Abstract
We report evidence of spontaneous formation of a heterogeneous network of superdomains in two-dimensional square artificial spin ice nanostructures in externally applied magnetic fields. Coherent resonant soft-x-ray scattering from such textures gives rise to unique internal structure in Bragg peaks. The magnetic heterogeneity is locally disordered but has a zigzag texture at longer length scales. Our result suggests that the macroscopic magnetic texture is derived from the microscopic structure of the Dirac strings.
| Original language | English |
|---|---|
| Article number | 024406 |
| Journal | Physical Review B |
| Volume | 99 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jan 7 2019 |
Bibliographical note
Funding Information:J.C.TL., R.S., P.F., and S.D.K. acknowledge support by the Director, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, of the US Department of Energy (DOE), Contract No. DE-AC02-05-CH11231 within the Nonequilibrium Magnetic Materials Program (KC2204). This research used resources of these DOE Office of Science User Facilities: the Advanced Light Source (DE-AC02-05CH11231) and the Advanced Photon Source (DE-AC02-06CH11357). Work at the University of Oregon was partially supported by DOE, Office of Basic Energy Sciences, Materials Science and Engineering Division (DE-FG02-11ER46831). Research at the University of Kentucky was supported by DOE (DE-FG02-97ER45653) and the US National Science Foundation (DMR-1506979).
Publisher Copyright:
© 2019 American Physical Society.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics