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Microstructure and magnetotransport properties of Cu doped Fe3O4 films D. Tripathy and A. O. Adeyeyea
 

Summary: Microstructure and magnetotransport properties of Cu doped Fe3O4 films
D. Tripathy and A. O. Adeyeyea
Information Storage Materials Laboratory, Department of Electrical and Computer Engineering,
National University of Singapore, Singapore 117576, Singapore
C. B. Boothroyd and S. Shannigrahi
Institute of Materials Research and Engineering, 3, Research Link, Singapore 117602, Singapore
Presented on 8 November 2007; received 16 August 2007; accepted 4 September 2007;
published online 16 January 2008
A systematic and study on the microstructure and magnetotransport properties of Cu doped Fe3O4
films prepared by cosputtering is presented. Structural investigations reveal that the Cu doped films
are polycrystalline in nature with a preferred growth direction and retain the cubic spinel structure
of Fe3O4. Another characteristic feature of the Cu doped films is the transport mechanism being
dominated by spin dependent tunneling across grain boundaries. The magnetic properties of the
doped films are markedly sensitive to the doping concentration, with both saturation magnetization
and coercivity increasing with increasing Cu doping concentration. In-plane magnetoresistance
MR measurements show a reduction in MR ratio as the Cu doping concentration is increased.
2008 American Institute of Physics. DOI: 10.1063/1.2828504
Magnetite Fe3O4 is one of the most extensively studied
ferrimagnetic oxides due to its unique and interesting set of
magnetic and spin dependent transport properties.14

  

Source: Adeyeye, Adekunle - Department of Electrical and Computer Engineering, National University of Singapore

 

Collections: Physics; Materials Science