Spin wave excitations in exchange-coupled [Co/Pd]-NiFe films with tunable tilting of the magnetization

S. Tacchi, T. N. Anh Nguyen, G. Carlotti, G. Gubbiotti, M. Madami, R. K. Dumas, J. W. Lau, Johan Åkerman, A. Rettori, and M. G. Pini
Phys. Rev. B 87, 144426 – Published 30 April 2013
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Abstract

Brillouin light scattering was applied to measure the evolution of spin waves in exchange-coupled [Co/Pd]-NiFe films with out-of-plane/in-plane magnetic anisotropy. Tunable tilting of the magnetization has important effects on the spin wave frequency gap: a substantial increase is observed with decreasing the soft NiFe thickness, while seemingly insignificant tilting angles cause a strong reduction with respect to a film with only the hard [Co/Pd] component. The spin wave frequency is reproduced also in samples, with increased thickness of the upper Pd layer, where a sudden modification in the tilting at the hard/soft interface is caused by the weakening of interlayer exchange.

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  • Received 15 March 2013

DOI:https://doi.org/10.1103/PhysRevB.87.144426

©2013 American Physical Society

Authors & Affiliations

S. Tacchi1, T. N. Anh Nguyen2, G. Carlotti3,4, G. Gubbiotti1, M. Madami3, R. K. Dumas5, J. W. Lau6, Johan Åkerman2,5, A. Rettori4,7, and M. G. Pini8

  • 1Istituto Officina dei Materiali del CNR (CNR-IOM), Unità di Perugia, c/o Dipartimento di Fisica, Università di Perugia, I-06123 Perugia, Italy
  • 2Materials Physics, School of Information and Communication Technology, KTH Royal Institute of Technology, Electrum 229, 16440 Kista, Sweden
  • 3Dipartimento di Fisica, Università di Perugia, I-06123 Perugia, Italy
  • 4Centro S3, c/o Istituto Nanoscienze del CNR (CNR-NANO), I-41125 Modena, Italy
  • 5Department of Physics, University of Gothenburg, 41296 Gothenburg, Sweden
  • 6National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
  • 7Dipartimento di Fisica, Università di Firenze, I-50019 Sesto Fiorentino (FI), Italy
  • 8Istituto dei Sistemi Complessi del CNR (CNR-ISC), Unità di Firenze, I-50019 Sesto Fiorentino (FI), Italy

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Vol. 87, Iss. 14 — 1 April 2013

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