Acoustic spin pumping in magnetoelectric bulk acoustic wave resonator

We present the generation and detection of spin currents by using magnetoelastic resonance excitation in a magnetoelectric composite high overtone bulk acoustic wave (BAW) resonator (HBAR) formed by a Al-ZnO-Al-GGG-YIG-Pt structure. Transversal BAW drives magnetization oscillations in YIG film at a...

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Bibliographic Details
Published in:AIP advances 2016-05, Vol.6 (5), p.056306-056306-6
Main Authors: Polzikova, N. I., Alekseev, S. G., Pyataikin, I. I., Kotelyanskii, I. M., Luzanov, V. A., Orlov, A. P.
Format: Article
Language:English
Subjects:
Acoustic resonance
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Dependence
DETECTION
ELECTRIC FIELDS
Electric potential
Electrical measurement
ELECTRICAL PROPERTIES
Excitation
FERRITE GARNETS
FERROMAGNETIC RESONANCE
Ferromagnetism
HALL EFFECT
INTERFACES
IRON OXIDES
LAYERS
MAGNETIC FIELD REVERSAL
MAGNETIC FIELDS
MAGNETIC PROPERTIES
Magnetism
MAGNETIZATION
MICROWAVE RADIATION
OSCILLATIONS
RESONATORS
SOUND WAVES
Spintronics
Surface acoustic waves
SURFACES
Zinc oxide
ZINC OXIDES
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Summary:We present the generation and detection of spin currents by using magnetoelastic resonance excitation in a magnetoelectric composite high overtone bulk acoustic wave (BAW) resonator (HBAR) formed by a Al-ZnO-Al-GGG-YIG-Pt structure. Transversal BAW drives magnetization oscillations in YIG film at a given resonant magnetic field, and the resonant magneto-elastic coupling establishes the spin-current generation at the Pt/YIG interface. Due to the inverse spin Hall effect (ISHE) this BAW-driven spin current is converted to a dc voltage in the Pt layer. The dependence of the measured voltage both on magnetic field and frequency has a resonant character. The voltage is determined by the acoustic power in HBAR and changes its sign upon magnetic field reversal. We compare the experimentally observed amplitudes of the ISHE electrical field achieved by our method and other approaches to spin current generation that use surface acoustic waves and microwave resonators for ferromagnetic resonance excitation, with the theoretically expected values.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4943765