Title: All-optical probe of coherent spin waves
Authors: Van Kampen, M
Jozsa, C
Kohlhepp, J T
LeClair, P
Lagae, Lieven
De Jonge, W J M
Koopmans, B #
Issue Date: Jun-2002
Series Title: Physical review letters vol:88 issue:22 pages:227201
Abstract: A novel, all-optical method to excite and detect spin waves in magnetic materials is presented. By exploiting the temperature dependence of the magnetic anisotropy, an ultrashort laser pulse is efficiently converted in a picosecond "anisotropy field" pulse that triggers a coherent precession of the magnetization. Recording the temporal evolution of the precessing spins by a time-delayed probe-pulse provides a quantitative method to study locally the magnetic anisotropy, as well as switching and damping phenomena in micromagnetic structures. Applications to nickel and permalloy ( Ni80Fe20) films are discussed, particularly showing the possibility to explore standing spin waves in thin films.
ISSN: 0031-9007
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Brain & Metabolism Section (-)
# (joint) last author

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