TAILIEUCHUNG - Angular dependence of magnetic properties in Co nanowire arrays
The Co nanowire arrays were fabricated by electrodeposition method by using the porous polycarbonate template. Study on crystallographic structure, micro structure, and the element composition confirmed the quality of the fabricated Co nanowires. SEM image shows the wires with an average diameter of 200 nm and the average length of 9 m. | Vietnam Journal of Science and Technology 56 (1A) (2018) 65-71 ANGULAR DEPENDENCE OF MAGNETIC PROPERTIES IN Co NANOWIRE ARRAYS Luu Van Thiem1, Le Tuan Tu2, Pham Duc Thang3, Nguyen Minh Hoang4 1 Faculty of Basic Science, Hanoi Industrial Textile Garment University, Le Chi, Gia Lam, Ha Noi 2 Faculty of Physics, VNU University of Science, 334 Nguyen Trai, Thanh Xuan, Ha Noi 3 Faculty of Engineering Physics and Nanotechnology, VNU University of Engineering Technology, 144 Xuan Thuy, Cau Giay, Ha Noi 4 Department of Physics & Biophysics, Vietnam Military Medical University, 160 Phung Hung, Ha Dong, Ha Noi * Email: thiemlv@ Received: 15 August 2017; Accepted for publication: 22 February 2018 ABSTRACT The Co nanowire arrays were fabricated by electrodeposition method by using the porous polycarbonate template. Study on crystallographic structure, micro structure, and the element composition confirmed the quality of the fabricated Co nanowires. SEM image shows the wires with an average diameter of 200 nm and the average length of 9 m. The magnetic properties, measured at room temperature using vibrating sample magnetometry (VSM), displays that the nanowires have anisotropic property. The angular dependence of coercivity of Co nanowires has been studied. The decrease of the coercivity, when the angular changed from 0 o to 90 o, will be discussed. Keywords: PC template, Co nanowires, magnetic properties and angular. 1. INTRODUCTION In the last few years, the fabrication and characterization of magnetic one dimensional nanostructures have been drawn much attention because of their potential applications in the high density magnetic recording media, magnetic sensors, cell separation and magnetic labeling in biomedicine [1, 2, 3]. The magnetic nanowires have quasi-one dimensional (1D) anisotropic structures along the wire axis and the magnetic properties of the nanowires are related to many parameters such as diameter, length, and composition [3, 4, 5]. .
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