Anisotropic ferromagnetism in Fe (x) Sn1-x O-2 nanostructure arrays

作者：Chen, Shutian^*; Li, Zhengcao; Zhang, Zhengjun

来源：Journal of Materials Science, 2018, 53(5): 3280-3288.

DOI：10.1007/s10853-017-1804-0

• ZNO THIN-FILMS
• MAGNETIC-PROPERTIES
• CO
• SEMICONDUCTOR

Periodic arrays of Fe (x) Sn1-x O-2 nanostructures were fabricated by glancing angle sputter deposition onto self-assembled close-packed arrays of 200-nm-diameter polystyrene microspheres. After annealing at 873 K for 3 h, all the films were crystallized to rutile SnO2 and maintained good thermal stability in the morphology. Compared with Fe (x) Sn1-x O-2 flat films, arrays of Fe (x) Sn1-x O-2 nanostructures possessed larger saturation magnetic moment and exhibited both perpendicular and in-plane magnetic anisotropy, resulting from the anisotropic morphology of Fe (x) Sn1-x O-2 nanostructures. The EPR signal originating from the oxygen vacancies significantly varied with the Fe concentration and reached the strongest at x = 0.059, which is consistent with the saturation magnetization. It demonstrates that the oxygen vacancies are an important factor for the ferromagnetism of Fe (x) Sn1-x O-2 films.

• 出版日期2018-3
• 单位南京工程学院; 清华大学