Colossal Anomalous Hall effect in a noncoplanar antiferromagnet
ORAL
Abstract
The intriguing interplay between complex magnetism and charge transport in noncoplanar magnetic materials have attracted considerable research. In this talk, we will show our discovery of a colossal anomalous Hall effect (AHE) observed in a noncoplanar antiferromagnet, which undergoes magnetic phase I, magnetic phase II and polarized ferromagnetic state under field. By analyzing the temperature and sample-dependence of the AHE, we attribute the extraordinary AHE to the strong skew scattering mechanism in magnetic phase II, in contrast to the weak skew scattering observed in both phase I and the polarized ferromagnetic state. We then discuss the possible mechanisms leading to such an extremely large AHE.
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Presenters
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Ni Ni
University of California, Los Angeles
Authors
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Ni Ni
University of California, Los Angeles
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Jay Green
UCLA, University of California, Los Angeles
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Madalynn Marshall
Kennesaw State University, Oak Ridge National Lab
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Shuai Sun
UCLA
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Eve Emmanouilidou
University of California, Los Angeles
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Huibo Cao
Oak Ridge National Laboratory