S C
IE N
T IF
IC H
IG H
LI G
H T
S M
A T
E R
IA L
S F
O R
T O
M O
R R
O W
'S I
N N
O V
A T
IV E
A N
D S
U S
T A
IN A
B L
E I
N D
U S
T R
Y
8 3 I H I G H L I G H T S 2 0 2 3
PRINCIPAL PUBLICATION AND AUTHORS
Long-lived spin waves in a metallic antiferromagnet, G. Poelchen (a,b,c), J. Hellwig (d), M. Peters (d), D. Yu. Usachov (e), K. Kliemt (d), C. Laubschat (b), P.M. Echenique (e,f), E. V. Chulkov (e,g,h), C. Krellner (d), S.S.P. Parkin (i), D.V. Vyalikh (e,f), A. Ernst (i,j), K. Kummer (a), Nat. Commun. 14, 5422 (2023); https:/doi.org/10.1038/s41467-023-40963-x (a) ESRF (b) Institut für Festkörper- und Materialphysik, Technische Universität Dresden, Dresden (Germany) (c) Max Planck Institute for Chemical Physics of Solids, Dresden (Germany) (d) Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt (Germany) (e) Donostia International Physics Center (DIPC), Donostia-San Sebastián (Spain) (f) IKERBASQUE, Basque Foundation for Science, Bilbao (Spain) (g) Centro de Física de Materiales (CFM-MPC), Centro Mixto CSIC-UPV/EHU, Donostia-San Sebastián (Spain) (h) Departamento de Polímeros y Materiales Avanzados: Física, Química y Tecnología, Facultad de Ciencias Químicas, Universidad del País Vasco UPV/EHU, Donostia-San Sebastián (Spain) (i) Max-Planck-Institut für Mikrostrukturphysik, Halle (Germany) (j) Institut für Theoretische Physik, Johannes Kepler Universität, Linz (Austria)
REFERENCES
[1] Y.Y. Peng et al., Nat. Phys. 13, 1201 (2017). [2] K. Ishii et al., Nat. Commun. 5, 3714 (2014). [3] I. Bertelli et al., Adv. Quantum Technol. 4, 2100094 (2021).
With the experimental demonstration of very long- lived spin-waves at frequencies up to at least 50 THz and temperatures up to at least room temperature in a metallic magnetic, this study shows that effective spin- wave propagation and long spin-wave lifetimes at THz frequencies may not only occur in magnetic insulators but
also in magnetic metals. Metallic magnets may therefore have an important role to play in spintronic devices, for instance, in the integration of spintronic with classic electronic circuits relying on electric current transport, or as substitutes for the strongly damping metal parts used in current spintronic devices [3].
Fig. 63: Top: Observation of sharp spin-wave excitations in the metallic antiferromagnet CeCo2P2 up to very high energies. Bottom: Spin-wave frequencies and lifetimes in CeCo2P2 compared to other metallic magnets.
