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arXiv · 2207.01846

Observation of enhanced spin-spin correlations at triple point in 2D ferromagnetic Cr2X2Te6 (X=Si, Ge)

Yugang Zhang·Zefang Li·Jing Zhang·Long Zhang·Yonghong Li·Shuang Liu·Young Sun·Wenhong Wang·Yisheng Chai
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Abstract

The domain dynamics and spin-spin correlation of 2D ferromagnets Cr2X2Te6 (X=Si, Ge) are investigated by a composite magnetoelectric method. The magnetic field-temperature phase diagrams for both in-plane and out-of-plane magnetic fields disclose a triple point around TC and 1 kOe, where ferromagnetic, paramagnetic, and spin-polarized phases coexist. The magnetoelectric signal shows peak features at the phase boundaries and reaches the maximum at the triple point, suggesting significant enhancement of spin-spin correlations at this point. A comparison between two systems reveals that the spin-spin correlations in Cr2Si2Te6 are stronger than that in Cr2Ge2Te6.

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Yugang Zhang, Zefang Li, Jing Zhang, Long Zhang, Yonghong Li, Shuang Liu, Young Sun, Wenhong Wang, Yisheng Chai. 2022-07-05. Observation of enhanced spin-spin correlations at triple point in 2D ferromagnetic Cr2X2Te6 (X=Si, Ge). https://doi.org/10.1103/physrevb.107.134417

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