Skip to main content
eScholarship
Open Access Publications from the University of California

Disorder-induced microscopic magnetic memory.

  • Author(s): Pierce, M S
  • Buechler, C R
  • Sorensen, L B
  • Turner, J J
  • Kevan, S D
  • Jagla, E A
  • Deutsch, J M
  • Mai, T
  • Narayan, O
  • Davies, J E
  • Liu, K
  • Dunn, J Hunter
  • Chesnel, K M
  • Kortright, J B
  • Hellwig, O
  • Fullerton, E E
  • et al.
Abstract

Using coherent x-ray speckle metrology, we have measured the influence of disorder on major loop return point memory (RPM) and complementary point memory (CPM) for a series of perpendicular anisotropy Co/Pt multilayer films. In the low disorder limit, the domain structures show no memory with field cycling--no RPM and no CPM. With increasing disorder, we observe the onset and the saturation of both the RPM and the CPM. These results provide the first direct ensemble-sensitive experimental study of the effects of varying disorder on microscopic magnetic memory and are compared against the predictions of existing theories.

Many UC-authored scholarly publications are freely available on this site because of the UC Academic Senate's Open Access Policy. Let us know how this access is important for you.

Main Content
Current View