ECE Department, IIIT-Delhi

Paper titled "Bilayer Synthetic Antiferromagnetic Skyrmion-Based Muller C-Element," by Jasmine Kaur, Dr. Sneh Saurabh, Dr. Shubham Sahay has been accepted in IEEE Transactions on Electron Devices, 2023. (https://lnkd.in/dp9afeQA)

Abstract: Magnetic skyrmions have emerged as promising candidates for computing and storage applications owing to their ability to behave as a particle that can be created, moved, and annihilated. However, the skyrmion Hall effect (SkHE) limits their practical application by pushing them toward the edge of the patterned device, often annihilating them. Recently, it has been demonstrated that SkHE can be suppressed in an antiferromagnetically exchange-coupled bilayer system, and skyrmions can move in a straight trajectory with higher velocities without losing information enabling reliable logic and memory devices. In this work, for the first time, the authors propose the application of notches in such synthetic antiferromagnetic (SAF) racetracks to implement the functionality of a digital latch. Furthermore, the proposed device is used to develop a Muller C-element, which can be used for Bayesian inference and asynchronous pipelines. For a proof-of-concept demonstration, the authors perform micromagnetic simulations of this SAF racetrack with notches and develop a compact Verilog-A model for the device. The circuit-level simulations of the Muller C-element are performed using the compact model. Furthermore, the authors also propose a novel read/write circuitry for the Muller C-element utilizing the Arizona State Predictive PDK (ASAP) 7-nm CMOS technology process design kit (PDK) from ARM. The comprehensive analysis of the performance metrics of the proposed Muller C-element based on the skyrmions on an SAF racetrack with notches clearly indicates significant benefits over conventional and CMOS-based implementations.

Dr. Abhijit Mitra, in collaboration with the ECE department & the Centre for Quantum Technologies, organized the Quantum Seminar series from 31st Oct to 8 Nov 2023, where a series of talks by leading academicians from all over India like Prof. G Raghavan (DIAT, Pune), Mr. Atul Gupta (CDoT, Delhi), Prof. Anirban Pathak (JIIT, Noida), Prof. R.P. Singh (PRL, Ahmedabad), Dr. Anindita Banerjee (CDAC, Pune), Dr. Amit Srivastava (DRDO, Hyderabad) were scheduled.