DPG Phi
Verhandlungen
Verhandlungen
DPG

Münster 1999 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

AM: Magnetismus

AM 10: Postersitzung

AM 10.35: Poster

Tuesday, March 23, 1999, 16:15–20:00, F\"urstenberghaus

Dynamical Response of Vibrating Ferromagnetic Reeds — •E. Gaganidze1, P. Esquinazi1, and M. Ziese21Abt. Supraleitung und Magnetismus, Universität Leipzig, 04103 Leipzig — 2Physics Department, University of Sheffield, Sheffield S3 7RH, United Kingdom

The resonance frequency of a ferromagnetic reed vibrating in a homogeneous field can be substantially modified by intrinsic and extrinsic field-dependent contributions. The aim of this work is the detailed study of the influence of the magnetic state and the field-sample configuration on the dynamical behavior of a ferromagnetic reed. We have measured amorphous and polycrystalline reeds in the ferromagnetic and spin-glass states and for different geometries. We show that in transversal geometry the decrease of the resonance frequency is rather independent of the material characteristics. Large changes of the field dependence of the resonance frequency are observed when the field is tilted a few degrees. With a model [1] based on the macroscopic magnetisation we can understand quantitatively the measured dependence. We discuss the contribution of magnetoelasticity and the so-called Δ E effect.

[1] E. Gaganidze and P. Esquinazi, Phys. Rev. B 56, 7823 (1997)

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 1999 > Münster