The film grown on the Si substrate exhibited a polycrystalline structure. The surface morphology of the ZFO thin film substantially depended on its crystallographic features. The SEM and AFM images demonstrated that the surface of the ZFO (222) epitaxial film was flat and smooth; however, the surface of the randomly oriented film was rough and exhibited
3D grains. The visible emission bands of the ZFO thin films were attributed to growth-induced oxygen vacancies. The ZFO thin films demonstrated a spin-glass transition temperature of approximately 40 K. The ZFO (222) epitaxial film exhibited the most marked selleck inhibitor magnetic anisotropy among the samples. Acknowledgements This work is supported by the National Science Council of Taiwan (grant no.NSC 102-2221-E-019-006-MY3) and National Taiwan Ocean University (grant no. NTOU-RD-AA-2012-104012). The authors thank assistance in SEM examination given by the sophisticated instrument user center of National Taiwan Ocean University. References 1. Liu GG, Proteases inhibitor Zhang XZ, Xu YJ, Niu XS, Zheng LQ, Ding XJ: Effect of ZnFe 2 O 4 doping on the photocatalytic activity of TiO 2 . Chemosphere 2004, 55:1287–1291.CrossRef 2. Gudiksen MS, Lauhon LJ, Wang JF, Smith DC,
Lieber CM: Growth of nanowire superlattice structures for nanoscale photonics and electronics. Nature 2002, 415:617–620.CrossRef 3. Oliver SA, Hamdeh HH: Localized spin canting in partially inverted ZnFe 2 O 4 fine powders. Phys Rev B 1999, 60:3400–3405.CrossRef 4. Sun L, Shao R, Tang L, Chen Z: Synthesis of ZnFe 2 O 4 /ZnO nanocomposites immobilized on graphene with enhanced
photocatalytic activity under solar light irradiation. J Alloys VX-770 price Compounds 2013, 564:55–62.CrossRef 5. Liu H, Guo Y, Zhang Y, Wu F, Liu Y, Zhang D: Synthesis and properties of ZnFe 2 O 4 replica with Y-27632 2HCl biological hierarchical structure. Mater Sci Eng B 2013, 178:1057–1061.CrossRef 6. Chen CH, Liang YH, Zhang WD: ZnFe 2 O 4 /MWCNTs composite with enhanced photocatalytic activity under visible-light irradiation. J Alloys Compounds 2010, 501:168–172.CrossRef 7. Chen ZP, Fang WQ, Zhang B, Yang HG: High-yield synthesis and magnetic properties of ZnFe 2 O 4 single crystal nanocubes in aqueous solution. J Alloys Compounds 2013, 550:348–352.CrossRef 8. Tanaka K, Nakashima S, Fujita K, Hirao K: High magnetization and the Faraday effect for ferrimagnetic zinc ferrite thin film. J Phys Condens Matter 2003, 15:L469-L474.CrossRef 9. Yamamoto Y, Tanaka H, Kawai T: The control of cluster-glass transition temperature in Spinel-type ZnFe 2 O 4-δ thin film. Jpn J Appl Phys 2001, 40:L545-L547.CrossRef 10. Nakashima S, Fujita K, Tanaka K, Hirao K: High magnetization and the high-temperature superparamagnetic transition with intercluster interaction in disordered zinc ferrite thin film. J Phys Condens Matter 2005, 17:137.CrossRef 11.