Spin wave excitations: The main source of the temperature dependence of Interlayer exchange coupling in nanostructures
arXiv:cond-mat/0612568 · doi:10.1103/PhysRevLett.98.057205
Abstract
Quantum mechanical calculations based on an extended Heisenberg model are compared with ferromagnetic resonance (FMR) experiments on prototype trilayer systems Ni_7/Cu_n/Co_2/Cu(001) in order to determine and separate for the first time quantitatively the sources of the temperature dependence of interlayer exchange coupling. Magnon excitations are responsible for about 75% of the reduction of the coupling strength from zero to room temperature. The remaining 25% are due to temperature effects in the effective quantum well and the spacer/magnet interfaces.
accepted for publication in PRL
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