Measurement of the intrinsic damping constant in individual nanodisks of Y3Fe5O12 and Y3Fe5O12|Pt

Hahn, Christian and Naletov, V. V. and Loubens, Grégoire de and Klein, Olivier and Allivy Kelly, Olivier d' and Anane, Abdelmadjid and Bernard, Rozenn and Jacquet, Eric and Bortolotti, Paolo and Cros, Vincent and Prieto Martin, Jose Luis and Muñoz Sanchez, Manuel (2014). Measurement of the intrinsic damping constant in individual nanodisks of Y3Fe5O12 and Y3Fe5O12|Pt. "Applied Physics Letters", v. 104 (n. 15); pp.. ISSN 0003-6951. https://doi.org/10.1063/1.4871516.

Description

Title: Measurement of the intrinsic damping constant in individual nanodisks of Y3Fe5O12 and Y3Fe5O12|Pt
Author/s:
  • Hahn, Christian
  • Naletov, V. V.
  • Loubens, Grégoire de
  • Klein, Olivier
  • Allivy Kelly, Olivier d'
  • Anane, Abdelmadjid
  • Bernard, Rozenn
  • Jacquet, Eric
  • Bortolotti, Paolo
  • Cros, Vincent
  • Prieto Martin, Jose Luis
  • Muñoz Sanchez, Manuel
Item Type: Article
Título de Revista/Publicación: Applied Physics Letters
Date: April 2014
ISSN: 0003-6951
Volume: 104
Subjects:
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Electrónica Física
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

We report on an experimental study on the spin-waves relaxation rate in two series of nanodisks of diameter ϕ=300 , 500, and 700 nm, patterned out of two systems: a 20 nm thick yttrium iron garnet (YIG) film grown by pulsed laser deposition either bare or covered by 13 nm of Pt. Using a magnetic resonance force microscope, we measure precisely the ferromagnetic resonance linewidth of each individual YIG and YIG|Pt nanodisks. We find that the linewidth in the nanostructure is sensibly smaller than the one measured in the extended film. Analysis of the frequency dependence of the spectral linewidth indicates that the improvement is principally due to the suppression of the inhomogeneous part of the broadening due to geometrical confinement, suggesting that only the homogeneous broadening contributes to the linewidth of the nanostructure. For the bare YIG nano-disks, the broadening is associated to a damping constant α=4 × 10−4 . A threefold increase of the linewidth is observed for the series with Pt cap layer, attributed to the spin pumping effect. The measured enhancement allows to extract the spin mixing conductance found to be G↑↓=1.55 × 1014 Ω−1 m−2 for our YIG(20nm)|Pt interface, thus opening large opportunities for the design of YIG based nanostructures with optimized magnetic losses.

More information

Item ID: 35908
DC Identifier: http://oa.upm.es/35908/
OAI Identifier: oai:oa.upm.es:35908
DOI: 10.1063/1.4871516
Official URL: http://scitation.aip.org/content/aip/journal/apl/104/15/10.1063/1.4871516
Deposited by: Memoria Investigacion
Deposited on: 28 Jun 2015 10:17
Last Modified: 28 Jun 2015 10:17
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