Barkhausen noise from formation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mn>360</mml:mn><mml:mo>∘</mml:mo></mml:msup></mml:math>domain walls in disordered permalloy thin films

Abstract

Micromagnetic simulations reveal formation of 360${}^{\ensuremath{\circ}}$ domain walls in disordered, thin permalloy films during the field-driven magnetic reversal process. With stronger disorder, the reversal process is increasingly governed by discontinuous jumps, resulting in Barkhausen noise without explicit domain wall movement.

Topics & Concepts