Anisotropy in collective precessional dynamics in arrays of Ni 80Fe 20 nanoelements

B. Rana; D. Kumar; S. Barman; S. Pal; R. Mandal; Y. Fukuma; Y. Otani; S. Sugimoto; A. Barman

doi:10.1063/1.3672402

Anisotropy in collective precessional dynamics in arrays of Ni ₈₀Fe ₂₀ nanoelements

B. Rana, D. Kumar, S. Barman, S. Pal, R. Mandal, Y. Fukuma, Y. Otani, S. Sugimoto, A. Barman

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

The anisotropy in the collective precessional dynamics with the variation of azimuthal angle of the bias magnetic field is studied in arrays of permalloy (Ni ₈₀Fe ₂₀) nanoelements by an all-optical time-resolved Kerr microscope. When the nanoelements are very closely spaced (inter-element separation = 50 nm), a gradual transition from completely uniform collective regime to a completely non-collective regime is observed as the azimuthal angle varies from 0° to 45°. On the other hand, for inter-element separation of 100 nm, a non-uniform collective dynamics is observed at 0° and a non-collective dynamics is observed at 45 ° but no clear trend in the transition is observed.

Original language	English
Article number	07D503
Journal	Journal of Applied Physics
Volume	111
Issue number	7
DOIs	https://doi.org/10.1063/1.3672402
Publication status	Published - 2012 Apr 1

Access to Document

10.1063/1.3672402

Cite this

@article{1d6b3ed0dcd54c3ebbfa15a5e8361e13,

title = "Anisotropy in collective precessional dynamics in arrays of Ni 80Fe 20 nanoelements",

abstract = "The anisotropy in the collective precessional dynamics with the variation of azimuthal angle of the bias magnetic field is studied in arrays of permalloy (Ni 80Fe 20) nanoelements by an all-optical time-resolved Kerr microscope. When the nanoelements are very closely spaced (inter-element separation = 50 nm), a gradual transition from completely uniform collective regime to a completely non-collective regime is observed as the azimuthal angle varies from 0° to 45°. On the other hand, for inter-element separation of 100 nm, a non-uniform collective dynamics is observed at 0° and a non-collective dynamics is observed at 45 ° but no clear trend in the transition is observed.",

author = "B. Rana and D. Kumar and S. Barman and S. Pal and R. Mandal and Y. Fukuma and Y. Otani and S. Sugimoto and A. Barman",

note = "Funding Information: We gratefully acknowledge the financial supports from Department of Science and Technology, Government of India under the grant numbers SR/NM/NS-09/2007, INT/EC/CMS (24/233552), FTP/PS-71/2007 and INT/JP/JST/P-23/09, and Japan Science and Technology Agency Strategic International Cooperative Program under the grant number 09158876.",

year = "2012",

month = apr,

day = "1",

doi = "10.1063/1.3672402",

language = "English",

volume = "111",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "7",

}

TY - JOUR

T1 - Anisotropy in collective precessional dynamics in arrays of Ni 80Fe 20 nanoelements

AU - Rana, B.

AU - Kumar, D.

AU - Barman, S.

AU - Pal, S.

AU - Mandal, R.

AU - Fukuma, Y.

AU - Otani, Y.

AU - Sugimoto, S.

AU - Barman, A.

N1 - Funding Information: We gratefully acknowledge the financial supports from Department of Science and Technology, Government of India under the grant numbers SR/NM/NS-09/2007, INT/EC/CMS (24/233552), FTP/PS-71/2007 and INT/JP/JST/P-23/09, and Japan Science and Technology Agency Strategic International Cooperative Program under the grant number 09158876.

PY - 2012/4/1

Y1 - 2012/4/1

N2 - The anisotropy in the collective precessional dynamics with the variation of azimuthal angle of the bias magnetic field is studied in arrays of permalloy (Ni 80Fe 20) nanoelements by an all-optical time-resolved Kerr microscope. When the nanoelements are very closely spaced (inter-element separation = 50 nm), a gradual transition from completely uniform collective regime to a completely non-collective regime is observed as the azimuthal angle varies from 0° to 45°. On the other hand, for inter-element separation of 100 nm, a non-uniform collective dynamics is observed at 0° and a non-collective dynamics is observed at 45 ° but no clear trend in the transition is observed.

AB - The anisotropy in the collective precessional dynamics with the variation of azimuthal angle of the bias magnetic field is studied in arrays of permalloy (Ni 80Fe 20) nanoelements by an all-optical time-resolved Kerr microscope. When the nanoelements are very closely spaced (inter-element separation = 50 nm), a gradual transition from completely uniform collective regime to a completely non-collective regime is observed as the azimuthal angle varies from 0° to 45°. On the other hand, for inter-element separation of 100 nm, a non-uniform collective dynamics is observed at 0° and a non-collective dynamics is observed at 45 ° but no clear trend in the transition is observed.

UR - http://www.scopus.com/inward/record.url?scp=84861726327&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84861726327&partnerID=8YFLogxK

U2 - 10.1063/1.3672402

DO - 10.1063/1.3672402

M3 - Article

AN - SCOPUS:84861726327

SN - 0021-8979

VL - 111

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 7

M1 - 07D503

ER -

Anisotropy in collective precessional dynamics in arrays of Ni ₈₀Fe ₂₀ nanoelements

Abstract

Access to Document

Other files and links

Fingerprint

Cite this