4.8 Article

Damping in Yttrium Iron Garnet Nanoscale Films Capped by Platinum

Journal

PHYSICAL REVIEW LETTERS
Volume 111, Issue 10, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.106601

Keywords

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Funding

  1. U.S. National Science Foundation [ECCS-1231598]
  2. U.S. Army Research Office [W911NF-12-1-0518, W911NF-11-C-0075]
  3. U.S. National Institute of Standards and Technology [60NANB10D011]
  4. U.S. Department of Energy, Office of Basic Energy Sciences [DE-AC02-06CH11357]
  5. Natural Sciences and Engineering Research Council of Canada
  6. Canadian Institute for Advanced Research
  7. Direct For Mathematical & Physical Scien
  8. Division Of Materials Research [906489] Funding Source: National Science Foundation
  9. Directorate For Engineering
  10. Div Of Electrical, Commun & Cyber Sys [1231598] Funding Source: National Science Foundation

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Strong damping enhancement in nm-thick yttrium iron garnet (YIG) films due to Pt capping layers was observed. This damping is substantially larger than the expected damping due to conventional spin pumping, is accompanied by a shift in the ferromagnetic resonance field, and can be suppressed by the use of a Cu spacer in between the YIG and Pt films. The data indicate that such damping may originate from the ferromagnetic ordering in Pt atomic layers near the YIG/Pt interface and the dynamic exchange coupling between the ordered Pt spins and the spins in the YIG film.

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