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Spin Pumping in Asymmetric Fe 50 Pt 50 /Cu/Fe 20 Ni 80 Trilayer Structure
Author(s) -
Medwal Rohit,
Gupta Surbhi,
Rawat Rajdeep S.,
Subramanian Annapoorni,
Fukuma Yasuhiro
Publication year - 2019
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201900267
Subject(s) - ferromagnetic resonance , spin pumping , condensed matter physics , laser linewidth , materials science , anisotropy , precession , spin (aerodynamics) , ferromagnetism , magnetic field , magnetic anisotropy , microwave , resonance (particle physics) , magnetic damping , nuclear magnetic resonance , spin hall effect , spin polarization , atomic physics , physics , magnetization , optics , laser , quantum mechanics , thermodynamics , electron , vibration
Herein, spin transport dynamics across asymmetric Fe 50 Pt 50 /Cu/Fe 20 Ni 80 soft‐magnetic trilayer structure is reported and thereby modulation of magnetic parameters including damping and effective field is determined by means of the angular dependence of broadband ferromagnetic resonance measurements. At distinct precession of individual magnetic layer, spin‐pumping is found to be prevalent with expected linewidth increase. Mutual precession for wide range of resonance configuration reveals a collective reduction in anisotropy field of around 200 mT for both Fe 50 Pt 50 and Fe 20 Ni 80 systems. Subsequent observation of no‐excess interface damping shows the possible control of spin‐pumping effect by tuning the net flow of spin‐current in a multilayer structure. These experimental findings have significance for microwave devices that require tunable anisotropy field in magnetic multilayers.