Colossal magnetic phase transition asymmetry in mesoscale FeRh stripes.

ABSTRACT: Coupled order parameters in phase-transition materials can be controlled using various driving forces such as temperature, magnetic and electric field, strain, spin-polarized currents and optical pulses. Tuning the material properties to achieve efficient transitions would enable fast and low-power electronic devices. Here we show that the first-order metamagnetic phase transition in FeRh films becomes strongly asymmetric in mesoscale structures. In patterned FeRh stripes we observed pronounced supercooling and an avalanche-like abrupt transition from the ferromagnetic to the antiferromagnetic phase, while the reverse transition remains nearly continuous over a broad temperature range. Although modest asymmetry signatures have been found in FeRh films, the effect is dramatically enhanced a

SUBMITTER: Uhlir V 

PROVIDER: S-EPMC5062592 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature