A novel method for time-resolved measurement of magnetization dynamics induced by femtosecond laser pulse in highly absorbing and metallic layer coated thin films based on a magnetic loop antenna
Tomáš Ilit’,
Pavol Valko,
Jozef Sitek,
Patrik Novák,
Milan Držík,
Dagmar Senderáková,
Mariana Ušáková,
Marian Marton,
Miroslav Behúl,
Martin Tomáška,
Miroslav Potočný,
Marian Vojs
Affiliations
Tomáš Ilit’
Institute of Nuclear and Physical Engineering at the Faculty of Electrical Engineering and Information Technology of Slovak University of Technology, Bratislava 812 19, Slovakia
Pavol Valko
Institute of Nuclear and Physical Engineering at the Faculty of Electrical Engineering and Information Technology of Slovak University of Technology, Bratislava 812 19, Slovakia
Jozef Sitek
Institute of Nuclear and Physical Engineering at the Faculty of Electrical Engineering and Information Technology of Slovak University of Technology, Bratislava 812 19, Slovakia
Patrik Novák
Institute of Nuclear and Physical Engineering at the Faculty of Electrical Engineering and Information Technology of Slovak University of Technology, Bratislava 812 19, Slovakia
Milan Držík
International Laser Center, Bratislava 841 04, Slovakia
Dagmar Senderáková
Department of Experimental Physics of the Faculty of Mathematics, Physics and Informatics of the Comenius University in Bratislava, Bratislava 842 48, Slovakia
Mariana Ušáková
Institute of Electrical Engineering at the Faculty of Electrical Engineering and Information Technology of the Slovak University of Technology, Bratislava 812 19, Slovakia
Marian Marton
Institute of Electronics and Photonics at the Faculty of Electrical Engineering and Information Technology of the Slovak University of Technology, Bratislava 812 19, Slovakia
Miroslav Behúl
Institute of Electronics and Photonics at the Faculty of Electrical Engineering and Information Technology of the Slovak University of Technology, Bratislava 812 19, Slovakia
Martin Tomáška
Institute of Electronics and Photonics at the Faculty of Electrical Engineering and Information Technology of the Slovak University of Technology, Bratislava 812 19, Slovakia
Miroslav Potočný
Institute of Electronics and Photonics at the Faculty of Electrical Engineering and Information Technology of the Slovak University of Technology, Bratislava 812 19, Slovakia
Marian Vojs
Institute of Electronics and Photonics at the Faculty of Electrical Engineering and Information Technology of the Slovak University of Technology, Bratislava 812 19, Slovakia
Femtosecond laser-induced magnetization dynamics is a popular research topic, due to its potential applications in fast magnetic storage devices and the field of spintronics. In the article we present a novel technique for time-resolved measurement of femtosecond laser-induced magnetization dynamics, based on inductive sensing by a loop antenna. It allows performing investigation of magnetization dynamics in highly absorbing samples, samples with patterned surfaces and samples coated by a thin metallic layer, which are difficult to study using optical techniques. To test the technique, both thick and thin films made of highly absorbing and diffusing materials, were used. Results of tests for several ferromagnetic materials including Gadolinium are discussed in the article. The test results prove that the method provides a simple tool to observe and study magnetization dynamics phenomena in the vicinity of the materials’ Curie temperature.
