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Long-range field effects on magnetic Barkhausen noise

Long-range field effects on magnetic Barkhausen noise We present findings related to the effect of long-range fields on the Barkhausen effect. The results show an internal demagnetizing effect that comes from the magnetic long-range interactions. This demagnetizing effect induces the appearance of a magnetic pattern in the region of magnetic avalanches. The produced magnetic pattern represents long three-dimensional branches located either parallel or diagonal to the applied field. The current model also reveals the presence of three different magnetization stages, in coincidence with previous experimental reports. The simulations of Barkhausen effect using long-range field is performed using a method that includes dipole-dipole interactions with boundary conditions. Finally, we analyze the critical exponents of the simulated Barkhausen jumps. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

Long-range field effects on magnetic Barkhausen noise

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Publisher
American Physical Society (APS)
Copyright
Copyright © 2007 The American Physical Society
ISSN
1550-235X
DOI
10.1103/PhysRevB.76.024406
Publisher site
See Article on Publisher Site

Abstract

We present findings related to the effect of long-range fields on the Barkhausen effect. The results show an internal demagnetizing effect that comes from the magnetic long-range interactions. This demagnetizing effect induces the appearance of a magnetic pattern in the region of magnetic avalanches. The produced magnetic pattern represents long three-dimensional branches located either parallel or diagonal to the applied field. The current model also reveals the presence of three different magnetization stages, in coincidence with previous experimental reports. The simulations of Barkhausen effect using long-range field is performed using a method that includes dipole-dipole interactions with boundary conditions. Finally, we analyze the critical exponents of the simulated Barkhausen jumps.

Journal

Physical Review BAmerican Physical Society (APS)

Published: Jul 1, 2007

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