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Fabrication and magnetic properties of ordered Co100−xPbx nanowire arrays electrodeposited in AAO templates: Effects of annealing temperature and frequency

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Abstract

CoxPb1−x nanowire arrays within an anodic aluminum oxide (AAO) template were electrodeposited from an appropriate acetate bath by applying alternating current (ac). The effect of the Pb content on magnetic properties of nanowire arrays was investigated. By adding Pb2+ to an electrolyte containing Co2+, the coercivity field of nanowires decreased from 1508 Oe in Co100 to 921 Oe in Co92.5Pb7.5 while squareness increased from 0.74 for Co nanowires to about 0.82 for Co92.5Pb7.5 nanowire alloy sample. The effect of annealing on the magnetic properties of nanowires in the temperature range between 300 °C and 600 °C was also investigated. It was observed that the coercivity field of Co97.5Pb2.5 nanowire increases from 1290 Oe at room temperature to 1785 Oe at 600 °C. Furthermore, the effect of electrodeposition frequency on the magnetic properties of Co97.5Pb2.5 nanowires was studied. The coercivity was enhanced with increasing frequency; however, after annealing all samples exhibited enhanced coercivity regardless of the electrodeposition frequency.

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ACKNOWLEDGMENTS

The authors are grateful of the Grant Research Councils of HUT and Kurdistan Universities for the financial support.

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Authors and Affiliations

  1. Department of Materials Engineering, Hamedan University of Technology (HUT), Hamedan, 65169-13733, Iran

    Mojgan Najafi

  2. Department of Physics, University of Kurdistan, Sanandaj, 66177-15175, Iran

    Pezhman Amjadi & Zahra Alemipour

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  1. Mojgan Najafi
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Correspondence to Mojgan Najafi.

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Najafi, M., Amjadi, P. & Alemipour, Z. Fabrication and magnetic properties of ordered Co100−xPbx nanowire arrays electrodeposited in AAO templates: Effects of annealing temperature and frequency. Journal of Materials Research 32, 1177–1183 (2017). https://doi.org/10.1557/jmr.2017.67

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  • DOI: https://doi.org/10.1557/jmr.2017.67

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