Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session N57: Magnetization and Spin Dynamics I
11:30 AM–2:06 PM,
Wednesday, March 8, 2023
Room: Room 303
Sponsoring
Unit:
GMAG
Chair: Ovidiu Garlea, Oak Ridge National Lab
Abstract: N57.00007 : Symmetry-dependent ultrafast manipulation of nanoscale magnetic domains*
12:42 PM–12:54 PM
Presenter:
Nanna Zhou Hagström
(University of California, Davis)
Authors:
Nanna Zhou Hagström
(University of California, Davis)
Rahul Jangid
(University of California, Davis)
FNU Meera
(University of California, Davis)
Jeffrey A Brock
(University of California, San Diego)
Justine Schlappa
(European XFEL GmbH, Schenefeld, Germany)
Natalia Gerasimova
(European XFEL GmbH, Schenefeld, Germany)
Benjamin Van Kuiken
(European XFEL GmbH, Schenefeld, Germany)
Rafael Gort
(European XFEL GmbH, Schenefeld, Germany)
Laurent Mercadier
(European XFEL GmbH, Schenefeld, Germany)
Loïc Le Guyader
(European XFEL GmbH, Schenefeld, Germany)
Andrey Samartsev
(European XFEL GmbH, Schenefeld, Germany)
Andreas Scherz
(European XFEL GmbH, Schenefeld, Germany)
Giuseppe Mercurio
(European XFEL GmbH, Schenefeld, Germany)
Hans T Nembach
(National Institute of Standards and Technology Boulder)
Justin shaw
(National Institute of Standards and Technology Boulder)
Emmanuelle Jal
(LCPMR, Sorbonne Université, France)
Eric E Fullerton
(University of California, San Diego)
Mark W Keller
(National Institute of Standards and Technology Boulder)
Roopali Kukreja
(University of California, Davis)
Stefano Bonetti
(Stockholm Univ)
Thomas J Silva
(National Institute of Standards and Technology Boulder)
Ezio Iacocca
(University of Colorado Colorado Springs)
Collaboration:
We acknowledge our colleagues who participated in the data collection (https://arxiv.org/abs/2112.09587).
Here, we study the ultrafast response of magnetic multilayers with domain patterns with different local symmetries. Through time-resolved small angle X-ray scattering at the European XFEL and an accurate 2D fitting routing, we find a symmetry-dependent behavior of the ultrafast response. By observing an ultrafast shift in the scattering peak position for labyrinth domains, without translational symmetry, but no such shift for stripe domains, with translational symmetry, we confirm the results of previous studies2. We also study regions of the sample where both labyrinth and stripe characters are present. By isolating the isotropic and anisotropic components of the scattering, we find that only the labyrinth domains exhibit an ultrafast shift in the isotropic diffraction peak position, even in a mixed domain pattern. Our findings reveal the unpredicted dependence of the ultrafast spin dynamics on the configuration of the magnetic domains and invites further investigation on far-from-equilibrium spin transport.
1Kirilyuk, Kimel, Rasing, RevModPhys 82 (2010)
2Pfau et al., Nat Comm 3 (2012); Vodungbo et al., Nat Comm 3 (2012), Zusin et al, accepted PRB (2022); Hennes et al., PRB 102 (2020)
*N.Z.H. and S.B. acknowledge support from the European Research Council, Starting Grant 715452 MAGNETIC-SPEED-LIMIT.E.I. acknowledges the College of Letters, Arts and Sciences at UCCS for start-up support.R.J., M.M. and R.K. acknowledge support from AFOSR Grant. No. FA9550-19-1-0019.
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