A quantum material spintronic resonator

Journal Article · 22 July 2021 · Scientific Reports

DOI: https://doi.org/10.1038/s41598-021-93404-4 · OSTI ID:1816162

Xu, Jun-Wen ^[1]; Chen, Yizhang ^[2]; Vargas, Nicolás M. ^[3]; Salev, Pavel ^[3]; Lapa, Pavel N. ^[3]; Trastoy, Juan ^[4]; Grollier, Julie ^[4]; Schuller, Ivan K. ^[3]; Kent, Andrew D. ^[2]

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1. New York Univ. (NYU), NY (United States). Dept. of Physics. Center for Quantum Phenomena; OSTI
2. New York Univ. (NYU), NY (United States). Dept. of Physics. Center for Quantum Phenomena
3. Univ. of California, San Diego, La Jolla, CA (United States). Dept. of Physics. Center for Advanced Nanoscience
4. Université Paris-Saclay, Palaiseau (France). Centre National de la Recherche Scientifique (CNRS). Unité Mixte de Physique

In a spintronic resonator a radio-frequency signal excites spin dynamics that can be detected by the spin-diode effect. Such resonators are generally based on ferromagnetic metals and their responses to spin torques. New and richer functionalities can potentially be achieved with quantum materials, specifically with transition metal oxides that have phase transitions that can endow a spintronic resonator with hysteresis and memory. Here we present the spin torque ferromagnetic resonance characteristics of a hybrid metal-insulator-transition oxide/ ferromagnetic metal nanoconstriction. Our samples incorporate V₂O₃, with Ni, Permalloy (Ni₈₀Fe₂₀) and Pt layers patterned into a nanoconstriction geometry. The first order phase transition in V₂O₃ is shown to lead to systematic changes in the resonance response and hysteretic current control of the ferromagnetic resonance frequency. Further, the output signal can be systematically varied by locally changing the state of the V₂O₃ with a dc current. These results demonstrate new spintronic resonator functionalities of interest for neuromorphic computing.

• Research Organization: Energy Frontier Research Centers (EFRC) (United States). Quantum Materials for Energy Efficient Neuromorphic Computing (Q-MEEN-C); New York Univ. (NYU), NY (United States); Univ. of California, San Diego, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: SC0019273
• OSTI ID: 1816162
• Journal Information: Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 11; ISSN 2045-2322
• Publisher: Nature Publishing GroupCopyright Statement
• Country of Publication: United States
• Language: English