Effect of parallel and antiparallel configuration on magnetic damping in Co/Ag/Co/Gd


Demirtas S., Salamon M. B. , Koymen A. R.

JOURNAL OF APPLIED PHYSICS, cilt.109, sa.11, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 109 Konu: 11
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1063/1.3592298
  • Dergi Adı: JOURNAL OF APPLIED PHYSICS

Özet

When two ferromagnetic layers have a common resonance frequency, the usual spin-pumping broadening may be reduced by dynamic exchange coupling. Utilizing the antiferromagnetic coupling between Co and Gd, we explore the change in ferromagnetic resonance accompanying a spontaneous transition from parallel to antiparallel magnetic alignment of two Co films below the compensation temperature T-comp. Above T-comp, the data are consistent with conventional models. However, a rapid doubling of magnetic damping accompanies the realignment, which is reminiscent of resistivity changes in giant magnetoresistance. (C) 2011 American Institute of Physics. [doi:10.1063/1.3592298]