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Title: Temporal Evolution of Auto-Oscillations in an Yttrium-Iron-Garnet/Platinum Microdisk Driven by Pulsed Spin Hall Effect-Induced Spin-Transfer Torque

Abstract

The temporal evolution of pulsed spin Hall effect-spin transfer torque (SHE-STT) driven auto-oscillations in a yttrium iron garnet (YIG)-platinum (Pt) microdisk is studied experimentally using time-resolved Brillouin light scattering spectroscopy. The frequency of the auto-oscillations is different in the center when compared to the edge of the disk and is related to the simultaneous STT excitation of a bullet and a non-localized spin-wave mode. Furthermore, the magnetization precession intensity saturates on a time scale of 20 ns or longer, depending on the current density. For this reason, our findings suggest that a proper ratio between the current and the pulse duration is of crucial importance for future STT-based devices.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [1]; ORCiD logo [1]
  1. Technische Univ. Kaiserslautern, Kaiserslautern (Germany). Fachbereich Physik and Landesforschungszentrum (OPTIMAS)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Materials Science and Engineering
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1536625
Grant/Contract Number:  
SC0001299
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
IEEE Magnetics Letters
Additional Journal Information:
Journal Volume: 8; Journal Issue: none; Journal ID: ISSN 1949-307X
Publisher:
IEEE
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Engineering; Physics; Current density; Magnetization; Damping; Image edge detection; Torque; Oscillators; Gold

Citation Formats

Lauer, Viktor, Schneider, Michael, Meyer, Thomas, Bracher, Thomas, Pirro, Philipp, Heinz, Bjorn, Heussner, Frank, Lagel, Bert, Onbasli, Mehmet C., Ross, Caroline A., Hillebrands, Burkard, and Chumak, Andrii V. Temporal Evolution of Auto-Oscillations in an Yttrium-Iron-Garnet/Platinum Microdisk Driven by Pulsed Spin Hall Effect-Induced Spin-Transfer Torque. United States: N. p., 2017. Web. doi:10.1109/lmag.2017.2661243.
Lauer, Viktor, Schneider, Michael, Meyer, Thomas, Bracher, Thomas, Pirro, Philipp, Heinz, Bjorn, Heussner, Frank, Lagel, Bert, Onbasli, Mehmet C., Ross, Caroline A., Hillebrands, Burkard, & Chumak, Andrii V. Temporal Evolution of Auto-Oscillations in an Yttrium-Iron-Garnet/Platinum Microdisk Driven by Pulsed Spin Hall Effect-Induced Spin-Transfer Torque. United States. https://doi.org/10.1109/lmag.2017.2661243
Lauer, Viktor, Schneider, Michael, Meyer, Thomas, Bracher, Thomas, Pirro, Philipp, Heinz, Bjorn, Heussner, Frank, Lagel, Bert, Onbasli, Mehmet C., Ross, Caroline A., Hillebrands, Burkard, and Chumak, Andrii V. 2017. "Temporal Evolution of Auto-Oscillations in an Yttrium-Iron-Garnet/Platinum Microdisk Driven by Pulsed Spin Hall Effect-Induced Spin-Transfer Torque". United States. https://doi.org/10.1109/lmag.2017.2661243. https://www.osti.gov/servlets/purl/1536625.
@article{osti_1536625,
title = {Temporal Evolution of Auto-Oscillations in an Yttrium-Iron-Garnet/Platinum Microdisk Driven by Pulsed Spin Hall Effect-Induced Spin-Transfer Torque},
author = {Lauer, Viktor and Schneider, Michael and Meyer, Thomas and Bracher, Thomas and Pirro, Philipp and Heinz, Bjorn and Heussner, Frank and Lagel, Bert and Onbasli, Mehmet C. and Ross, Caroline A. and Hillebrands, Burkard and Chumak, Andrii V.},
abstractNote = {The temporal evolution of pulsed spin Hall effect-spin transfer torque (SHE-STT) driven auto-oscillations in a yttrium iron garnet (YIG)-platinum (Pt) microdisk is studied experimentally using time-resolved Brillouin light scattering spectroscopy. The frequency of the auto-oscillations is different in the center when compared to the edge of the disk and is related to the simultaneous STT excitation of a bullet and a non-localized spin-wave mode. Furthermore, the magnetization precession intensity saturates on a time scale of 20 ns or longer, depending on the current density. For this reason, our findings suggest that a proper ratio between the current and the pulse duration is of crucial importance for future STT-based devices.},
doi = {10.1109/lmag.2017.2661243},
url = {https://www.osti.gov/biblio/1536625}, journal = {IEEE Magnetics Letters},
issn = {1949-307X},
number = none,
volume = 8,
place = {United States},
year = {2017},
month = {1}
}

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Magnonic crystals for data processing
journal, May 2017