Giant magneto-impedance effect in CoMnSiB amorphous microwires |
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| Institution: | 1. Departamento de Fisica Aplicada I and Departamento de Electrónica y Telecomunicaciones, EUITI, Universidad del Pais Vasco, Avda Felipe IV 1B, 20011 San Sebastián, Spain;2. Donostia International Physics Centre, P. M. De Lardizabal, 4, 20018 San Sebastián, Spain;3. “TAMag” S.L., c/ Jose Abascal 53, Madrid, Spain;4. Departamento de Fisica de Materiales, Facultad de Qu??mica, Universidad del Pais Vasco, P.O. Box 1072, 20080 San Sebastián, Spain;1. Microelectronics and Materials Physics Laboratories, University of Oulu, P.O. Box 4500, FIN-90014 Oulu, Finland;2. Advanced Materials Department, Jo?ef Stefan Institute, Jamova cesta 36, SI-1000 Ljubljana, Slovenia;1. Research Center for Solid State Physics and Materials, School of Mathematics and Physics, Suzhou University of Science and Technology, Suzhou 215009, China;2. Department of Chemistry, Moscow State University, Leninskie Gory, House 1, Building 3, GSP-2, Moscow 119992, Russia;1. Institute of Physics Slovak Academy of Sciences, Dúbravskácesta 9, 845 11 Bratislava, Slovakia;2. Institute of Electronics and Photonics FEI SUT, Ilkovi?ova 3, 812 19 Bratislava, Slovakia;1. Division of Functional Materials, Central Iron and Steel Research Institute, Beijing 100081, China;2. Key Laboratory of National Education Ministry for Electromagnetic Processing of Materials, Northeastern University, Shenyang 110819, China;3. School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China |
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| Abstract: | The giant magneto-impedance (GMI) ratio, ΔZ/Z=(Z(H)?Z(Hmax)]/Z(Hmax), in a nearly zero magnetostrictive Co68.5Mn6.5Si10B15 amorphous microwire has been investigated for the frequency range 0.5–10 MHz, driving current amplitude of 0.5–2.5 mA, bias DC magnetic field up to 2400 A/m and under applied tensile stress up to 132 MPa. A maximum relative change in the GMI ratio up to around 130% is observed at a frequency of 10 MHz, magnetic DC field of about 180 A/m, driving current amplitude of 1 mA and under tension of 60 MPa. The tensile stress dependence of the magnetic field, Hm, corresponding to the maximum ΔZ/Z ratio allows to estimate the magnetostriction constant (λs≈?2×10?7) to be in good agreement with λs values estimated by different methods and in amorphous alloys with similar compositions. |
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