Magnetic domain state diagnosis using hysteresis reversal curves
Авторы: Zhao X., Roberts A., Heslop D., Paterson G.
We present results for a series of hysteresis measurements that provide information about
remanent, induced, transient-free, and transient magnetization components. These measurements, and
differences between measurement types, enable production of six types of first-order reversal curve
(FORC)-like diagrams which only double the number of measurements involved in a conventional FORC
measurement. These diagrams can be used to distinguish magnetic signatures associated with each domain
state. When analyzing samples with complex magnetic mineral mixtures, the contrasting domain state
signatures are mixed together in a traditional FORC diagram, but these signatures can be identified
individually when using the various FORC diagrams discussed here. The ability to make different FORC
measurements and to identify separately each magnetic component by investigating different
magnetization types can provide much-improved understanding of the information provided by FORC
diagrams. In particular, the transient hysteresis FORC diagram provides a method to measure the nucleation
field of magnetic vortices and domain walls. We provide a simple explanation for FORC results from
natural multidomain samples that are not explained by conventional domain wall pinning models. We
also provide software for processing the different types of FORC data.