Large rotating magnetocaloric effect at low magnetic fields in the Ising-like antiferromagnet DyScO3 single crystal

Abstract

DyScO3 single crystals were grown by the Czochralski method, and the magnetic properties and anisotropic magnetocaloric effect (MCE) have been investigated. It is found that DyScO3 single crystal possesses an Ising-like antiferromagnetic magnetic structure below TN ∼3.5 K with the Ising easy axes lying in the ab plane. Meanwhile the strong magnetic anisotropy was observed in DyScO3 single crystal. In the magnetic field changes of 0–20 kOe and 0–50 kOe, the maximum magnetic entropy changes of 17.04 J/kg K and 21.18 J/kg K were obtained along the b axis, with the corresponding refrigerant capacity (RC) values of 128.62 J/kg and 417.33 J/kg, respectively. With magnetic fields of only 10 kOe and 20 kOe imposed, it was noteworthy that the prominent rotating magnetic entropy changes of 8.49 J/kg K and 16.94 J/kg K at 9.5 K were observed by rotating the DyScO3 single crystal within the bc plane, respectively. The prominent low-field rotating MCE indicates DyScO3 single crystal can be used as an excellent potential candidate for low-field rotating magnetic refrigeration near the liquid helium temperature, which is a simpler way by rotating the refrigerants under a low constant magnetic field instead of the general method of changing the imposed magnetic field.