Voltage control of spin resonance in phase change materials
arXiv:2406.11679 · doi:10.1021/acs.nanolett.4c02697
Abstract
Metal-insulator transitions (MITs) in resistive switching materials can be triggered by an electric stimulus that produces significant changes in the electrical response. When these phases have distinct magnetic characteristics, dramatic changes in spin excitations are also expected. The transition metal oxide La0.7Sr0.3MnO3 (LSMO) is a ferromagnetic metal at low temperatures and a paramagnetic insulator above room temperature. When LSMO is in its metallic phase a critical electrical bias has been shown to lead to an MIT that results in the formation of a paramagnetic resistive barrier transverse to the applied electric field. Using spin-transfer ferromagnetic resonance spectroscopy, we show that even for electrical biases less than the critical value that triggers the MIT, there is magnetic phase separation with the spin-excitation resonances varying systematically with applied bias. Thus, applied voltages provide a means to alter spin resonance characteristics of interest for neuromorphic circuits.
References in corpus (14)
- Biological plausibility and stochasticity in scalable VO2 active memristor neurons
- Challenges in materials and devices for Resistive-Switching-based Neuromorphic Computing
- Non-linear electrical response in a non-charge-ordered manganite: Pr0.8Ca0.2MnO3
- Electrical Breakdown in a V2O3 device at the Insulator to Metal Transition
- Spin transport and dynamics in all-oxide perovskite LaSrMnO/SrRuO bilayers probed by ferromagnetic resonance
- Current oscillation and low-field colossal magnetoresistance effect in phase-separated manganites
- Resistive switching in reverse: voltage driven formation of a transverse insulating barrier
- Current localization and Joule self-heating effects in Cr doped Nd0.5Ca0.5MnO3 manganites
- Direct observation of the electrically triggered Insulator-Metal transition in V3O5 far below the transition temperature
- Easy-plane spin Hall nano-oscillators as spiking neurons for neuromorphic computing
- Hybrid spin Hall nano-oscillators based on ferromagnetic metal/ferrimagnetic insulator heterostructures
- Charge-to-spin conversion efficiency in ferromagnetic nanowires by spin torque ferromagnetic resonance: Reconciling lineshape and linewidth analysis methods
- Voltage-controlled magnetism enabled by resistive switching
- Magnetoresistance anomaly during the electrical triggering of a metal-insulator transition