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Title: Magnetic and transport properties of Ge : MMMn granular system
Authors: Li, H.
Wu, Y. 
Liu, T. 
Wang, S.
Guo, Z.
Osipowicz, T. 
Keywords: Diluted magnetic semiconductors (DMSs)
Granular systems
Schottky barrier
Issue Date: 18-May-2006
Citation: Li, H., Wu, Y., Liu, T., Wang, S., Guo, Z., Osipowicz, T. (2006-05-18). Magnetic and transport properties of Ge : MMMn granular system. Thin Solid Films 505 (1-2) : 54-56. ScholarBank@NUS Repository.
Abstract: Ge : Mn granular thin films were fabricated on semi-insulating GaAs(001) substrates by molecular beam epitaxy. Transmission electron microscopy and Raman study showed that the sample has a granular structure consisting of GeMn crystallites in a Ge polycrystalline host matrix. A Curie temperature of ∼ 300 K was observed in the magnetization measurement, suggesting that the granules are Mn5Ge3. The granular nature of the material was also revealed clearly in the differential conductance vs. bias voltage curves. The unique conductance versus bias voltage curve suggests that the electrical transport is determined by Schottky barriers at the nanoparticle/host matrix interface. This type of material might be useful for studying spin-injections from metallic magnetic nanostructures to semiconductors. © 2005 Elsevier B.V. All rights reserved.
Source Title: Thin Solid Films
ISSN: 00406090
DOI: 10.1016/j.tsf.2005.10.038
Appears in Collections:Staff Publications

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