Barkhausen pulse structure in an amorphous ferromagnet: Characterization by high-order spectra
نویسندگان
چکیده
Frequency-dependent third and fourth moments of the Barkhausen signal from a soft amorphous ferromagnet are measured. The data indicate strong coupling between the power in different frequency bands. The sign of the time asymmetry of a third-order voltage correlation indicates that the high-frequency Barkhausen events, on average, systematically precede the low-frequency Barkhausen events. The results are inconsistent with several commonly employed models. @S1063-651X~98!10205-2#
منابع مشابه
Dependence of Barkhausen pattern reproducibility on hysteresis loop size
The Barkhausen pattern from the amorphous alloy Fe21Co64B15 showed high sweep-to-sweep reproducibility for most sweeps when driven slowly over a minor hysteresis loop. Small changes in the maximum applied field led to completely different pulse patterns. When driven near saturation the sweep-to-sweep reproducibility was lost. Large features observed on rapid sweeps were also reproducible, but n...
متن کاملPreparation and Characterization of Aluminum Nitride Thin Films with the Potential Application in Electro-Acoustic Devices
In this work, aluminum nitride (AlN) thin films with different thicknesses were deposited on quartz and silicon substrates using single ion beam sputtering technique. The physical and chemical properties of prepared films were investigated by different characterization technique. X-ray diffraction (XRD) spectra revealed that all of the deposited films have an amorphous str...
متن کاملAbstract Submitted for the MAR05 Meeting of The American Physical Society Barkhausen Noise, Domain Structure and Entropy in Magnetic Amorphous Ribbons Under Stress ALBERTO GUIMARAES, Centro Bras. Pesq. Fisicas (CBPF), ANDRE GUNDEL, UFSM, LUCIANA SANTI, UFSM,
Submitted for the MAR05 Meeting of The American Physical Society Barkhausen Noise, Domain Structure and Entropy in Magnetic Amorphous Ribbons Under Stress ALBERTO GUIMARAES, Centro Bras. Pesq. Fisicas (CBPF), ANDRE GUNDEL, UFSM, LUCIANA SANTI, UFSM, RUBEM SOMMER, UFSM — The effect of applied stress on the magnetization process of magnetostrictive Fe78B13Si9 and amorphous Fe73.5Cu1Nb3Si13.5B9 me...
متن کاملبررسی کارایی سیلیکا آئروژل سنتز شده از سیلیکات سدیم در جذب فنل از محیط های آبی
Background and Objectives: Phenol is a toxic and persistent substance in the environment. The aim of this study was to evaluate the performance of silica aerogel synthesized using sodium silicate in the adsorption of phenol from aqueous solutions. Material and Method: Silica aerogel was prepared by Sol-Gel process. The influence of effective variables such contact time, initial pH of the sol...
متن کاملShape of a Barkhausen Pulse
The average shape of the pulse in Barkhausen noise has been recently proposed as a tool to compare models and experiments. We compute theoretically the pulse shape of Barkhausen noise in a model describing the motion of a domain wall in an effective Brownian potential. In this framework, the pulse shape is related to the properties of the excursion of a random process in a c log(x)− kx potentia...
متن کامل