124 citations · 558 across the 20 of their papers we have counts for
20 papers
Magneto-Ionic Physical Reservoir Computing
Md Mahadi Rajib, Dhritiman Bhattacharya, Christopher J. Jensen +5
Recent progresses in magnetoionics offer exciting potentials to leverage its non-linearity, short-term memory, and energy-efficiency to uniquely advance the field of physical reser…
3D Interconnected Magnetic Nanowire Networks as Potential Integrated Multistate Memristors
Dhritiman Bhattacharya, Zhijie Chen, Christopher J. Jensen +6
Interconnected magnetic nanowire (NW) networks offer a promising platform for 3-dimensional (3D) information storage and integrated neuromorphic computing. Here we report discrete…
Focused Surface Acoustic Wave induced nano-oscillator based reservoir computing
Md. Fahim F. Chowdhury, Walid Al Misba, Md Mahadi Rajib +4
We demonstrate using micromagnetic simulations that a nanomagnet array excited by Surface Acoustic Waves (SAWs) can work as a reservoir that can classify sine and square waves with…
Surface Acoustic Wave induced modulation of tunneling magnetoresistance in magnetic tunnel junctions
Dhritiman Bhattacharya, Peng Sheng, Md Ahsanul Abeed +6
We show that a surface acoustic wave (SAW) applied across the terminals of a magnetic tunnel junction (MTJ) decreases both the (time-averaged) parallel and antiparallel resistances…
Passive frustrated nanomagnet reservoir computing
Alexander J. Edwards, Dhritiman Bhattacharya, Peng Zhou +10
Reservoir computing (RC) has received recent interest because reservoir weights do not need to be trained, enabling extremely low-resource consumption implementations, which could…
Robust skyrmion mediated reversal of ferromagnetic nanodots of 20 nm lateral dimension with high Ms and moderate DMI
Md Mahadi Rajib, Walid Al Misba, Dhritiman Bhattacharya +1
Implementation of skyrmion based energy efficient and high-density data storage devices requires aggressive scaling of skyrmion size. Ferrimagnetic materials are considered to be a…
Voltage Controlled Energy Efficient Domain Wall Synapses with Stochastic Distribution of Quantized Weights in the Presence of Thermal Noise and Edge Roughness
Walid Al Misba, Tahmid Kaisar, Dhritiman Bhattacharya +1
We propose energy efficient strain control of domain wall (DW) in a perpendicularly magnetized nanoscale racetrack on a piezoelectric substrate that can implement multi state synap…
Dynamic Skyrmion-Mediated Switching of Perpendicular MTJs: Scaling to 20 nm with Thermal Noise
Md Mahadi Rajib, Walid Al Misba, Dhritiman Bhattacharya +2
One method of creating and annihilating skyrmions in confined geometries is to use Voltage-Controlled Magnetic Anisotropy (VCMA) [1, 2, 3]. Previous study shows that robust voltage…
Acoustic Wave Induced FMR Assisted Spin-Torque Switching of Perpendicular MTJs with Anisotropy Variation
Walid Al Misba, Md. Mahadi Rajib, Dhritiman Bhattacharya +1
We have investigated Surface Acoustic Wave (SAW) induced ferromagnetic resonance (FMR) assisted Spin Transfer Torque (STT) switching of perpendicular MTJ (p-MTJ) with inhomogeneiti…
Resonant Acoustic Wave Assisted Spin-Transfer-Torque Switching of Nanomagnets
Austin Roe, Dhritiman Bhattacharya, Jayasimha Atulasimha
We report the possibility of achieving an order of magnitude reduction in the energy dissipation needed to write bits in perpendicular magnetic tunnel junctions (p-MTJs) by simulat…
Voltage control of domain walls in magnetic nanowires for energy efficient neuromorphic devices
Md Ali Azam, Dhritiman Bhattacharya, Damien Querlioz +2
An energy-efficient voltage controlled domain wall device for implementing an artificial neuron and synapse is analyzed using micromagnetic modeling in the presence of room tempera…
Experimental creation and annihilation of nonvolatile magnetic skyrmions using voltage control of magnetic anisotropy without an external magnetic field
Dhritiman Bhattacharya, Seyed Armin Razavi, Hao Wu +3
In this work, we utilize voltage controlled magnetic anisotropy (VCMA) to manipulate magnetic skyrmions that are fixed in space. Memory devices based on this strategy can potential…
Energy-efficient switching of nanomagnets for computing: Straintronics and other methodologies
Noel D'Souza, Ayan Biswas, Hasnain Ahmad +7
The need for increasingly powerful computing hardware has spawned many ideas stipulating, primarily, the replacement of traditional transistors with alternate "switches" that dissi…
Resonate and Fire Neuron with Fixed Magnetic Skyrmions
Md. Ali Azam, Dhritiman Bhattacharya, Damien Querlioz +1
In the brain, the membrane potential of many neurons oscillates in a subthreshold damped fashion and fire when excited by an input frequency that nearly equals their eigen frequenc…
Polarized Neutron Reflectometry Study of Depth Dependent Magnetization Variation in Co Thin Film on a PMN-PT Substrate
Md Mamun Al-Rashid, Alexander Grutter, Brian Kirby +1
We studied the depth dependent magnetization profile of the magnetostrictive Co thin film layer in a PMN-PT (011)/Ta/Co/Ta structure under both zero and nonzero applied electric fi…
Skyrmion mediated voltage controlled switching of ferromagnets for reliable and energy efficient 2-terminal memory
Dhritiman Bhattacharya, Jayasimha Atulasimha
We propose a two terminal nanomagnetic memory element based on magnetization reversal of a perpendicularly magnetized nanomagnet employing a unipolar voltage pulse that modifies th…
Energy efficient and fast reversal of a fixed skyrmions with spin current assisted by voltage controlled magnetic anisotropy
Dhritiman Bhattacharya, Md. Mamun Al-Rashid, Jayasimha Atulasimha
Recent work [1,2] suggests that ferromagnetic reversal with spin transfer torque (STT) requires more current in a system in the presence of DMI than switching a typical ferromagnet…
Voltage controlled core reversal of fixed magnetic skyrmions without a magnetic field
Dhritiman Bhattacharya, Md Mamun Al-Rashid, Jayasimha Atulasimha
Using micromagnetic simulations we demonstrate core reversal of a fixed magnetic skyrmion by modulating the perpendicular magnetic anisotropy of a nanomagnet with an electric field…
Switching the magnetization of magnetostrictive nanomagnets from single-domain to non-volatile vortex states with a surface acoustic wave
Vimal Sampath, Noel ďSouza, Dhritiman Bhattacharya +3
We report manipulation of the magnetic states of elliptical cobalt magnetostrictive nanomagnets (of nominal dimensions ~ 340 nm x 270 nm x 12 nm) delineated on bulk 128° Y-cut lith…
Incoherent magnetization dynamics in strain mediated switching of magnetostrictive nanomagnets
Dhritiman Bhattacharya, Md Mamun Al-Rashid, Noel D'Souza +2
Micromagnetic studies of the magnetization change in magnetostrictive nanomagnets subjected to stress are performed for nanomagnets of different sizes. The interplay between demagn…