Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session A47: Proximity Effects and Spin Transport in Complex Oxides
8:00 AM–11:00 AM,
Monday, March 2, 2020
Sponsoring Units: GMAG DMP DCOMP
Chair: Qian Li, University of California, Berkeley
Abstract: A47.00009 : Current-manipulated propagation of spin waves in antiparallel coupled stripe domains of La 0.67 Sr 0.33 MnO 3 thin films
is free of Joule heating. Antiferromagnetic-type spin waves have intrinsic advantages,
such as high speed, dual- polarized and robust against external field perturbation. To
date, antiferromagnetic-type propagating spin waves excitation and manipulation have
remained challenging. Here, we demonstrate current-controlled stripe domains with
alternating upward and downward magnetization in La 0.67 Sr 0.33 MnO 3 thin films, which host
spin-wave propagation. A frequency mode around 10 GHz higher than the ordinary low-
frequency modes is observed and the dispersion of this mode is different from the low-
frequency ones. We developed a theoretical model based on two oppositely oriented
coupled domains, which accounts the high-frequency mode an effective
antiferromagnetic spin-wave mode. The spin waves can even propagate at zero
magnetic field, with group velocities of 2.6 km s -1 . The orientation of the stripe domains
can be controllably modified by an electric current pulse with a density of only 10 5 A cm -2 ,
which opens up perspectives for reconfigurable magnonic devices.
 C. Liu, S. Wu, J. Zhang, J. Chen, J. Ding, J. Ma, Y. Zhang, Y. Sun, S. Tu, H. Wang, P.
Liu, C. Li, Y. Jiang, P. Gao, D. Yu, J. Xiao, R. Duine, M. Wu, C.-W. Nan, J.-X. Zhang, H.
Yu, Current-controlled propagation of spin waves in antiparallel, coupled domains.
Nat. Nanotechnol. 14, 691-697 (2019).
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