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[Co/Pd]-CoFeB exchange spring magnets with tunable gap of spin wave excitations (Articolo in rivista)
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- [Co/Pd]-CoFeB exchange spring magnets with tunable gap of spin wave excitations (Articolo in rivista) (literal)
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- 2014-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1088/0022-3727/47/49/495004 (literal)
- Alternative label
S. Tacchi (1); T.N. Anh Nguyen (2,3); G. Gubbiotti (1); M. Madami (4); G. Carlotti (4,5); M.G. Pini (6); A. Rettori (5,7); V. Fallahi (8); R.K. Dumas (9); Johan Åkerman (2,9) (2014)
[Co/Pd]-CoFeB exchange spring magnets with tunable gap of spin wave excitations
in Journal of physics. D, Applied physics (Online)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- S. Tacchi (1); T.N. Anh Nguyen (2,3); G. Gubbiotti (1); M. Madami (4); G. Carlotti (4,5); M.G. Pini (6); A. Rettori (5,7); V. Fallahi (8); R.K. Dumas (9); Johan Åkerman (2,9) (literal)
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- This work was supported by MIUR-PRIN 2010-11 Project 2010ECA8P3 'DyNanoMag'. (literal)
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- http://iopscience.iop.org/0022-3727/47/49/495004/pdf/0022-3727_47_49_495004.pdf (literal)
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- (1) Istituto Officina dei Materiali del CNR (CNR-IOM ) - Unità di Perugia, c/o Dipartimento di Fisica e Geologia, Perugia, Italy;
(2) Materials and Nano Physics, Royal Institute of Technology (KTH), 164 40 Stokholm-Kista, Sweden;
(3) Spintronics Research Group, Laboratory for Nanotechnology, Vietnam National University, Ho Chi Minh City, Vietnam;
(4) Dipartimento di Fisica e Geologia, Università di Perugia, Perugia, Italy;
(5) Centro S3, c/o Istituto Nanoscienze del CNR (CNR-NANO), I-41125 Modena, Italy;
(6) Istituto dei Sistemi Complessi del CNR (CNR-ISC), Unità di Firenze, I-50019 Sesto Fiorentino (FI), Italy;
(7) Dipartimento di Fisica ed Astronomia, Università di Firenze, I-50019 Sesto Fiorentino (FI), Italy;
(8) Faculty of Physics, Amirkabir University of Technology, Hafez Ave., 1591634311 Tehran, Iran;
(9) Department of Physics, University of Gothenburg, 412 96 Gothenburg, Sweden (literal)
- Titolo
- [Co/Pd]-CoFeB exchange spring magnets with tunable gap of spin wave excitations (literal)
- Abstract
- Exchange spring magnets, consisting of a [Co(0.5 nm)/Pd(1 nm)]5 multilayer with perpendicular magnetic anisotropy and a Co20Fe60B20 film with easy plane anisotropy, of variable thickness tCFB, are investigated using Brillouin light scattering. On reducing tCFB in the range 0.8-2.3 nm, the spin-wave frequency gap displays a remarkable increase from nearly 4-48 GHz, reflecting the corresponding rapid growth of the tilting angle of the magnetization with respect to the film normal. These findings are interpreted using a one-dimensional model in which each atomic layer is assumed to be uniformly magnetized, subjected to an effective out-of-plane or easy-plane anisotropy depending on the layer position in the stack, and exchange coupled to its two nearest neighbour atomic layers. With respect to previously investigated [Co/Pd]-NiFe hybrid magnets, a largest frequency tunability, restricted to a narrower range of the soft layer thickness, is observed. (literal)
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