Scientific reports 2015-01-01

Investigation on Spin Dependent Transport Properties of Core-Shell Structural Fe₃O₄/ZnS Nanocomposites for Spintronic Application.

Er Liu, Honglei Yuan, Zhaoxia Kou, Xiumei Wu, Qingyu Xu, Ya Zhai, Yunxia Sui, Biao You, Jun Du, Hongru Zhai

Index: Sci. Rep. 5 , 11164, (2015)

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Abstract

The core-shell structural Fe3O4/ZnS nanocomposites with controllable shell thickness were well-fabricated via seed-mediate growth method. Structural and morphological characterizations reveal the direct deposition of crystalline II-VI compound semiconductor ZnS shell layer on Fe3O4 particles. Spin dependent electrical transport is studied on Fe3O4/ZnS nanocomposites with different shell thickness, and a large magnetoresistance (MR) ratio is observed under the magnetic field of 1.0 T at room temperature and 100 K for the compacted sample by Fe3O4/ZnS nanocomposites, which is 50% larger than that of sample with pure Fe3O4 particles, indicating that the enhanced MR is contributed from the spin injection between Fe3O4 and ZnS layer.