Resonance effects for different states of a circulating bubble

Author

Yanai, M. ; Friedlaender, F.J. ; Nyenhuis, J.A. ; Theile, J.

Author_Institution

Sch. of Electr. Eng., Purdue Univ., West Lafayette, IN, USA

Volume

24

Issue

6

fYear

1988

fDate

11/1/1988 12:00:00 AM

Firstpage

3054

Lastpage

3056

Abstract

The influence of an RF field superimposed on the DC bias on the tangential drive requirement of a moving bubble was measured. The bubble was maintained in continuous circular motion in a rotating gradient apparatus. With appropriate amplitude and frequency of RF field, the drive field required to move the bubble could be reduced. A minimum in the drive field occurred at an RF frequency of about 20 MHz. The measurements were performed for bubbles with and without Bloch lines. There was no discernible difference in drive field requirement between S=1 and S=0 bubbles. A harmonic oscillator model for the radial motion combined with the standard model for coercive pressure was used to calculate the expected velocity versus tangential drive relation. The principal features of the experimental results were borne out in the calculations

Keywords

garnets; magnetic bubbles; magnetic domain walls; magnetic thin films; Bloch lines; DC bias; RF field; circulating bubble; coercive pressure; drive field; garnet film; harmonic oscillator model; rotating gradient apparatus; tangential drive requirement; Conductors; Drives; Electric variables measurement; Frequency; Gradient methods; Magnetic field measurement; Magnetic materials; Performance evaluation; Resonance; Rotation measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92332

Filename

92332