Abstract
We have investigated the relationships between electric field-induced resistance change and the magnetic properties of the Cr 2 O 3 /ultra-thin La 0.7 Sr 0.3 MnO 3 (LSMO) magnetic hetero structure. The LSMO with a thickness of 40 nm has two transition temperatures, the ferromagnetic Curie temperature of 312 K and the spin-glass temperature of 180 K. Resulting from the magnetic properties, the exchange interaction in the Cr 2 O 3 /LSMO behavior below 180 K differed from that below 312 K. With the application an electric field on the Cr 2 O 3 gate, the resistance of LSMO film was changed. This resistance change is most likely due to the magnetic state of LSMO and the interface interaction between the Cr 2 O 3 and LSMO film.
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