Optically induced spin waves in Ni80Fe20 (permalloy) cross-shaped nanoelements are studied by time-resolved magneto-optical Kerr effect microscope. A strong anisotropy in the spin wave modes are observed with the orientation angle (ϕ) of the in-plane bias magnetic field. As ϕ deviates from 0° a single resonant mode splits into a numbers of modes, while the powers of the higher frequency modes increase as ϕ increases from 0 to 45°. The lowest frequency mode shows a four-fold configurational anisotropy. The mode of a single cross remains unaffected by the magnetostatic interaction of the neighbouring elements for ϕ = 0°, while the effect increases with ϕ and becomes maximum at 45°, making these elements interesting candidates as building blocks for magnonic devices.
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13 May 2013
Research Article|
May 13 2013
Configurational anisotropic spin waves in cross-shaped Ni80Fe20 nanoelements
B. K. Mahato;
B. K. Mahato
1
Thematic Unit of Excellence on Nanodevice Technology and Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences
, Block JD, Sector III, Salt Lake, Kolkata 700 098, India
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B. Rana;
B. Rana
1
Thematic Unit of Excellence on Nanodevice Technology and Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences
, Block JD, Sector III, Salt Lake, Kolkata 700 098, India
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R. Mandal;
R. Mandal
1
Thematic Unit of Excellence on Nanodevice Technology and Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences
, Block JD, Sector III, Salt Lake, Kolkata 700 098, India
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D. Kumar;
D. Kumar
1
Thematic Unit of Excellence on Nanodevice Technology and Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences
, Block JD, Sector III, Salt Lake, Kolkata 700 098, India
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S. Barman;
S. Barman
1
Thematic Unit of Excellence on Nanodevice Technology and Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences
, Block JD, Sector III, Salt Lake, Kolkata 700 098, India
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Y. Fukuma;
Y. Fukuma
2
Advanced Science Institute, RIKEN
, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
3
Frontier Research Academy for Young Researchers, Kyushu Institute of Technology
, lizuka, Fukuoka 820-8502, Japan
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Y. Otani;
Y. Otani
2
Advanced Science Institute, RIKEN
, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
4
Institute for Solid State Physics, University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
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Appl. Phys. Lett. 102, 192402 (2013)
Article history
Received:
March 08 2013
Accepted:
April 27 2013
Citation
B. K. Mahato, B. Rana, R. Mandal, D. Kumar, S. Barman, Y. Fukuma, Y. Otani, A. Barman; Configurational anisotropic spin waves in cross-shaped Ni80Fe20 nanoelements. Appl. Phys. Lett. 13 May 2013; 102 (19): 192402. https://doi.org/10.1063/1.4804990
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