Sign-reversal Anomalous Hall effect driven by a magnetic transition in Cr_7-δTe_8
arxiv(2024)
摘要
The search for exotic spin configurations and related novel transport
properties continues to be fueled by the promise of new electronic states and
outstanding candidate components for spintronic applications. In layered
Cr_7-δTe_8, the applied field drives a before unreported magnetic
transition revealed by the alternating current magnetic susceptibility
measurements around room temperature. This observed magnetic transition results
in a sign change for the anomalous Hall effect which exhibits non-monotonous
temperature dependence. The prominent topological Hall effect (THE) with a
large value of 1μΩ· cm has been observed without breaking the
inversion symmetry for Cr_7-δTe_8. This robust THE can persist up to
room temperature attributed to the nonzero fluctuation-driven scalar spin
chirality. The complicated interactions of long-range and short-range magnetic
orders lead to rich exotic magnetic states with related novel transport
properties in Cr_7-δTe_8.
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