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Title: Voltage controlled modification of flux closure domains in planar magnetic structures for microwave applications

Abstract

Voltage controlled modification of the magnetocrystalline anisotropy in a hybrid piezoelectric/ferromagnet device has been studied using Photoemission Electron Microscopy with X-ray magnetic circular dichroism as the contrast mechanism. The experimental results demonstrate that the large magnetostriction of the epitaxial Fe{sub 81}Ga{sub 19} layer enables significant modification of the domain pattern in laterally confined disc structures. In addition, micromagnetic simulations demonstrate that the strain induced modification of the magnetic anisotropy allows for voltage tuneability of the natural resonance of both the confined spin wave modes and the vortex motion. These results demonstrate the possibility for using voltage induced strain in low-power voltage tuneable magnetic microwave oscillators.

Authors:
; ; ; ; ;  [1]; ;  [2]
  1. School of Physics and Astronomy, The University of Nottingham, Nottingham NG7 2RD (United Kingdom)
  2. London Centre of Nanotechnology, University College London, London WC1H 0AH (United Kingdom)
Publication Date:
OSTI Identifier:
22318004
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 105; Journal Issue: 6; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANTIFERROMAGNETISM; ELECTRON MICROSCOPY; EPITAXY; GALLIUM COMPOUNDS; IRON COMPOUNDS; MAGNETOSTRICTION; MICROWAVE RADIATION; OSCILLATORS; PHOTOEMISSION; PIEZOELECTRICITY; SPIN WAVES; X RADIATION

Citation Formats

Parkes, D. E., Beardsley, R., Edmonds, K. W., Campion, R. P., Gallagher, B. L., Rushforth, A. W., E-mail: Stuart.Cavill@york.ac.uk, E-mail: Andrew.Rushforth@nottingham.ac.uk, Bowe, S., Diamond Light Source, Chilton, Didcot, Oxfordshire OX11 0DE, Isakov, I., Warburton, P. A., Cavill, S. A., E-mail: Stuart.Cavill@york.ac.uk, E-mail: Andrew.Rushforth@nottingham.ac.uk, and Diamond Light Source, Chilton, Didcot, Oxfordshire OX11 0DE. Voltage controlled modification of flux closure domains in planar magnetic structures for microwave applications. United States: N. p., 2014. Web. doi:10.1063/1.4892942.
Parkes, D. E., Beardsley, R., Edmonds, K. W., Campion, R. P., Gallagher, B. L., Rushforth, A. W., E-mail: Stuart.Cavill@york.ac.uk, E-mail: Andrew.Rushforth@nottingham.ac.uk, Bowe, S., Diamond Light Source, Chilton, Didcot, Oxfordshire OX11 0DE, Isakov, I., Warburton, P. A., Cavill, S. A., E-mail: Stuart.Cavill@york.ac.uk, E-mail: Andrew.Rushforth@nottingham.ac.uk, & Diamond Light Source, Chilton, Didcot, Oxfordshire OX11 0DE. Voltage controlled modification of flux closure domains in planar magnetic structures for microwave applications. United States. https://doi.org/10.1063/1.4892942
Parkes, D. E., Beardsley, R., Edmonds, K. W., Campion, R. P., Gallagher, B. L., Rushforth, A. W., E-mail: Stuart.Cavill@york.ac.uk, E-mail: Andrew.Rushforth@nottingham.ac.uk, Bowe, S., Diamond Light Source, Chilton, Didcot, Oxfordshire OX11 0DE, Isakov, I., Warburton, P. A., Cavill, S. A., E-mail: Stuart.Cavill@york.ac.uk, E-mail: Andrew.Rushforth@nottingham.ac.uk, and Diamond Light Source, Chilton, Didcot, Oxfordshire OX11 0DE. 2014. "Voltage controlled modification of flux closure domains in planar magnetic structures for microwave applications". United States. https://doi.org/10.1063/1.4892942.
@article{osti_22318004,
title = {Voltage controlled modification of flux closure domains in planar magnetic structures for microwave applications},
author = {Parkes, D. E. and Beardsley, R. and Edmonds, K. W. and Campion, R. P. and Gallagher, B. L. and Rushforth, A. W., E-mail: Stuart.Cavill@york.ac.uk, E-mail: Andrew.Rushforth@nottingham.ac.uk and Bowe, S. and Diamond Light Source, Chilton, Didcot, Oxfordshire OX11 0DE and Isakov, I. and Warburton, P. A. and Cavill, S. A., E-mail: Stuart.Cavill@york.ac.uk, E-mail: Andrew.Rushforth@nottingham.ac.uk and Diamond Light Source, Chilton, Didcot, Oxfordshire OX11 0DE},
abstractNote = {Voltage controlled modification of the magnetocrystalline anisotropy in a hybrid piezoelectric/ferromagnet device has been studied using Photoemission Electron Microscopy with X-ray magnetic circular dichroism as the contrast mechanism. The experimental results demonstrate that the large magnetostriction of the epitaxial Fe{sub 81}Ga{sub 19} layer enables significant modification of the domain pattern in laterally confined disc structures. In addition, micromagnetic simulations demonstrate that the strain induced modification of the magnetic anisotropy allows for voltage tuneability of the natural resonance of both the confined spin wave modes and the vortex motion. These results demonstrate the possibility for using voltage induced strain in low-power voltage tuneable magnetic microwave oscillators.},
doi = {10.1063/1.4892942},
url = {https://www.osti.gov/biblio/22318004}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 6,
volume = 105,
place = {United States},
year = {Mon Aug 11 00:00:00 EDT 2014},
month = {Mon Aug 11 00:00:00 EDT 2014}
}