Magnetic Properties of Unusual Metal System TmS in High Magnetic Fields

Abstract

Magnetic properties of TmS have been examined in high magnetic fields by means of resistivity, specific heat and magnetization measurements using a high quality single crystal. The high-field magnetization measurements indicate that the magnetization for H || <001> is quite suppressed at high fields. The observed results can be explained reasonably by taking into consideration of O₂⁰-type ferro electric quadrupolar (FQ) interactions and the crystalline electric field effect. The new phase which has been induced by applying magnetic fields, might be ascribed to the O₂⁰-type FQ ordering. The established magnetic field-temperature phase diagram implies that the antiferromagnetic interaction and O₂⁰-type FQ interaction coexist at low temperatures.