Effect of the strong coupling on the exchange bias field in IrMn/Py/Ru/Co spin valves

H. S. Tarazona, W. Alayo, C. V. Landauro, J. Quispe-Marcatoma

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

7 Citas (Scopus)

Resumen

The IrMn/Py/Ru/Co (Py = Ni81Fe19) spin valves have been produced by sputtering deposition and analyzed by magnetization measurements and a theoretical modelling of their exchange interactions, based on the macro-spin model. The Ru thickness was grown between 6 and 22 Å, which is small enough to promote strong indirect coupling between Py and Co. Results of measurements showed a large and gradual change in the shape of hysteresis loops when the Ru thickness was varied. The theoretical analysis, using numerical calculations based on the gradient conjugate method, provides the exchange coupling constants (bilinear and biquadratic), the exchange anisotropy fields and the magnetic anisotropy fields (uniaxial and rotatable). The exchange bias fields of spin valves were compared to that of a IrMn/Py bilayer. We found that the difference between these fields oscillates with Ru thickness in the same manner as the bilinear coupling constants.

Idioma originalInglés
Páginas (desde-hasta)44-48
Número de páginas5
PublicaciónJournal of Magnetism and Magnetic Materials
Volumen446
DOI
EstadoPublicada - 15 ene. 2018
Publicado de forma externa

Nota bibliográfica

Publisher Copyright:
© 2017 Elsevier B.V.

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