Magnetic compensation effect and phase reversal of exchange bias field across compensation temperature in multiferroic Co(Cr0.95Fe0.05)2O4

摘要

The multiferroic compound, Co(Cr0.95Fe0.05)2O4, displays reversal in the orientation of magnetic moments along with negative magnetization due to an underlying magnetic compensation phenomenon, which was earlier not noticed in the parent compound of CoCr2O4. This is one of the compounds with spinel structure where the exchange bias field changes sign across the compensation temperature and therefore has the potential attribute to get tuned in a preselected manner. In this letter, we shall elucidate the sign reversal of the exchange bias on the premise of the sign reversal of the magnetic moments, which is confirmed by the specific heat measurements.