A theoretical investigation of Ferromagnetic Resonance Linewidth and damping constants in coupled trilayer and spin valve systems | Zendy

A. Layadi | Zendy

Open Access

A theoretical investigation of Ferromagnetic Resonance Linewidth and damping constants in coupled trilayer and spin valve systems

Author(s) -

A. Layadi

Publication year - 2015

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4920940

Subject(s) - laser linewidth , condensed matter physics , ferromagnetic resonance , ferromagnetism , antiferromagnetism , spin valve , materials science , resonance (particle physics) , spin (aerodynamics) , anisotropy , coupling (piping) , field (mathematics) , coupling constant , magnetic anisotropy , physics , magnetic field , magnetization , quantum mechanics , thermodynamics , laser , pure mathematics , metallurgy , mathematics

The ferromagnetic resonance intrinsic field linewidth ΔH is investigated for a multilayer system such as a coupled trilayer and a spin valve structure. The magnetic coupling between two ferromagnetic layers separated by a nonmagnetic interlayer will be described by the bilinear J1 and biquadratic J2 coupling parameters. The interaction at the interface of the first ferromagnetic layer with the antiferromagnetic one is account for by the exchange anisotropy field, HE. A general formula is derived for the intrinsic linewidth ΔH. The explicit dependence of ΔH with HE, J1 and J2 will be highlighted. Analytical expressions for each mode field linewidth are found in special cases. Equivalent damping constants will be discussed

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