Ultrafast magneto-optics in nickel: magnetism or optics?

Autor:	B Bert Koopmans, de Wjm Wim Jonge, van M Maarten Kampen, JT Jürgen Kohlhepp
Přispěvatelé:	Physics of Nanostructures, Eindhoven Hendrik Casimir institute
Rok vydání:	2000
Předmět:	Materials science Spins Magnetism business.industry Demagnetizing field General Physics and Astronomy Physics::Optics Magnetic field Optics Femtosecond Anisotropy business Ultrashort pulse Excitation
Zdroj:	Physical Review Letters, 85(4), 844-847. American Physical Society
ISSN:	1079-7114 0031-9007
Popis:	Several magnetic and optical processes contribute to the magneto-optical response of nickel thin films after excitation by a femtosecond laser pulse. We achieved a first complete identification by explicitly measuring the time-resolved Kerr ellipticity and rotation, as well as its temperature and magnetic field dependence in epitaxially grown (111) and (001) oriented Cu/Ni/Cu wedges. The first hundreds of femtoseconds the response is dominated by state filling effects. The true demagnetization takes approximately 0.5-1 ps. At the longer (sub-ns) time scales the spins are found to precess in their anisotropy field. Simple and transparent models are introduced to substantiate our interpretation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6d2f85dc335d32eb2f769c6ad845ede https://pubmed.ncbi.nlm.nih.gov/10991413 Zobrazit plný text záznamu