Jun 10
Frustrated magnets are fascinating partly because they often refuse to order in the usual way. In kagome spin ice, the magnetic moments are constrained by a local “ice rule”, which produces many nearly equivalent spin configurations and makes conventional magnetic order difficult to establish, as well as to characterize. This becomes especially subtle when the …
Mar 12
A team of researchers led by Colorado State University graduate student Luke Wernert and Associate Professor Hua Chen has discovered a new kind of “Hall effect” that could enable more energy-efficient electronic devices. Their findings, published in Physical Review Letters in collaboration with graduate student Bastián Pradenas and Professor Oleg Tchernyshyov at Johns Hopkins University, reveal a …
Sep 21
First discovered by Edwin Hall in 1881, the anomalous Hall effect describes the transverse flow of electric currents under a longitudinal electric field in a ferromagnetic metal with its magnetization perpendicular to the measurement plane. By flipping the magnetization direction of the ferromagnet the transverse current also changes sign. The behavior looks similar to electrons …
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