Noninvasive magnetic imaging and magnetization measurement of isolated mesoscopic Co rings
- 22 October 2002
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 81 (18) , 3413-3415
- https://doi.org/10.1063/1.1518564
Abstract
A high-resolution scanning Hall probe microscope was used as a noninvasive technique to visualize the magnetization reversal in an array of micron-size Co rings. Two stable “onion” states at remanence and “vortex” states at switching fields were found. To rule out a possible influence of dipole–dipole interaction between ring elements on remagnetization processes, an isolated Co ring was deposited on top of a Hall magnetometer and extremely sharp transitions from onion to vortex and from vortex to onion state of opposite polarity were resolved. Our results were supported by MOKE magnetization measurements and micromagnetic simulations.Keywords
This publication has 11 references indexed in Scilit:
- Hall-magnetometry on ferromagnetic dots and dot arraysIEEE Transactions on Magnetics, 2001
- Flux Closure Structures in Cobalt RingsPhysical Review Letters, 2001
- Computational study of first magnetization curves in small ringsIEEE Transactions on Magnetics, 2000
- Ultrahigh density vertical magnetoresistive random access memory (invited)Journal of Applied Physics, 2000
- Switching fluctuations and density limitations of pseudospin valve memoryJournal of Applied Physics, 2000
- Property variation with shape in magnetic nanoelementsJournal of Physics D: Applied Physics, 1999
- Single-Domain Circular NanomagnetsPhysical Review Letters, 1999
- Ballistic Hall micromagnetometryApplied Physics Letters, 1997
- Real-time scanning Hall probe microscopyApplied Physics Letters, 1996
- Scanning Hall probe microscopyApplied Physics Letters, 1992