1. Nanomaterials Engineering and Research Center, Central Iron and Steel Research Institute, Beijing 100081, China; 2. Research and Development Center, Advanced Technology and Materials Co Ltd, Beijing 100081, China
Influence of Frequency and Bias Current on Asymmetrical GMI Effect in Co71��8Fe4��9Nb0��8Si7��5B15 Amorphous Glass��Covered Wires
1. Nanomaterials Engineering and Research Center, Central Iron and Steel Research Institute, Beijing 100081, China; 2. Research and Development Center, Advanced Technology and Materials Co Ltd, Beijing 100081, China
ժҪ The Co71��8Fe4��9Nb0��8Si7��5B15 amorphous glass��covered wires (AGCW) are prepared by the Taylor��Ulitovsky technique. The frequency dependence of asymmetrical giant magneto��impedance (AGMI) effect in amorphous glass��covered wires annealed by 70 mA DC current is here presented. The resistance R and the reactance X have been measured, respectively. The real part R and the imaginary part X of impedance play an important role at high frequency and low frequency, respectively. The influence of DC bias current from Ib=0 mA to Ib=5 mA at 30 MHz on the GMI effect in the glass��covered wires annealed by 70 mA DC current is investigated. The asymmetry becomes the largest around Ib=1 mA, and finally decreases for the larger bias current Ib=5 mA. The maximum ��Z/Z ratio of 310% is observed at 58 MHz under 1 mA bias current.
Abstract��The Co71��8Fe4��9Nb0��8Si7��5B15 amorphous glass��covered wires (AGCW) are prepared by the Taylor��Ulitovsky technique. The frequency dependence of asymmetrical giant magneto��impedance (AGMI) effect in amorphous glass��covered wires annealed by 70 mA DC current is here presented. The resistance R and the reactance X have been measured, respectively. The real part R and the imaginary part X of impedance play an important role at high frequency and low frequency, respectively. The influence of DC bias current from Ib=0 mA to Ib=5 mA at 30 MHz on the GMI effect in the glass��covered wires annealed by 70 mA DC current is investigated. The asymmetry becomes the largest around Ib=1 mA, and finally decreases for the larger bias current Ib=5 mA. The maximum ��Z/Z ratio of 310% is observed at 58 MHz under 1 mA bias current.
CHEN Zheng;LI De��ren;LU Zhi��chao;ZHOU Shao��xiong;. Influence of Frequency and Bias Current on Asymmetrical GMI Effect in Co71��8Fe4��9Nb0��8Si7��5B15 Amorphous Glass��Covered Wires[J]. �й������ڿ���, 2008, 15(2): 91-0.
CHEN Zheng;LI De��ren;LU Zhi��chao;ZHOU Shao��xiong;. Influence of Frequency and Bias Current on Asymmetrical GMI Effect in Co71��8Fe4��9Nb0��8Si7��5B15 Amorphous Glass��Covered Wires. Chinese Journal of Iron and Steel, 2008, 15(2): 91-0.
2008, Vol. 15 
