Giant magnetoimpedance (GMI) at 10 MHz and longitudinal magnetization curves are used to investigate the anisotropy of Co68.15Fe4.35Si12.5B15 wires, glass-covered and after glass removal. The high resolution GMI response to the field shows hysteresis and large Barkhausen jumps, in good agreement with those observed in the magnetization curves. These are modeled through superposition of the response of the inner core and outer shell of the wires. The GMI response is calculated using the differential susceptibility deduced from the model, thus relating the domain structure to the observed magnetoimpedance.

Articles you may be interested inIn situ X-ray investigation of changing barrier growth temperatures on InGaN single quantum wells in metalorganic vapor phase epitaxy Ultrathin InAs/InP single quantum wells were grown by low-pressure metalorganic vapor phase epitaxy using tertiarybutylphosphine and tertiarybutylarsine, with nominal thicknesses between 2 and 3 ML. Characterization of a large number of samples by high-resolution x-ray diffraction ͑HR-XRD͒ and photoluminescence ͑PL͒ indicates an average InAs thickness very close to the nominal one. Photoluminescence excitation and absorption spectra of selected samples contain excitonic resonances associated with electron-hole transitions in 2 or 3 ML of InAs buried in InP. Only one set of these resonances appears in a given sample, thereby corroborating HR-XRD and PL measurements. Thus, our measurements indicate an absence of significant As-P intermixing.

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