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Magnetotransport properties of La0.67Ca0.33MnO3/La0.67Sr0.33MnO3 bilayers
Magnetotransport properties of La0.67Ca0.33MnO3//La0.67Sr0.33MnO3 bilayers

Keywords: manganites,magnetic coupling,bilayer film
水锰矿
,钙钛矿,磁性耦合,双分子层膜

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Abstract:

The perovskite bilayers La0.67Ca0.33MnO3 (LCMO) (100nm) / La0.67Sr0.33MnO3(LSMO) (100 nm) and LSMO (100 nm) / LCMO (100 nm) are fabricated by a facing-target sputtering technique. Their transport and magnetic properties are investigated. It is found that the transport properties between them are different obviously due to distinguishable structures, and the different lattice strains in both films result in the difference of metal-to-insulator transition. Only single-step magnetization loop appears in our bilayers from 5K to 320K, and the coercive force of LSMO/LCMO varies irregularly with a minimum \sim 2387A/m which is lower than that of LCMO and LSMO single layer films. The behaviour is explained by some magnetic coupling.

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