Regensburg 2016 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 17: Poster Session I
MA 17.38: Poster
Dienstag, 8. März 2016, 09:30–12:30, Poster B1
Study of the magnetic properties of spin waves in thin Yttrium Iron Garnet films. — •Oleksandr Talalaevskyy1, Martin Decker1, Johannes Stigloher1, Arpita Mitra2, Christian Back1, and Bryan Hickey2 — 1University of Regensburg, Regensburg, Germany — 2University of Leeds,Leeds, UK
Yttrium Iron Garnet (Y3Fe5O12) is one of the most promising materials for studying high frequency magnetization dynamics. Due to its extremely low Gilbert damping parameter which can reach values of 1*10-5 for YIG spheres.Experiments with spin waves propagation are very important for understanding magnetization dynamics. In particular interest has recently increased since thin YIG films of reasonably high quality can nowadays be prepared by pulsed layer deposition or sputter deposition. Thin YIG can be used for effective excitation of the autooscillations by running a current through a Pt layers deposited on top of the film. We present an experimental study of the spin wave excitation and propagation in YIG stripes prepared by the magnetron sputtering. We report the time resolved magneto-optic Kerr effect measurements of spin waves(SW) parameters in thin YIG films. The mode structure of the spin waves is studied in dependence on the external magnetic film thickness and width of the stripe. We are able to detect a SW signal for distances up to 150 μm away from the CPW for narrow (2 μm) stripes.We calculate the spin wave attenuation length of the first mode for 50 nm and 40 nm thick samples. Furthermore we study the dependence of the maximal spin wave propagation length as function of the width of the stripe.