Study of large rotating magnetocaloric effect in strongly anisotropic double perovskite Tb2CoMnO6

The rotating magnetocaloric effect has been researched in double perovskite Tb $$_{2}$$ CoMnO $$_{6}$$ by Monte Carlo simulation. The magnetization, specific heat and isothermal entropy change are presented for magnetic fields in different directions ( $$h\parallel c$$ and $$h\perp c$$ ). The rotating magnetic entropy, transition temperature and relative cooling power are given as well. Due to the different magnetic anisotropy, the spin of Co $$^{2+}$$ /Mn $$^{4+}$$ is parallel to c axis and the spin of Tb $$^{3+}$$ is perpendicular to c axis. The corresponding A-type antiferromagnetic order appears at $$T_{C} = 94$$ K, and at $$T_{N} = 15$$ K, ferromagnetic state appears. Different orientations of spins result in a big negative and positive rotating magnetic entropy appeared in different temperature. Those findings may provide a wider temperature range for magnetic refrigeration applications.