Asymmetric Magneto-Impedance in CoFeSiB Amorphous Microwire |
| J. Kravčáka and R. Vargab
aDepartment of Physics, FEEI, Technical University of Košice, Košice, Slovakia bInstitute of Physics, Faculty of Sciences, UPJŠ, Park Angelinum 9, 041 54 Košice, Slovakia |
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| The symmetric dependences of magneto-impedance on the applied longitudinal dc magnetic field were measured in an amorphous CoFeSiB microwire. Additional application of a circumferential dc bias magnetic field was used to achieve the asymmetric magneto-impedance in the microwire. The obtained results are theoretically interpreted taking into account the cylindrical core-shell magnetic structure and the helical anisotropy induced during the microwire preparation. The observed very steep linear magneto-impedance dependences crossing H = 0 are promising for technical applications of the CoFeSiB microwire as a sensor of low magnetic fields. |
| DOI: 10.12693/APhysPolA.118.762 PACS numbers: 75.30.Gw, 75.50.Kj, 75.60.Ej |