Chem. J. Chinese Universities

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Effect of Substrate Temperature on Growth and Magnetic Properties of Nanocrystal Fe3N Thin Films

WANG Li-Li1,2, JIANG Wei-Di3, ZHAO Li-Jun1, GONG Jie1, ZHENG Wei-Tao2*   

    1. College of Science, Changchun University, Changchun 130022, China;
    2. Department of Materials Science and Engineering, Jilin University, Changchun 130012, China;
    3. Department of Physics, China Jiliang University, Hangzhou 310018, China
  • Received:2008-03-21 Revised:1900-01-01 Online:2009-01-10 Published:2009-01-10
  • Contact: ZHENG Wei-Tao

Abstract: The nanocrystal ε-Fe3N thin films were deposited on Si(100) substrate at different substrate temperatures of 150, 250, 350, 450 ℃ by DC magnetron sputtering. The structure, morphology and magnetic properties of the films deposited at different substrate temperature were characterized via X-ray diffraction(XRD), scanning electron microscopy(SEM) and vibrating sample magnetometer(VSM).The results show that ε-Fe3N has ferromagnetic properties, and its grain sizes, growth velocity and unsaturated magnetization measured at 400 kA/m field increase with increasing substrate temperature. The coercive force Hc increased to 18.72 kA/m at substrate temperature of 350 ℃ firstly, the Hc decreased with the substrate temperature increasing to 450 ℃. It can be deduced that exchange length (Lex) of nanocrystal ε-Fe3N thin films was about grain size 30 nm.

Key words: ε-Fe3N thin film, Grain size, Magnetic property, Exchange length

CLC Number: 

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