Anisotropic magnetic properties and giant rotating magnetocaloric effect in double-perovskite Tb2CoMnO6

Abstract

We investigated the anisotropy of the magnetic and magnetocaloric properties of singlecrystalline double perovskite Tb2CoMnO6, which crystallizes in a monoclinic P21/n structure. Due to dissimilar magnetic anisotropy, the ferromagnetic order of the Co2+ and Mn4+ moments emerges along the c-axis at TC = 100 K, and the larger Tb3+ moments align perpendicular to the c-axis, below TTb = 15 K. The intricate temperature development of the metamagnetism along the c-axis results in a large negative change in the magnetic entropy at low temperature. On the other hand, the larger but almost reversible magnetization, perpendicular to the c-axis, results in a small and positive entropy change. This highly anisotropic magnetocaloric effect (MCE) leads to a giant rotational MCE, estimated to be 20.8 J/kg K. Our findings, based on the magnetic anisotropy in Tb2CoMnO6, enrich fundamental and applied research on magnetic materials, considering the distinct magnetic characteristics of double perovskites.

References in corpus (2)

• Exchange bias and memory effect in Sr${}_2$FeCoO${}_6$
• Electric polarization observed in single crystals of multiferroic Lu2MnCoO6

Cited by in corpus (9)

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• Magneto-dielectric Effect in Relaxor Dipolar Glassy Tb2CoMnO6 Film
• Physical Properties of Nano-crystalline Sm${}_2$CoMnO${}_6$: structure, magnetism, spin-phonon coupling and dielectric study
• Structure, magnetic and dielectric properties in nano-crystalline Yb${}_2$CoMnO${}_6$
• Conventional and rotating magnetoelectric effect of a half-filled spin-electron model on a doubly decorated square lattice
• Rotating magnetoelectric effect in a ground state of a coupled spin-electron model on a doubly decorated square lattice