中国物理B ›› 1998, Vol. 7 ›› Issue (5): 361-367.doi: 10.1088/1004-423X/7/5/007

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SPIN-DEPENDENT INTERFACIAL TUNNELING AND MAGNETO RESISTANCE IN THE FAMILY OF GRANULAR PEROVSKITE La1-xSrxMnO*3

谭锡林1, 徐寅林1, 张宁2, 丁维平3, 邢定钰3, 都有为3   

  1. (1)State Key Laboratory of Jiangsu Province for Optic and Electric Techniques, Nanjing Normal University, Nanjing 210097, China; (2)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; (3)State Key Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
  • 收稿日期:1997-09-08 出版日期:1998-05-20 发布日期:1998-05-20
  • 基金资助:
    Project supported by the 85-06 NMS, China.

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   

  1. 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
  • Received:1997-09-08 Online:1998-05-20 Published:1998-05-20
  • Supported by:
    Project supported by the 85-06 NMS, China.

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摘要： 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.

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.

中图分类号:  (Magnetic oxides)

  • 75.47.Lx
72.25.Mk (Spin transport through interfaces) 73.40.Gk (Tunneling) 75.70.Cn (Magnetic properties of interfaces (multilayers, superlattices, heterostructures))