Direct observation of isolated Damon-Eshbach and backward volume spin-wave packets in ferromagnetic microstripes.

ABSTRACT: The analysis of isolated spin-wave packets is crucial for the understanding of magnetic transport phenomena and is particularly interesting for applications in spintronic and magnonic devices, where isolated spin-wave packets implement an information processing scheme with negligible residual heat loss. We have captured microscale magnetization dynamics of single spin-wave packets in metallic ferromagnets in space and time. Using an optically driven high-current picosecond pulse source in combination with time-resolved scanning Kerr microscopy probed by femtosecond laser pulses, we demonstrate phase-sensitive real-space observation of spin-wave packets in confined permalloy (Ni80Fe20) microstripes. Impulsive excitation permits extraction of the dynamical parameters, i.e. phase- and group v

SUBMITTER: Wessels P 

PROVIDER: S-EPMC4764955 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature