Giant Stress-Impedance Effect in Co71.8Fe4.9Nb0.8Si7.5B15 Glass-Covered Amorphous Wires |
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| Authors: | CHEN Zheng LI De-ren LU Zhi-chao ZHOU Shao-xiong |
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| Affiliation: | 1. Université de Lyon, CNRS, France;2. INSA-Lyon, MATEIS UMR5510, F-69621 Villeurbanne, France;3. Chemistry Division, Naval Research Laboratory, Code 6120, Washington, DC 20375-5342, United States;1. Department of Materials and Optoelectronic Science, National Sun Yat-Sen University, Kaohsiung 804, Taiwan;2. School of Mechanical Engineering, Liaoning Shihua University, Fushun 113001, PR China;1. Dpto. Fisica de Materiales, Fac. Quimicas, UPV/EHU, 20009 San Sebastian, Spain;2. Dpto. de Física Aplicada, EUPDS, UPV/EHU, 20018 San Sebastian, Spain;3. National University of Science and Technology «MISIS», Moscow 119049, Russia;4. IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain |
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| Abstract: | The giant stress-impedance (GSI) effect in as-cast and DC current annealed Co71.8Fe4.9Nb0.8Si7.5B15 amorphous glass-covered wires is presented. The SI ratio of the as-cast sample exhibits negative GSI effect. For the sample annealed by 60 mA DC current, the SI ratio first increases with applied tensile stress, then decreases. The maximum ΔZ/Z ratio of 304% is obtained. Frequency dependence in the range from 1 to 110 MHz of the GSI effect is investigated. Experimental results show that the real part R and the imaginary part X of impedance play an important role at high frequency and low frequency, respectively. At 1 MHz, the maximum ΔX/X ratio of 1 448% is obtained. At 110 MHz, the maximum ΔR/R ratio of 648% is obtained. |
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| Keywords: | giant stress-impedance amorphous wire DC annealing |
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