Published in ProQuest Dissertations Theses Global, 2022
My thesis experimentally investigates the electrical detection and control of Néel order in insulating antiferromagnetic thin films, like 𝛼−Fe₂O₃ and NiO, aiming to advance antiferromagnetic materials application in high-speed spintronic devices.
Published in Physical Review Letters, 2022
This study characterizes spin-orbit torques (SOTs) at antiferromagnet-heavy-metal (AFM-HM) interfaces, revealing that fieldlike torques dominate over dampinglike ones in 𝛼−Fe₂O₃/Pt heterostructures, with implications for spin current manipulation in insulating AFMs.
Published in Physical Review B, 2021
This study demonstrates that electrical pulses can reversibly and irreversibly switch the Néel vector of antiferromagnetic domains in Pt/α-Fe₂O₃ structures, revealing both spin-orbit torque effects and thermal contributions to the domain changes.
Published in Nature Communications, 2023
This study introduces ultra-thin Li₀.₅Al₁.₀Fe₁.₅O₄ (LAFO) films with perpendicular magnetic anisotropy, low damping, and no dead layers, achieving efficient magnetization switching and high spin-orbit torque efficiency, thus advancing spin-based electronics.
Published in Nano Letters, 2022
This study demonstrates that ferrimagnetic Pt/CoGd/(W or Ta) films enable fast skyrmion motion with minimal deflection, reducing information loss risks and positioning ferrimagnets as promising materials for high-speed, stable skyrmion-based memory devices.
Published in Nature Communications, 2022
This study uses harmonic measurements in Pt/α-Fe₂O₃ bilayers to identify third-harmonic signals from damping-like torque and thermally-induced effects, offering a new approach to understanding current-induced switching in antiferromagnets for spintronic applications.
Published in Physical Review Applied, 2021
This study examines the temperature-dependent spin-torque switching probability in magnetic tunnel junction nanopillars, revealing that junction heating affects switching behavior below 75 K and leads to stochastic switching down to 4 K due to reduced thermal conductivity and heat capacity.
Published in Physical Review B, 2021
This study describes the controlled precession of Néel order in biaxial antiferromagnets under spin torque, showing that in-plane and normal spin polarization components can stabilize the motion, with hysteretic behavior and threshold spin currents linked to anisotropy; it also proposes a device setup for tuning terahertz nano-oscillations.
Published in AIP Advances, 2019
This study investigates spin current transport in a YIG/NiO/YIG trilayer, revealing a spin Seebeck effect (SSE) signal increase at low temperatures due to paramagnetic effects in the GGG substrate, and identifying NiO’s spin diffusion length as ∼3.8 nm, which aids understanding of spin currents in magnetic insulators.
Published in Applied Physical Letters (APL), 2019
Low-damping Mg(Al,Fe)2O4 (MAFO) magnetic insulator thin films are promising for spin current-based spintronics, showing efficient spin current injection and high spin-wave frequencies, making them versatile alternatives to YIG for spin-transfer applications.
Published in Applied Physical Letters (APL), 2018
This study presents a method combining AC and DC currents to measure the spin Seebeck effect (SSE) in YIG/Pt bilayers, showing that this approach enhances the SSE response and allows for exploration of nonlinear thermoelectric effects and spin dynamics under temperature gradients.
Published in IEEE Transactions on Electron Devices, 2016
This paper demonstrates a stable intermediate state in multilevel phase change memory (PCM) cells, achieved through nonuniform heating with a square current injection top electrode, which shows significantly reduced resistance drift and enhances the potential for reliable, high-density PCM technology.