Magnetic and magnetocaloric properties of bulk dysprosium chromite Available to Purchase

In this work, a polycrystalline bulk DyCrO₃ sample was prepared by a solution route and the structural and magnetic properties were investigated. The phase purity and ionic valence state of the DyCrO₃ sample were determined by x-ray diffraction/Raman spectroscopy and x-ray photoelectron spectroscopy, respectively. The AC and DC magnetization measurements revealed the onset of antiferromagnetic order at 146 K with an effective moment of 8.88 μ_B. Isothermal magnetization measurements of this material are presented for the first time, showing a peak in the coercive field at 80 K that is explained by the competition between the paramagnetic Dy³⁺ and Cr³⁺ sublattices. DyCrO₃ was found to display a large magnetocaloric effect (8.4 J/kg K) and relative cooling power (217 J/kg) at 4 T applied field, which renders DyCrO₃ useful for magnetic refrigeration between 5 K and 30 K.