Physics Seminar: Ratchet Effect Induced by Frustrated Spin Ice Nanomagnets
J. L. Vicent, Universidad Complutense
Abstract: We have designed, fabricated and tested a robust superconducting ratchet device based on topologically frustrated spin ice nanomagnets. Frustrated magnets are materials in which magnetic moments interact through competing exchange interactions that cannot be simultaneously satisfied. One of the most interesting and stimulating systems are artificially spin ice arrays fabricated with nanomagnets which are geometrically frustrated following the so-called in-out ice rules. Our spin ice system consists of magnetic half vortices with two charged magnetic Néel walls. This spin ice induces superconducting ratchet effect (Villegas et al. Science 302). This ratchet effect is independent of the distribution of magnetic charges in the array.
Wednesday, May 29, 2019 at 11:00am
Regents Hall, 351
3700 O St. NW