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Authors:
Sergei Gudoshnikov
Vadim Tarasov
Vadim Mashera
Vladimir Odintsov
Boris Liubimov
Yury Grebenshchikov
Keywords: amorphous ferromagnetic microwires; magnetoimpedance; temperature stability.
Abstract:
Temperature instability of the off-diagonal magnetoimpedance sensor is discussed based on experiments accomplished with Co-rich amorphous ferromagnetic microwire. The glass-coated microwire produced by the Tailor-Ulitovsky method of Co69Fe4Cr4Si11B12 composition with an internal core of 6.8 µm and a glass shell of 14.7 µm radius was tested. The magnetoimpedance sensor was a 5 mm long piece microwire with a small pick-up coil of 80 turns wounded around the microwire. The saturation magnetization, anisotropy field of the microwire and off-diagonal component of impedance at 4 MHz frequency were investigated in the temperature range of −20 to +80 C. The measured data were used to determine the influence of these parameters on the temperature dependence of the pick-up coil elecro-motive force amplitude. It was found that the change of the offset drift near the zero magnetic field is ~ 0.125 (A/m)/C and the coefficient of sensitivity is about +2.6%/ C.
Pages: 17 to 20
Copyright: Copyright (c) IARIA, 2019
Publication date: October 27, 2019
Published in: conference
ISSN: 2308-3514
ISBN: 978-1-61208-745-0
Location: Nice, France
Dates: from October 27, 2019 to October 31, 2019