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

Chem. J. Chinese Universities

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

WANG Li-Li^1,2, JIANG Wei-Di³, ZHAO Li-Jun¹, GONG Jie¹, ZHENG Wei-Tao^2*

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

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 H_c increased to 18.72 kA/m at substrate temperature of 350 ℃ firstly, the H_c decreased with the substrate temperature increasing to 450 ℃. It can be deduced that exchange length (L_ex) of nanocrystal ε-Fe₃N thin films was about grain size 30 nm.

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

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WANG Li-Li^1,2, JIANG Wei-Di³, ZHAO Li-Jun¹, GONG Jie¹, ZHENG Wei-Tao^2*. Effect of Substrate Temperature on Growth and Magnetic Properties of Nanocrystal Fe₃N Thin Films[J]. Chem. J. Chinese Universities, doi: .

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

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