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

Guslienko, Kostyantyn Y.; Kakazei, G. N.; Kobljanskyj, Yu V.; Melkov, G. A.; Novosad, V.; Slavin, A. N.

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

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

Journal Article · Thu Jun 19 00:00:00 EDT 2014 · New Journal of Physics

DOI:https://doi.org/10.1088/1367-2630/16/6/063044· OSTI ID:1577249

Guslienko, Kostyantyn Y. ^[1]; Kakazei, G. N. ^[2]; Kobljanskyj, Yu V. ^[3]; Melkov, G. A. ^[3]; Novosad, V. ^[4]; Slavin, A. N. ^[5]

Univ. del Pais Vasco, San Sebastian (Spain); IKERBASQUE, The Basque Foundation for Science Bilbao (Spain)
Univ. do Porto, Porto (Portugal); Inst. of Magnetism National Academy of Sciences of Ukraine, Kyiv (Ukraine)
Taras Shevchenko National Univ. of Kyiv, Kyiv (Ukraine)
Argonne National Lab. (ANL), Argonne, IL (United States)
Oakland Univ., Rochester, MI (United States)

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.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: Ikerbasque, Basque Foundation for Science; National Science Foundation (NSF); Spanish Ministerio de Economia y Competitividad (MINECO); USDOE Office of Defense Programs (DP), Defense Advanced Research Projects Agency (DARPA); USDOE Office of Defense Programs (DP), Department of the Army. Tank and Automotive Research, Development, and Engineering Center (TARDEC); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1577249

Alternate ID(s):: OSTI ID: 22358988

Journal Information:: New Journal of Physics, Journal Name: New Journal of Physics Journal Issue: 6 Vol. 16; ISSN 1367-2630

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
dynamical susceptibility
ferromagnetic resonance
magnetic dot
magnetic vortex
microwaves

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

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References (21)

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