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
Publisher Copyright:© 2019 American Physical Society.
Funding
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).
| Funders | Funder number |
|---|---|
| U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China | 1506979, DMR-1506979 |
| U.S. Department of Energy Oak Ridge National Laboratory U.S. Department of Energy National Science Foundation National Energy Research Scientific Computing Center | DE-AC02-05-CH11231, KC2204 |
| National Science Foundation Office of International Science and Engineering | |
| DOE Basic Energy Sciences | |
| Division of Materials Sciences and Engineering | DE-FG02-97ER45653, DE-FG02-11ER46831 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics