B Lenk

B Obry

G Hass

H Ulrichs

H Yu

J Jorzick

M Djordjevic

M Walter

O Kolokoltsev

PB Johnson

RC O’Handley

SM Mohseni

T Satoh

VV Kruglyak

Y Au

Scientific Reports

AbstractSpatially resolved measurements of the magnetization dynamics on a thin CoFeB film induced by an intense laser pump-pulse reveal that the frequencies of resulting spin-wave modes depend strongly on the distance to the pump center. This can be attributed to a laser generated temperature profile. We determine a shift of 0.5 GHz in the spin-wave frequency due to the spatial thermal profile induced by the femtosecond pump pulse that persists for up to one nanosecond. Similar experiments are presented for a magnonic crystal composed of a CoFeB-film based antidot lattice with a Damon Eshbach mode at the Brillouin zone boundary and its consequences are discussed.</jats:p

A scenario for magnonic spin-wave traps

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