Abstract
Room-temperature tunable bipolar magnetization switching and magnetically switchable magnetocaloric phenomena having numerous application potentials are reported in ( and 0.60) polycrystalline samples. Substitution of Fe in antiferromagnetic induces a first-order spin-reorientation transition , which along with antiferromagnetic ordering transition gives rise to anomalies in dielectric spectra, a signature of magnetodielectric effect. Temperature-dependent Raman spectra confirm the spin-phonon coupling which could be the origin of the magnetodielectric effect in the system. Notably, low-field magnetically tunable magnetization reversal is found to appear between and in these compounds owing to the competition between single-ion magnetic anisotropy and antisymmetric Dzyaloshinsky-Moriya interaction. Additionally, the sample reveals the coexistence of magnetically switchable conventional and inverse magnetocaloric effect at 250 and 310 K. The tailoring of these coexisting room-temperature magnetization reversal and magnetocaloric phenomena in a single-phase system suggests a route to design the material suitable for potential applications in electromagnetic and memory devices.
2 More- Received 7 November 2019
- Revised 13 February 2020
- Accepted 27 March 2020
DOI:https://doi.org/10.1103/PhysRevMaterials.4.044407
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