FePt Thin Films Electrodeposited from Non-Aqueous Liquids

作者：Zhou Hong-ru; Yu Yun-dan; Wei Guo-ying^*; Ge Hong-liang

来源：International Journal of Electrochemical Science, 2012, 7(6): 5544-5556.

• ionic liquids
• cyclic voltammetry
• electrodeposition
• FePt
• ferromagnetic

FePt thin films have been electrodeposited from the mixture of ammonium hexachloroplatinate and iron dichloride in ionic liquids based on glycol and 1-Ethyl-3-methylimidazolium chloride. Electrochemical behaviour of iron dichloride in the liquids has been studied by cyclic voltammetry. The results show that the reduction of Fe (II) to Fe is irreversible diffused controlled and the diffusion coefficient is 1.58 x 10(-7) cm(2)/s. The iron atomic content in the FePt films is ranging from 46.0 at % to 62.6 at % when deposition potentials have been changed from -1.4 V to -1.8 V vs Ag/AgCl in electrodeposition system with the ammonium hexachloroplatinate(50 mM/L), iron dichloride(550 mM/L), glycol and 1-Ethyl-3-methylimidazolium chloride at 373 K. The surface morphology of the deposited films was changed as the increase of deposition potential. A net-like structure appeared in FePt thin films with 52.5 at % iron. From the X-ray diffraction (XRD) pattern, it seems that the fct structural FePt has been obtained when the iron content is about 52.5 at %. Magnetic hysteresis loops show that the films exhibit ferromagnetic behaviors when the iron content in FePt films is 52.5 at % with the maximum coercivity 546 Oe.

• 出版日期2012-6
• 单位中国计量大学