Size-dependent structure and magnetic properties of co-evaporated Fe-SiO2 nanoparticle composite film under high magnetic field | Zendy

Yonghui Ma | Zendy; Guojian Li | Zendy; Jiaojiao Du | Zendy; Mengmeng Li | Zendy; Jianhao Wang | Zendy; Qiang Wang | Zendy

Open Access

Size-dependent structure and magnetic properties of co-evaporated Fe-SiO2 nanoparticle composite film under high magnetic field

Author(s) -

Yonghui Ma,

Guojian Li,

Jiaojiao Du,

Mengmeng Li,

Jianhao Wang,

Qiang Wang

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4944516

Subject(s) - coercivity , materials science , particle size , evaporation , composite number , nanoparticle , volume fraction , particle (ecology) , magnetization , saturation (graph theory) , thin film , composite material , analytical chemistry (journal) , chemical engineering , magnetic field , condensed matter physics , nanotechnology , chemistry , chromatography , oceanography , physics , mathematics , quantum mechanics , combinatorics , geology , engineering , thermodynamics

Composite film of Fe nanoparticles embedded in a SiO2 matrix has been prepared by the co-evaporation of Fe and SiO2. Both source temperature and in-situ high magnetic field (HMF) have been used to adjust the Fe particle size and the growth of Fe-SiO2 film. The size of Fe particle decreased with increasing the source temperature without HMF. When HMF was presented during the growth of the film, the size of Fe particle was enlarged and reduced for source temperatures of 1300 °C and 1400 °C, respectively. Meanwhile, the preferred orientation of the film grown at 1400 °C became uniform with the application of HMF. In addition, it is also found that the film was formed in two layers. One layer is formed by the Fe particle, while the other is free of Fe particles due to the existence of more SiO2. The structural variation has a significant effect on the magnetic properties. The coercivity (90 Oe) of the 1300 °C film is much higher than that (6 Oe) of the 1400 °C film with a small particle size and uniform orientation. The saturation magnetization can be increased by increasing the Fe particle volume fraction. This study develops a new method to tune the soft magnetic properties by the co-evaporation of Fe and SiO2

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