The influence of crystallinity enhancement on the magnetic properties of ac electrodeposited Fe nanowires |
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Authors: | A Ramazani M Almasi Kashi V Bayzi Isfahani and M Ghaffari |
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Institution: | (1) Department of Material Science and Engineering, National Cheng Kung University, Tainan, 70101, Taiwan, ROC;(2) Department of Material Science and Engineering, I-Shou University, Kaohsiung County, Taiwan, ROC |
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Abstract: | Fe nanowire arrays with different degrees of crystallinity were fabricated by ac electrodeposition into anodic aluminium oxide
templates. A (110) preferential crystal orientation was observed for all the samples. An extensive investigation of X-ray
patterns revealed that the variation of the magnetic properties is a direct consequence of the crystallinity degree of Fe
nanowires. The results indicate that the degree of crystallinity varies with electrolyte acidity, waveform and frequency of
the ac electrodeposition voltage. Regardless of the waveform and electrolyte acidity, higher deposition frequency induces
higher coercivity. The effect of waveform and pH value on the magnetic properties is seen to be more pronounced in the low
deposition frequency. Improving the ac electrodeposition conditions increased the coercivity and squareness from almost 1010
Oe and 0.49 to 1810 Oe and 0.99, respectively. It was seen that annealing improved the crystallinity, thereby increasing the
coercivity and squareness. |
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Keywords: | |
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