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Magnetic thin-film insulator with ultra-low spin wave damping for coherent nanomagnonics.

Yu H, Kelly Od, Cros V, Bernard R, Bortolotti P, Anane A, Brandl F, Huber R, Stasinopoulos I, Grundler D - Sci Rep (2014)

Bottom Line: Surface-acoustic-wave-based devices are found as mass market products in 100 millions of cellular phones.In addition, SWs at large wave vector are found to exhibit the non-reciprocal properties relevant for new concepts in nanoscale SW-based logics.We expect our results to provide the basis for coherent data processing with SWs at GHz rates and in large arrays of cellular magnetic arrays, thereby boosting the envisioned image processing and speech recognition.

View Article: PubMed Central - PubMed

Affiliation: Physik Department E10, Technische Universität München, James-Franck-Strasse 1, D-85748 Garching b. München, Germany.

ABSTRACT
Wave control in the solid state has opened new avenues in modern information technology. Surface-acoustic-wave-based devices are found as mass market products in 100 millions of cellular phones. Spin waves (magnons) would offer a boost in today's data handling and security implementations, i.e., image processing and speech recognition. However, nanomagnonic devices realized so far suffer from the relatively short damping length in the metallic ferromagnets amounting to a few 10 micrometers typically. Here we demonstrate that nm-thick YIG films overcome the damping chasm. Using a conventional coplanar waveguide we excite a large series of short-wavelength spin waves (SWs). From the data we estimate a macroscopic of damping length of about 600 micrometers. The intrinsic damping parameter suggests even a record value about 1 mm allowing for magnonics-based nanotechnology with ultra-low damping. In addition, SWs at large wave vector are found to exhibit the non-reciprocal properties relevant for new concepts in nanoscale SW-based logics. We expect our results to provide the basis for coherent data processing with SWs at GHz rates and in large arrays of cellular magnetic arrays, thereby boosting the envisioned image processing and speech recognition.

No MeSH data available.


Spectrum S11 taken in reflection configuration using one-and-the-same CPW at 30 mT (θ = 0).The imaginary part of the signal is shown.
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f6: Spectrum S11 taken in reflection configuration using one-and-the-same CPW at 30 mT (θ = 0).The imaginary part of the signal is shown.

Mentions: We measured absorption spectra in reflection configuration using the scattering parameters S11 or S22. Figure 6 shows a typical spectrum S11. The most prominent signal originates from the main excitation of the CPW, i.e. mode k1. The two weaker ones result from k2 and k3. The linewidth of the signal k1 is mainly caused by the broadening δk seen in I(k) of Fig. 1b near k1. The linewidth (full width at half maximum) δf of the prominent resonance amounts to about 60 MHz in Fig. 6.


Magnetic thin-film insulator with ultra-low spin wave damping for coherent nanomagnonics.

Yu H, Kelly Od, Cros V, Bernard R, Bortolotti P, Anane A, Brandl F, Huber R, Stasinopoulos I, Grundler D - Sci Rep (2014)

Spectrum S11 taken in reflection configuration using one-and-the-same CPW at 30 mT (θ = 0).The imaginary part of the signal is shown.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4213793&req=5

f6: Spectrum S11 taken in reflection configuration using one-and-the-same CPW at 30 mT (θ = 0).The imaginary part of the signal is shown.
Mentions: We measured absorption spectra in reflection configuration using the scattering parameters S11 or S22. Figure 6 shows a typical spectrum S11. The most prominent signal originates from the main excitation of the CPW, i.e. mode k1. The two weaker ones result from k2 and k3. The linewidth of the signal k1 is mainly caused by the broadening δk seen in I(k) of Fig. 1b near k1. The linewidth (full width at half maximum) δf of the prominent resonance amounts to about 60 MHz in Fig. 6.

Bottom Line: Surface-acoustic-wave-based devices are found as mass market products in 100 millions of cellular phones.In addition, SWs at large wave vector are found to exhibit the non-reciprocal properties relevant for new concepts in nanoscale SW-based logics.We expect our results to provide the basis for coherent data processing with SWs at GHz rates and in large arrays of cellular magnetic arrays, thereby boosting the envisioned image processing and speech recognition.

View Article: PubMed Central - PubMed

Affiliation: Physik Department E10, Technische Universität München, James-Franck-Strasse 1, D-85748 Garching b. München, Germany.

ABSTRACT
Wave control in the solid state has opened new avenues in modern information technology. Surface-acoustic-wave-based devices are found as mass market products in 100 millions of cellular phones. Spin waves (magnons) would offer a boost in today's data handling and security implementations, i.e., image processing and speech recognition. However, nanomagnonic devices realized so far suffer from the relatively short damping length in the metallic ferromagnets amounting to a few 10 micrometers typically. Here we demonstrate that nm-thick YIG films overcome the damping chasm. Using a conventional coplanar waveguide we excite a large series of short-wavelength spin waves (SWs). From the data we estimate a macroscopic of damping length of about 600 micrometers. The intrinsic damping parameter suggests even a record value about 1 mm allowing for magnonics-based nanotechnology with ultra-low damping. In addition, SWs at large wave vector are found to exhibit the non-reciprocal properties relevant for new concepts in nanoscale SW-based logics. We expect our results to provide the basis for coherent data processing with SWs at GHz rates and in large arrays of cellular magnetic arrays, thereby boosting the envisioned image processing and speech recognition.

No MeSH data available.