Abstract
Giant magnetoimpedance (GMI) and giant magnetoreactance (GMX) effects in multilayered structure ( FM/SiO2)3/ Ag /( SiO2/ FM )3( FM ≡ Fe71.5Cu1Cr2.5V4Si12B9) films have been studied. The multilayered films were deposited by radio frequency sputtering under a constant magnetic field of 900 Oe applied in the plane of the sample perpendicular to its long side (transverse direction) and then annealed under different temperatures. The maximum GMI ratio of 122% was obtained at the frequency of 4.6 MHz. The maximum value of GMX ratio and the sensitivity of GMX ratio, 2578% and 129%/Oe, were obtained in a longitudinal field case at the frequency of 1 MHz, respectively. These superior properties are related to the special structure of the multilayered films and the transverse magnetic field used in the deposition process.
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