Spin-wave excitations: the main source of the temperature dependence of interlayer exchange coupling in nanostructures |
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Authors: | Schwieger S Kienert J Lenz K Lindner J Baberschke K Nolting W |
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Institution: | Theoretische Physik I, Technische Universit?t Ilmenau, Postfach 10 05 65, 98684 Ilmenau, Germany. |
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Abstract: | Quantum mechanical calculations based on an extended Heisenberg model are compared with ferromagnetic resonance 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. |
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