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| 001 | 901910 | ||
| 005 | 20230126125751.0 | ||
| 024 | 7 | _ | |a 10.1103/PhysRevB.104.054430 |2 doi |
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| 100 | 1 | _ | |a Cao, Derang |0 P:(DE-Juel1)177876 |b 0 |e Corresponding author |u fzj |
| 245 | _ | _ | |a Coherent GHz lattice and magnetization excitations in thin epitaxial Ag/Fe/Cr/Fe films |
| 260 | _ | _ | |a Woodbury, NY |c 2021 |b Inst. |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a We excited an epitaxial magnetic Ag/Fe/Cr/Fe multilayer nonthermally and nonoptically with very short (<1 ps) electromagnetic pulses. We detected the synchronous phononic-magnetic response by time-resolved magneto-optical Kerr effect measurements. The Ag/Fe/Cr/Fe multilayer was patterned into a coplanar waveguide transmission line, and the electromagnetic pulses were generated by pulsed-laser illumination of an integrated GaAs photoconductive switch (PCS). The detected magnetic excitations comprise up to four narrow-band high-order modes with the highest frequency reaching 30 GHz. The mode frequencies are independent of both temperature in the range from 16 to 300 K and the applied external magnetic field up to 120 mT. Our analysis shows that the origin of the rigidity of these high-frequency modes is the strong coupling of the magnetic subsystem with the lattice of the Ag/Fe/Cr/Fe multilayer. The exciting electromagnetic pulse generated by the PCS induces, via magnetoelastic coupling, long-lived (ns) standing GHz acoustic waves normal to the Ag/Fe/Cr/Fe film plane. These lattice oscillations in turn couple back and drive the magnetization oscillations via the magnetoelastic coupling. The temperature and field dependence of the damping of the oscillations can be described by inelastic phonon-phonon and phonon-magnon scattering. Our study opens up a possibility of using coherent lattice and magnetization dynamics in ferromagnetic films for spintronic devices at GHz clock rates. |
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| 700 | 1 | _ | |a Greb, Christian |0 P:(DE-Juel1)173666 |b 9 |
| 700 | 1 | _ | |a Schneider, Claus M. |0 P:(DE-Juel1)130948 |b 10 |
| 773 | _ | _ | |a 10.1103/PhysRevB.104.054430 |g Vol. 104, no. 5, p. 054430 |0 PERI:(DE-600)2844160-6 |n 5 |p 054430 |t Physical review / B |v 104 |y 2021 |x 2469-9969 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/901910/files/PhysRevB.104.054430.pdf |y OpenAccess |
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