scattering using single crystalline samples. The Fourier transform of the magnetic exchange interaction $J(q)$ obtained from the crystal-field dispersion is largely different from that of the mean-field interaction obtained from the Néel temperature and the Weiss temperature. From detailed reexamination of the magnetic susceptibility and these $J(q)$ relations, we conclude that the magnetic exchange interaction is dependent on the crystal-field levels. The interaction associated with the ${\Gamma }_8$ excited state is stronger than that with the ${\Gamma }_7$ ground state.

6 pages, 3 figures, proceedings of SCES2019

References in corpus (1)

• Kondo effect in CeX${}_c$ (X${}_c$=S, Se, Te) studied by electrical resistivity under high pressure