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Title: Increased magnetic damping of a single domain wall and adjacent magnetic domains detected by spin torque diode in a nanostripe

Abstract

Spin torque resonance has been used to simultaneously probe the dynamics of a magnetic domain wall and of magnetic domains in a nanostripe magnetic tunnel junction. Due to the large associated resistance variations, we are able to analyze quantitatively the resonant properties of these single nanoscale magnetic objects. In particular, we find that the magnetic damping of both the domains and the domain wall is doubled compared to the damping value of the host magnetic layer. We estimate the contributions to the damping arising from the dipolar couplings between the different layers in the junction and from the intralayer spin pumping effect, and find that they cannot explain the large damping enhancement that we observe. We conclude that the measured increased damping is intrinsic to large amplitudes excitations of spatially localized modes or solitons such as vibrating or propagating domain walls.

Authors:
; ; ; ;  [1];  [2]; ; ; ; ;  [3]; ; ;  [4]
  1. Unité Mixte de Physique CNRS/Thales and Université Paris-Sud 11, 1 Ave. A. Fresnel, 91767 Palaiseau (France)
  2. Institut d'Electronique Fondamentale, Univ. Paris-Sud, CNRS UMR 8622, Bât. 220, 91405 Orsay Cedex (France)
  3. National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568 (Japan)
  4. Process Development Center, Canon ANELVA Corporation, Kurigi 2-5-1, Asao, Kawasaki, Kanagawa 215-8550 (Japan)
Publication Date:
OSTI Identifier:
22485998
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 107; Journal Issue: 18; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMPLITUDES; DAMPING; EXCITATION; LAYERS; NANOSTRUCTURES; PUMPING; RESONANCE; SOLITONS; SPIN; TUNNEL EFFECT

Citation Formats

Lequeux, Steven, Sampaio, Joao, Bortolotti, Paolo, Cros, Vincent, Grollier, Julie, Devolder, Thibaut, Matsumoto, Rie, Yakushiji, Kay, Kubota, Hitoshi, Fukushima, Akio, Yuasa, Shinji, Nishimura, Kazumasa, Nagamine, Yoshinori, and Tsunekawa, Koji. Increased magnetic damping of a single domain wall and adjacent magnetic domains detected by spin torque diode in a nanostripe. United States: N. p., 2015. Web. doi:10.1063/1.4935203.
Lequeux, Steven, Sampaio, Joao, Bortolotti, Paolo, Cros, Vincent, Grollier, Julie, Devolder, Thibaut, Matsumoto, Rie, Yakushiji, Kay, Kubota, Hitoshi, Fukushima, Akio, Yuasa, Shinji, Nishimura, Kazumasa, Nagamine, Yoshinori, & Tsunekawa, Koji. Increased magnetic damping of a single domain wall and adjacent magnetic domains detected by spin torque diode in a nanostripe. United States. https://doi.org/10.1063/1.4935203
Lequeux, Steven, Sampaio, Joao, Bortolotti, Paolo, Cros, Vincent, Grollier, Julie, Devolder, Thibaut, Matsumoto, Rie, Yakushiji, Kay, Kubota, Hitoshi, Fukushima, Akio, Yuasa, Shinji, Nishimura, Kazumasa, Nagamine, Yoshinori, and Tsunekawa, Koji. 2015. "Increased magnetic damping of a single domain wall and adjacent magnetic domains detected by spin torque diode in a nanostripe". United States. https://doi.org/10.1063/1.4935203.
@article{osti_22485998,
title = {Increased magnetic damping of a single domain wall and adjacent magnetic domains detected by spin torque diode in a nanostripe},
author = {Lequeux, Steven and Sampaio, Joao and Bortolotti, Paolo and Cros, Vincent and Grollier, Julie and Devolder, Thibaut and Matsumoto, Rie and Yakushiji, Kay and Kubota, Hitoshi and Fukushima, Akio and Yuasa, Shinji and Nishimura, Kazumasa and Nagamine, Yoshinori and Tsunekawa, Koji},
abstractNote = {Spin torque resonance has been used to simultaneously probe the dynamics of a magnetic domain wall and of magnetic domains in a nanostripe magnetic tunnel junction. Due to the large associated resistance variations, we are able to analyze quantitatively the resonant properties of these single nanoscale magnetic objects. In particular, we find that the magnetic damping of both the domains and the domain wall is doubled compared to the damping value of the host magnetic layer. We estimate the contributions to the damping arising from the dipolar couplings between the different layers in the junction and from the intralayer spin pumping effect, and find that they cannot explain the large damping enhancement that we observe. We conclude that the measured increased damping is intrinsic to large amplitudes excitations of spatially localized modes or solitons such as vibrating or propagating domain walls.},
doi = {10.1063/1.4935203},
url = {https://www.osti.gov/biblio/22485998}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 18,
volume = 107,
place = {United States},
year = {Mon Nov 02 00:00:00 EST 2015},
month = {Mon Nov 02 00:00:00 EST 2015}
}