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Intricate magnetic interactions and topological Hall effect observed in itinerant room-temperature layered ferromagnet Cr0.83Te

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arXiv:2404.07237v2 Announce Type: replace
Abstract: We report the magnetic, electrical, and magnetotransport (Hall effect) properties of the hexagonal itinerant ferromagnet Cr$_{0.83}$Te. Further, a comprehensive study of the magneto-entropy scaling behavior has been done around the Curie temperature of $T_C \approx$ 338 K. A maximum entropy change (-$\Delta S_{m}^{max}$) of 2.77 $J/kg-K$ and relative cooling power (RCP) of 88.29 $J/kg$ near the T$_C$ have been achieved under an applied magnetic field of 5 Tesla. The critical exponents, $\beta$ = 0.4739(4), $\gamma$ = 1.2812(3), and $\delta$ = 3.7037(5), have been extracted using the magneto-entropy scaling analysis. The obtained critical exponents indicate the presence of intricate magnetic interactions in Cr$_{0.83}$Te. On the other hand, the magnetotransport study reveals a topological Hall effect attributed to the noncoplanar spin structure coexisting with a robust magnetocrystalline anisotropy. Further, we observe that the extrinsic skew-scattering mechanism originated anomalous Hall effect. Our experimental findings of the anomalous and topological Hall effect properties in the presence of intriguing high-temperature itinerant ferromagnetism and magnetocaloric effect in Cr$_{0.83}$Te can offer potential technological applications at room temperature.

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