Tunable spin wave dynamics in two-dimensional Ni{sub 80}Fe{sub 20} nanodot lattices by varying dot shape

Mahato, Bipul Kumar; Rana, Bivas; Kumar, Dheeraj; Barman, Saswati; Barman, Anjan; Sugimoto, Satoshi; Otani, YoshiChika

doi:10.1063/1.4890088

Title: Tunable spin wave dynamics in two-dimensional Ni{sub 80}Fe{sub 20} nanodot lattices by varying dot shape

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Abstract

We demonstrate tunable spin wave spectrum in two-dimensional Ni{sub 80}Fe{sub 20} nanodot lattices by varying dot shape. A single collective mode in elliptical dot lattices transforms into three distinct modes for the half-elliptical, rectangular, and diamond dot lattices, albeit with different peak frequencies and intensities. A drastic change is observed for the triangular dots, where eight modes covering a broad band are observed. Using micromagnetic simulations, we characterized the modes as different localized, extended, and quantized modes, whose frequencies and spatial profiles are determined by a combination of internal field profiles within the nanodots and the stray magnetic field within the lattice.

Authors:

Mahato, Bipul Kumar; Rana, Bivas; Kumar, Dheeraj; Barman, Saswati; Barman, Anjan ^[1]; Sugimoto, Satoshi ^[2]; Otani, YoshiChika ^[2]

Thematic Unit of Excellence on Nanodevice Technology, Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700098 (India)
Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581 (Japan)

Publication Date:: Mon Jul 07 00:00:00 EDT 2014

OSTI Identifier:: 22303947

Resource Type:: Journal Article

Journal Name:: Applied Physics Letters

Additional Journal Information:: Journal Volume: 105; Journal Issue: 1; Other Information: (c) 2014 AIP Publishing LLC; 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; COVERINGS; CRYSTAL DEFECTS; DIAMONDS; IRON ALLOYS; MAGNETIC FIELDS; NICKEL ALLOYS; QUANTUM DOTS; SIMULATION; SPECTRA; SPIN WAVES

Citation Formats


                    Mahato, Bipul Kumar, Rana, Bivas, Kumar, Dheeraj, Barman, Saswati, Barman, Anjan, Sugimoto, Satoshi, Otani, YoshiChika, and CEMS-RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198. Tunable spin wave dynamics in two-dimensional Ni{sub 80}Fe{sub 20} nanodot lattices by varying dot shape.  United States: N. p., 2014. 
        Web.  doi:10.1063/1.4890088.

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                    Mahato, Bipul Kumar, Rana, Bivas, Kumar, Dheeraj, Barman, Saswati, Barman, Anjan, Sugimoto, Satoshi, Otani, YoshiChika, & CEMS-RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198. Tunable spin wave dynamics in two-dimensional Ni{sub 80}Fe{sub 20} nanodot lattices by varying dot shape.  United States.  https://doi.org/10.1063/1.4890088

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                    Mahato, Bipul Kumar, Rana, Bivas, Kumar, Dheeraj, Barman, Saswati, Barman, Anjan, Sugimoto, Satoshi, Otani, YoshiChika, and CEMS-RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198. 2014.  
        "Tunable spin wave dynamics in two-dimensional Ni{sub 80}Fe{sub 20} nanodot lattices by varying dot shape".  United States.  https://doi.org/10.1063/1.4890088.

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@article{osti_22303947,

  title        = {Tunable spin wave dynamics in two-dimensional Ni{sub 80}Fe{sub 20} nanodot lattices by varying dot shape},

  author       = {Mahato, Bipul Kumar and Rana, Bivas and Kumar, Dheeraj and Barman, Saswati and Barman, Anjan and Sugimoto, Satoshi and Otani, YoshiChika and CEMS-RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198},

  abstractNote = {We demonstrate tunable spin wave spectrum in two-dimensional Ni{sub 80}Fe{sub 20} nanodot lattices by varying dot shape. A single collective mode in elliptical dot lattices transforms into three distinct modes for the half-elliptical, rectangular, and diamond dot lattices, albeit with different peak frequencies and intensities. A drastic change is observed for the triangular dots, where eight modes covering a broad band are observed. Using micromagnetic simulations, we characterized the modes as different localized, extended, and quantized modes, whose frequencies and spatial profiles are determined by a combination of internal field profiles within the nanodots and the stray magnetic field within the lattice.},

  doi          = {10.1063/1.4890088},

  url          = {https://www.osti.gov/biblio/22303947},
  journal      = {Applied Physics Letters},

  issn         = {0003-6951},

  number       = 1,

  volume       = 105,

  place        = {United States},

  year         = {Mon Jul 07 00:00:00 EDT 2014},

  month        = {Mon Jul 07 00:00:00 EDT 2014}

}

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