Magneto Acoustic Spin Hall Oscillators

Abstract This paper introduces a novel oscillator that combines the tunability of spin Hall-driven nano oscillators with the high quality factor (Q) of high overtone bulk acoustic wave resonators (HBAR), integrating both reference and tunable oscillators on the same chip with CMOS. In such magneto a...

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Autores principales:	Mustafa Mert Torunbalci, Tanay Arun Gosavi, Kerem Yunus Camsari, Sunil Ashok Bhave
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/005d809f9030491ba3b4406e879ffa43
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spelling	oai:doaj.org-article:005d809f9030491ba3b4406e879ffa432021-12-02T11:41:23ZMagneto Acoustic Spin Hall Oscillators10.1038/s41598-018-19443-62045-2322https://doaj.org/article/005d809f9030491ba3b4406e879ffa432018-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-19443-6https://doaj.org/toc/2045-2322Abstract This paper introduces a novel oscillator that combines the tunability of spin Hall-driven nano oscillators with the high quality factor (Q) of high overtone bulk acoustic wave resonators (HBAR), integrating both reference and tunable oscillators on the same chip with CMOS. In such magneto acoustic spin Hall (MASH) oscillators, voltage oscillations across the magnetic tunnel junction (MTJ) that arise from a spin-orbit torque (SOT) are shaped by the transmission response of the HBAR that acts as a multiple peak-bandpass filter and a delay element due to its large time constant, providing delayed feedback. The filtered voltage oscillations can be fed back to the MTJ via (a) strain, (b) current, or (c) magnetic field. We develop a SPICE-based circuit model by combining experimentally benchmarked models including the stochastic Landau-Lifshitz-Gilbert (sLLG) equation for magnetization dynamics and the Butterworth Van Dyke (BVD) circuit for the HBAR. Using the self-consistent model, we project up to ~50X enhancement in the oscillator linewidth with Q reaching up to 52825 at 3 GHz, while preserving the tunability by locking the STNO to the nearest high Q peak of the HBAR. We expect that our results will inspire MEMS-based solutions to spintronic devices by combining attractive features of both fields for a variety of applications.Mustafa Mert TorunbalciTanay Arun GosaviKerem Yunus CamsariSunil Ashok BhaveNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mustafa Mert Torunbalci Tanay Arun Gosavi Kerem Yunus Camsari Sunil Ashok Bhave Magneto Acoustic Spin Hall Oscillators
description	Abstract This paper introduces a novel oscillator that combines the tunability of spin Hall-driven nano oscillators with the high quality factor (Q) of high overtone bulk acoustic wave resonators (HBAR), integrating both reference and tunable oscillators on the same chip with CMOS. In such magneto acoustic spin Hall (MASH) oscillators, voltage oscillations across the magnetic tunnel junction (MTJ) that arise from a spin-orbit torque (SOT) are shaped by the transmission response of the HBAR that acts as a multiple peak-bandpass filter and a delay element due to its large time constant, providing delayed feedback. The filtered voltage oscillations can be fed back to the MTJ via (a) strain, (b) current, or (c) magnetic field. We develop a SPICE-based circuit model by combining experimentally benchmarked models including the stochastic Landau-Lifshitz-Gilbert (sLLG) equation for magnetization dynamics and the Butterworth Van Dyke (BVD) circuit for the HBAR. Using the self-consistent model, we project up to ~50X enhancement in the oscillator linewidth with Q reaching up to 52825 at 3 GHz, while preserving the tunability by locking the STNO to the nearest high Q peak of the HBAR. We expect that our results will inspire MEMS-based solutions to spintronic devices by combining attractive features of both fields for a variety of applications.
format	article
author	Mustafa Mert Torunbalci Tanay Arun Gosavi Kerem Yunus Camsari Sunil Ashok Bhave
author_facet	Mustafa Mert Torunbalci Tanay Arun Gosavi Kerem Yunus Camsari Sunil Ashok Bhave
author_sort	Mustafa Mert Torunbalci
title	Magneto Acoustic Spin Hall Oscillators
title_short	Magneto Acoustic Spin Hall Oscillators
title_full	Magneto Acoustic Spin Hall Oscillators
title_fullStr	Magneto Acoustic Spin Hall Oscillators
title_full_unstemmed	Magneto Acoustic Spin Hall Oscillators
title_sort	magneto acoustic spin hall oscillators
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/005d809f9030491ba3b4406e879ffa43
work_keys_str_mv	AT mustafamerttorunbalci magnetoacousticspinhalloscillators AT tanayarungosavi magnetoacousticspinhalloscillators AT keremyunuscamsari magnetoacousticspinhalloscillators AT sunilashokbhave magnetoacousticspinhalloscillators
_version_	1718395380514684928

Magneto Acoustic Spin Hall Oscillators

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