Magnetoelectric coupling and its impact on the multicaloric effect

Abstract

The multicaloric effect, which represents the reversible entropy change that occurs when both external magnetic and electric fields are applied, is an interesting phenomenon characteristic to multiferroics. Targeting the multicaloric effect in the typical multiferroic (Fe$_{0.95}$Zn$_{0.05}$)$_2$Mo$_3$O$_8$, we experimentally evaluate the isothermal entropy change due to a magnetoelectric cross-correlation. A pronounced cross-correlation-derived isothermal entropy change is found at the magnetic ordering temperature. By exploring the literature, we suggest that a magnetic phase transition may tend to involve a considerably larger cross-correlation-derived entropy change than that derived from the linear magnetoelectric effect.