Magnetization dynamics of a CrO${}_2$ grain studied by micro-Hall magnetometry

Abstract

Micro-Hall magnetometry is employed to study the magnetization dynamics of a single, micron-size CrO${}_2$ grain. With this technique we track the motion of a single domain wall, which allows us to probe the distribution of imperfections throughout the material. An external magnetic field along the grain's easy magnetization direction induces magnetization reversal, giving rise to a series of sharp jumps in magnetization. Supported by micromagnetic simulations, we identify the transition to a state with a single cross-tie domain wall, where pinning/depinning of the wall results in stochastic Barkhausen jumps.

References in corpus (5)

• Band Structure and Transport Properties of CrO_2
• Subatomic movements of a domain wall in the Peierls potential
• Magnetization Switching in Nanowires: Monte Carlo Study with Fast Fourier Transformation for Dipolar Fields
• Statistical Mechanics of Nonuniform Magnetization Reversal
• Resolution-dependent mechanisms for bimodal switching-time distributions in simulated Fe nanopillars

Cited by in corpus (5)

• Direct-write of free-form 3D nanostructures with controlled magnetic frustration
• Spontaneous Dissociation of Co2(CO)8 and Autocatalytic growth of Co on SiO2 : A Combined Experimental and Theoretical Investigation
• Magnetization reversal of dipolar coupled nanomagnets studied by two-dimensional electron gas based micro-Hall magnetometry
• On the influence of nanometer-thin antiferromagnetic surface layer on ferromagnetic CrO${}_2$
• Domain wall dynamics in a single CrO${}_2$ grain