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Observation of unconventional anomalous Hall effect in epitaxial CrTe thin films
Wanjun Jiang1,3(
), Qikun Xue1,3()
), Qikun Xue1,3()Abstract
We have studied the magnetic and electrical transport properties of epitaxial NiAs-type CrTe thin films grown on SrTiO3(111) substrates. Unlike rectangle hysteresis loops obtained from magnetic measurements, we have identified intriguing extra bump/dip features from anomalous Hall experiments on the films with thicknesses less than 12 nm. This observed Hall anomaly is phenomenologically consistent with the occurrence of a topological Hall effect(THE) in chiral magnets with a skyrmion phase. Furthermore, the THE contribution can be tuned by the film thickness, showing the key contribution of asymmetric interfaces in stabilizing Néel-type skyrmions. Our work demonstrates that a CrTe thin film on SrTiO3(111) substrates is a good material candidate for studying real-space topological transport.
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Pages 3116-3121
Cite this article:
Zhao D, Zhang L, Malik IA, et al. Observation of unconventional anomalous Hall effect in epitaxial CrTe thin films. Nano Research, 2018, 11(6): 3116-3121. https://doi.org/10.1007/s12274-017-1913-8
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