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Magnetoelasticity of Co 25Fe 75 thin films

Authors
  • Schwienbacher, Daniel1, 2, 3
  • Pernpeintner, Matthias1, 2
  • Liensberger, Lukas1, 2
  • Edwards, Eric R. J.4
  • Nembach, Hans T.4
  • Shaw, Justin M.4
  • Weiler, Mathias1, 2
  • Gross, Rudolf1, 2, 3
  • Huebl, Hans1, 2, 3
  • 1 Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, Walther Meissner Str. 8, 85748 Garching, Germany
  • 2 Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
  • 3 Munich Center for Quantum Science and Technology (MCQST), Schellingstraße 4, 80799 München, Germany
  • 4 National Institute of Standards and Technology, Boulder, Colorado 80305, USA
Type
Published Article
Journal
Journal of Applied Physics
Publisher
American Institute of Physics
Publication Date
Jan 01, 2019
Volume
126
Identifiers
PMID: 33149369
PMCID: PMC7607915
Source
PubMed Central
Disciplines
  • Article
License
Unknown

Abstract

We investigate the magnetoelastic properties of Co25Fe75 and Co10Fe90 thin films by measuring the mechanical properties of a doubly clamped string resonator covered with multilayer stacks containing these films. For the magnetostrictive constants, we find λ Co25Fe75 = (−20.68 ± 0.25) × 10−6 and λ Co10Fe90 = (−9.80 ± 0.12) × 10−6 at room temperature, in contrast to the positive magnetostriction previously found in bulk CoFe crystals. Co25Fe75 thin films unite low damping and sizable magnetostriction and are thus a prime candidate for micromechanical magnonic applications, such as sensors and hybrid phonon-magnon systems.

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