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Anomalous effects in the domain-wall dynamics in magnetic microwires

✍ Scribed by Varga, Rastislav ;Infante, German ;Richter, Kornel ;Vazquez, Manuel

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
346 KB
Volume
208
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

In the present contribution, we deal with two anomalous effects that have been found in magnetic microwires during the domain‐wall dynamics study. First, there is a negative critical propagation field H~0~. Its frequency and temperature dependence is dealt in terms of two domain‐wall potential minima separated by the energy barrier. Secondly, it is a negative domain‐wall mobility S that appears as a result of stabilization of the domain structure through the structural relaxation. The domain‐wall mobility can be tuned from negative to positive values by properly setting measuring condition (frequency of applied magnetic field, temperature). This gives us also the possibility to obtain the domain‐wall dynamics that is not sensitive to the applied magnetic field H.

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