Microwave absorption properties of permalloy nanodots in the vortex and quasi-uniform magnetization states

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Guslienko, KY (Author) Other; G.N. Kakazei (Author) FCUP; Kobljanskyj, YV (Author) Other; Melkov, GA (Author) Other; Novosad, V (Author) Other; Slavin, AN (Author) Other

Journal

Title: New Journal of Physics

Vol. 16

ISSN: 1367-2630

Publisher: Institute of Physics Publishing

Indexing

ISI Web of Knowledge - 13 Citations

Scopus - 15 Citations

Other information

Authenticus ID: P-009-N1B

DOI: 10.1088/1367-2630/16/6/063044

Abstract (EN): When the in-plane bias magnetic field acting on a flat circular magnetic dot is smaller than the saturation field, there are two stable competing magnetization configurations of the dot: the vortex and the quasi-uniform (C-state). We measured microwave absorption properties in an array of non-interacting permalloy dots in the frequency range 1-8 GHz when the in-plane bias magnetic field was varied in the region of the dot magnetization state bi-stability. We found that the microwave absorption properties in the vortex and quasi-uniform stable states are substantially different, so that switching between these states in a fixed bias field can be used for the development of reconfigurable microwave magnetic materials.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10