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Thesis: Magneto-elastic transient grating spectroscopy of normal metal/ferromagnetic metal multilayers

D.N. Zwaan, (2017) Thesis: Magneto-elastic transient grating spectroscopy of normal metal/ferromagnetic metal multilayers. Master's Thesis / Essay, Applied Physics.

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Spintronics has become an increasingly popular and important topic, not only in science but in technical applications as well. The use of the spin degrees of freedom offers up exciting discoveries and designs. In this experiment, a non-contact transient grating (TG) spectroscopy method is used to inspect spin dynamics in metallic multilayers that result from ferromagnetic resonance (FMR). Due to the direct generation of sound waves in the sample, magneto-elastic effects excite spin precession in the ferromagnetic layer and possibly external relaxation in the other layers. Using a detection scheme based on Faraday rotation of a probe beam, the magnetization component normal to the sample surface is measured directly and in real time with a temporal resolution in the order of picoseconds. The data is examined in the framework of spin currents and intrinsic and extrinsic relaxation mechanisms, but proved inconclusive on the part of magnetization. Therefore, a future experiment is proposed that should solve the issues found with this experiment.

Item Type: Thesis (Master's Thesis / Essay)
Degree programme: Applied Physics
Thesis type: Master's Thesis / Essay
Language: English
Date Deposited: 15 Feb 2018 08:30
Last Modified: 15 Feb 2018 08:30

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