SPIN-DEPENDENT INTERFACIAL TUNNELING AND MAGNETO RESISTANCE IN THE FAMILY OF GRANULAR PEROVSKITE La1-xSrxMnO*3
ZHANG NING (张宁)ab, DING WEI-PING (丁维平)b, TAN XI-LIN (谭锡林)a, XU YIN-LIN (徐寅林)a, XING DING-YU (邢定钰)b, DU YOU-WEI (都有为)b
a State Key Laboratory of Jiangsu Province for Optic and Electric Techniques, Nanjing Normal University, Nanjing 210097, China; b State Key Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
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.
Received: 08 September 1997
Accepted manuscript online:
(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
Fund: Project supported by the 85-06 NMS, China.
Cite this article:
ZHANG NING (张宁), DING WEI-PING (丁维平), TAN XI-LIN (谭锡林), XU YIN-LIN (徐寅林), XING DING-YU (邢定钰), DU YOU-WEI (都有为) SPIN-DEPENDENT INTERFACIAL TUNNELING AND MAGNETO RESISTANCE IN THE FAMILY OF GRANULAR PEROVSKITE La1-xSrxMnO*3 1998 Acta Physica Sinica (Overseas Edition) 7 361
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