Single-spin spectroscopy of spontaneous and phase-locked spin torque oscillator dynamics

Autor:	Solyom, Adrian, Caouette-Mansour, Michael, Ruffolo, Brandon, Braganca, Patrick, Childress, Lilian, Sankey, Jack
Rok vydání:	2023
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Physics - Atomic Physics Quantum Physics
Druh dokumentu:	Working Paper
Popis:	We employ N-$V$ magnetometry to measure the stray field dynamics of a ferromagnetic permalloy nanowire driven by spin-orbit torques. Specifically, we observe the optically detected magnetic resonance (ODMR) signatures of both spontaneous DC-driven magnetic oscillations and phase-locking to a second harmonic drive, developing a simple macrospin model that captures the salient features. We also observe signatures of dynamics beyond the macrospin model, including an additional ODMR feature (associated with a second SW mode) and one mode sapping power from another. Our results provide additional insight into N-$V$-spin wave coupling mechanisms, and represent a new modality for sub-wavelength N-$V$ scanned probe microscopy of nanoscale magnetic oscillators. Comment: 9 pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2307.16049 Zobrazit plný text záznamu View this record from Arxiv