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Multiangle combined magnetic‐field annealing of Co‐based amorphous microwires for sensor applications
Author(s) -
Liu JingShun,
Zhang DaYue,
Cao FuYang,
Xing DaWei,
Chen DongMing,
Xue Xiang,
Sun JianFei
Publication year - 2012
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201127538
Subject(s) - materials science , amorphous solid , annealing (glass) , magnetic field , anisotropy , nuclear magnetic resonance , optics , composite material , physics , chemistry , crystallography , quantum mechanics
The effect of multiangle combined magnetic‐field annealing (MCMFA) on the GMI performance of melt‐extracted Co‐based amorphous microwires for sensor applications is studied using a precision impedance analyzer. Experimental results indicated that MCMFA treatment can effectively improve the GMI effect comparing with as‐cast and conventional vacuum‐annealed (CVA) wires. The maximum GMI ratio [Δ Z / Z max ] max and field response sensitivity ξ max of transverse combined magnetic‐field annealed (TCMFA, α = 90°) wires can be increased at 10 MHz to 310.7 and 30.91%/Oe, respectively, through with circumferential anisotropy field expanded and GMI changed from single peak (SP) to double peaks (DPs). DPs behavior of TCMFA wire is due to the typically “nail‐sticked” action of magnetic moment rotation at relatively high frequency (up to ≥1 MHz). It can therefore be concluded that MCMFA could be used to develop Co‐based microwires with enhanced GMI effect for high‐resolution sensor applications.