Abstract
The magnetoelectric and thermodynamic properties of multiferroic A2Cu2Mo3O12 (A=Rb and Cs) compounds are investigated through the theoretical laboratory of a frustrated one-dimensional spin chain of CuO2 ribbon where inter-chain couplings are ignored. The general framework is built under external magnetic and electric field constraints with additional anisotropies. The field scans of magnetoelectric properties highlight a set of interdependent meta-transition giving birth to the metamagnetoelectric effect. Those meta-transitions are likewise reported by typically measured field dependencies of entropy and further of heat capacity that reveals a breakdown of temperature-energy dependence during meta-transitions. The temperature-energy dependence breakdown vanishing reported for high temperature emphasizes the metamagnetoelectric state death beyond relatively low-temperature values. Furthermore, large temperature-fields dependencies are noticed except for critical values where meta-transitions are occurring in the investigated A2Cu2Mo3O12 compounds.
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