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Transport properties in iron–iron oxide film near percolation threshold

Authors
Journal
Journal of Alloys and Compounds
0925-8388
Publisher
Elsevier
Publication Date
Volume
465
Identifiers
DOI: 10.1016/j.jallcom.2007.10.142
Keywords
  • Magnetic Films And Multilayers
  • Electronic Transport
  • Magnetic Measurements

Abstract

Abstract Iron–iron oxide granular films are fabricated using dc magnetron sputtering. Their structural, magnetic and transport properties are studied in the vicinity of percolation threshold. X-ray photoelectron spectroscopy and transmission electron microscopy confirm the coexistence of iron and FeO x . Magnetic measurement indicates the exchange coupling between the iron and the FeO x matrix. Metal–insulator transition is observed. The non-monotonic temperature dependencies of resistivity occur near the percolation threshold and the mechanism is investigated with the longitudinal and transverse magnetic transport measurement in terms of weak localization.

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