SPIN-DEPENDENT INTERFACIAL TUNNELING AND MAGNETO RESISTANCE IN THE FAMILY OF GRANULAR PEROVSKITE La1-xSrxMnO*3 |
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| Affiliation: | State Key Laboratory of Jiangsu Province for Optic and Electric Techniques, Nanjing Normal University, Nanjing 210097, China; State Key Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China |
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| Abstract: | ![]()
The magnetic transport properties in granular perovskite system La1-xSrxMnO*3 have been investigated. The spin-dependent inter facial tunneling and the corresponding giant magnetoresistance (GMR) effect have been observed in the whole temperature range below the Curie point Tc for the samp les with concentration x from 0.05 to 0.45. Theoretical analysis shows that the interfacial tunneling originates from the difference in magnetism between surfaces and cores, and the tunnel-type GMR stems from the field-induced change of interfacial magnetic order. |
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