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Driven dynamic mode-splitting of the magnetic vortex translational resonance.

Journal Article · · Phys. Rev. Lett.
A magnetic vortex in a restricted geometry possesses a nondegenerate translational excitation that corresponds to circular motion of its core at a characteristic frequency. For 40-nm thick, micron-sized permalloy elements, we find that the translational-mode microwave absorption peak splits into two peaks that differ in frequency by up to 25% as the driving field is increased. An analysis of micromagnetic equations shows that for large driving fields two stable solutions emerge.
Research Organization:
Argonne National Laboratory (ANL)
Sponsoring Organization:
NSERC Canada (Fellowship)
DOE Contract Number:
AC02-06CH11357
OSTI ID:
1000186
Report Number(s):
ANL/CNM/JA-59069
Journal Information:
Phys. Rev. Lett., Journal Name: Phys. Rev. Lett. Journal Issue: Dec. 31, 2007 Vol. 99; ISSN 1079-7114; ISSN 0031-9007
Country of Publication:
United States
Language:
ENGLISH

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