Effects of different magnetic flux densities on microstructure and magnetic properties of molecular-beam-vapor-deposited nanocrystalline Fe<sub>64</sub>Ni<sub>36</sub> thin films

doi:10.1007/s11706-015-0289-5

Front. Mater. Sci.

2015, Vol. 9

Issue (2) : 163-169 https://doi.org/10.1007/s11706-015-0289-5

RESEARCH ARTICLE

Effects of different magnetic flux densities on microstructure and magnetic properties of molecular-beam-vapor-deposited nanocrystalline Fe₆₄Ni₃₆ thin films

Yongze CAO,Qiang WANG(

),Guojian LI,Yonghui MA,Jiaojiao DU,Jicheng HE

Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang 110819, China

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Abstract

The nanocrystalline Fe₆₄Ni₃₆ thin films were prepared by molecular-beam-vapor deposition under different magnetic flux densities. The microstructure and magnetic properties of thin films were examined by AFM, TEM, HRTEM and VSM. The results show that with the increase of magnetic flux densities, the changing trend of the average particle size is the same as the coercive force except 6 T. Under 6 T condition, the thin film became the mixture of bcc and fcc phases, which leads to slight increase of the coercive force. In addition, the HRTEM result shows the short-range ordered clusters (embryos) or nucleation rate of thin films increase with increasing magnetic flux densities.

Keywords magnetic field intensity microstructure soft magnetic property coercive force crystallinity

Corresponding Author(s): Qiang WANG

Online First Date: 24 April 2015 Issue Date: 23 July 2015

Cite this article:

Yongze CAO,Qiang WANG,Guojian LI, et al. Effects of different magnetic flux densities on microstructure and magnetic properties of molecular-beam-vapor-deposited nanocrystalline Fe₆₄Ni₃₆ thin films[J]. Front. Mater. Sci., 2015, 9(2): 163-169.

URL:

https://academic.hep.com.cn/foms/EN/10.1007/s11706-015-0289-5
https://academic.hep.com.cn/foms/EN/Y2015/V9/I2/163

Fig.1 Hysteresis loops in the in-plane of Fe₆₄Ni₃₆ thin films under different magnetic flux densities of (a) 0 T, (b) 0.5 T, (c) 1 T, (d) 2 T, (e) 3 T, (f) 4 T, (g) 5 T, and (h) 6 T when the angles between the field direction and the easy axis are 0°, 45° and 90°, respectively. Insets show the corresponding hysteresis loops out of plane.

Fig.2 (a) Curves of the average particle size and the coercive force in the in plane as a function of magnetic flux densities (Insets show the surface morphology under 0 T and 6 T, respectively). (b) The curve of surface roughness as a function of magnetic flux densities.

Fig.3 TEM results under different magnetic flux densities: (a) 0 T; (b) 3 T; (c) 6 T.

Fig.4 HRTEM results under different magnetic flux densities: (a) 0 T; (b) 3 T; (c) 6 T.

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