TY - CHAP
T1 - Power and Phase Profiles in Nano-constriction Based Synchronized Spin Hall Nano-oscillators near Threshold Current
AU - Ronayne, William
AU - Samanta, Arindam
AU - Amann, Andreas
AU - Roy, Saibal
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Spin Hall nano-oscillators (SHNOs) demonstrate self-sustained magnetization auto-oscillations, that have recently received much attention due to their potential for cutting-edge applications. In this work, the power and phase profiles, i.e., the complex quantized propagation dynamics of nano-constriction-based spin hall nano-oscillators (SHNOs) near the threshold current have been investigated. The SHNO generates a 12 GHz microwave frequency upon application of 2 mA direct current in presence of a 0.6 T external bias magnetic field. Power profile reveals that spin wave (SW) modes are quantized along x-axis. The phase profile reveals a complex nature of the SW modes at the dominant frequency (mostly localised at the nano-constriction region and additionally propagates from centre to the edges). Whereas SW mode of other frequencies mostly propagate towards the edge from the central nano-constriction region having a complex spiral nature. The SHNO devices, which are operational at high-frequencies, can be useful in energy-efficient tuneable microwave oscillators and neuromorphic computing.
AB - Spin Hall nano-oscillators (SHNOs) demonstrate self-sustained magnetization auto-oscillations, that have recently received much attention due to their potential for cutting-edge applications. In this work, the power and phase profiles, i.e., the complex quantized propagation dynamics of nano-constriction-based spin hall nano-oscillators (SHNOs) near the threshold current have been investigated. The SHNO generates a 12 GHz microwave frequency upon application of 2 mA direct current in presence of a 0.6 T external bias magnetic field. Power profile reveals that spin wave (SW) modes are quantized along x-axis. The phase profile reveals a complex nature of the SW modes at the dominant frequency (mostly localised at the nano-constriction region and additionally propagates from centre to the edges). Whereas SW mode of other frequencies mostly propagate towards the edge from the central nano-constriction region having a complex spiral nature. The SHNO devices, which are operational at high-frequencies, can be useful in energy-efficient tuneable microwave oscillators and neuromorphic computing.
KW - Ferromagnetic (FM)/non-magnetic heavy metal (HM) bilayer heterostructures
KW - Micromagnetic Simulation
KW - Neuro- morphic Computing
KW - Spin Hall Nano-Oscillator (SHNO)
KW - Spin wave (SW)
KW - Spin-Orbit Coupling (SOC)
KW - Synchronization
UR - https://www.scopus.com/pages/publications/85172728443
U2 - 10.1109/INTERMAGShortPapers58606.2023.10228501
DO - 10.1109/INTERMAGShortPapers58606.2023.10228501
M3 - Chapter
AN - SCOPUS:85172728443
T3 - 2023 IEEE International Magnetic Conference - Short Papers, INTERMAG Short Papers 2023 - Proceedings
BT - 2023 IEEE International Magnetic Conference - Short Papers, INTERMAG Short Papers 2023 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 IEEE International Magnetic Conference - Short Papers, INTERMAG Short Papers 2023
Y2 - 15 May 2023 through 19 May 2023
ER -