Element-Specific Magnetization Dynamics in Co–Pt Alloys Induced by Strong Optical Excitation

نویسندگان

چکیده

Ever since its first observation, the microscopic origin of ultrafast magnetization dynamics has been actively debated. Even more questions arise when considering composite materials featuring a combination intrinsic and proximity-induced magnetic moments. Currently, it is unknown whether specific different sublattices in popular ferromagnets consisting 3d (Co, Fe) 4d, 5d (Pd, Pt) transition metals are playing crucial role various effects, including all-optical switching. Here we investigate element-specific Co–Pt alloys on femtosecond picosecond time scales using magneto-optical spectroscopy extended ultraviolet (EUV) region. Our results reveal that despite nature Pt atoms, two alloy can have responses to optical excitation distinct demagnetization rates. Additionally show important consider modification anisotropy opto-magnetic experiments as vast majority them sensitive only single projection moment predefined axis, which may lead experimental artifacts.

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ژورنال

عنوان ژورنال: Journal of Physical Chemistry C

سال: 2021

ISSN: ['1932-7455', '1932-7447']

DOI: https://doi.org/10.1021/acs.jpcc.1c02311