Characterization of spin pumping effect in Permalloy/Cu/Pt microfabricated lateral devices

Journal Article · Wed May 07 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4861681· OSTI ID:22273907

Yamamoto, Tatsuya; Seki, Takeshi; Takanashi, Koki ^[1]; Ono, Shimpei ^[2]

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1. Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
2. Central Research Institute of Electric Power Industry, Tokyo 201-8511 (Japan)

We studied ferromagnetic resonance (FMR) for microfabricated lateral devices consisting of a Permalloy (Py) rectangular element and a Pt nano-element bridged by a Cu wire, which were located on a coplanar waveguide. A change in the resonance linewidth (Δf) was observed in the FMR spectra when the distance between Py and Pt (d) was varied. For devices with d < 400 nm, Δf definitely increased, suggesting the enhancement of the Gilbert damping constant (α). We discussed a possible reason for the this enhancement taking into account the increase in the efficiency of spin pumping into Cu due to the spin absorption of the attached Pt.

• OSTI ID: 22273907
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION
COPPER
DAMPING
FERROMAGNETIC RESONANCE
INTERFACES
NANOSTRUCTURES
PERMALLOY
PLATINUM
PUMPING
SPIN