Method for Simultaneously Measuring In- and Out-of-Plane Surface Magnetic Properties of Thin Films
Oblique incidence and zero-area loopSimultaneous measurement of in-plane and out-of-plane magnetization
Probing surface magnetic propertiesCharacterization of thin filmsCharacterization of magnetized samples
In magnetized samples, a reflected light beam (due to interaction with a sample) differs in phase from the original beam. This non-reciprocal optical effect provides information about the sample’s surface magnetic properties. Surface properties are currently measured using two configurations: one where light travels zero-area but is normally incident to the sample and the other where light travels a finite-area loop but at an oblique incidence angle. Both methods are required to measure in- and out-of-plane magnetic properties but must be measured separately as combining both into a single measurement gives rise to delayed echoes and degradation of the overall signal. Researchers at the University of California Davis have developed a method which enables simultaneously oblique incidence and zero-loop area measurement configurations for sensitive detection of in- and out-of-plane magnetization. This method employs an optical configuration in which a single beam is split into two polarized beams that hit the magnetized sample at an oblique angle. The reflected beams then return to the beam source for recollection and phase analysis. Utilizing this oblique incidence allows for measurement of both in-plane and out-of-plane effects. Furthermore, reflection after light-sample interaction sends both polarized components back in such a manner that zero-area is enclosed in the loop traversed by the beam. This system allows for simultaneous oblique incidence and zero-loop area measurements while preventing delayed echoes and degradation of the signal.
Tech ID/UC Case 29522/2017-367-0 Related Cases 2017-367-0
USA
