Role of oxygen impurity in growth and magnetic properties of Ni83Fe17 permalloy thin films

Chowdhury, P and Barshilia, Harish C and Rajam, KS and Mishra, P.K. and Prajapat, C.L. and Sridhara Rao, DV (2010) Role of oxygen impurity in growth and magnetic properties of Ni83Fe17 permalloy thin films. Journal of Magnetism and Magnetic Materials, 322 (21). pp. 3266-3270. ISSN 0304-8853

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    Abstract

    To study the influence of oxygen impurities in the sputtering atmosphere on micro structure,and the magnetic and magnetotransport properties,thin films of Ni83Fe17 were deposited under dc magnetron puttering technique into which regulated oxygen gas was introduced. The partial pressure of oxygen was varied from 2�10 7 to 3�10�6mbar.X- ray diffraction patterns indicate the reduction of grain growth ith increasing the oxygen partial pressure. The grain micro structure and the composition were confirmed through high resolution transmission electron microscopy attached with Scanning Transmission Electron Microscopy (STEM). Transition from canted to rectangular magnetic hysteresis loop was observed through magnetization measurements for samples prepared under higher oxygen partial pressure which implies the structural changes in the magnetic domain formation. These observations were further confirmed through the measurements of an isotropic magneto resistance properties.

    Item Type: Journal Article
    Subjects: PHYSICS > Physics(General)
    Division/Department: Surface Engineering Division, Surface Engineering Division, Surface Engineering Division, Other, Other, Other
    Depositing User: Mr N Selvakumar
    Date Deposited: 01 Aug 2011 12:29
    Last Modified: 01 Aug 2011 12:29
    URI: http://nal-ir.nal.res.in/id/eprint/9753

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