Welcome to Spin Dynamics Group 

Our group is working on nanomagnetism and spintronics with emphasis on spin torque induced magnetization dynamics. We are interested in the study of magnetization dynamics at the nanoscale, with a focus on spin torque nano-oscillators (SNTO) and spin Hall nano-oscillators. We are also working on spin Hall effect, spin pumping, nanoscale tiny objects called magnetic skyrmions which are very recent developments in the field of spintronics.

Recent News

29-11-2016 : IITD workshop on "Spintronics and Nanomagnetism"

29-Sept-2014: Raghav Sharma published his first paper: Mode-hopping mechanism generating colored noise in a magnetic tunnel junction based spin torque oscillator

May 2014: Sanjoy Mayanglambam, Manisha Kumari Finished their M.Tech presentation

04-Feb-2014: Paper on "Parametric excitation in a magnetic tunnel junction-based spin torque oscillator"

published in Appl. Phys. Lett. 104, 052410 (2014)

04-Feb-2014: Paper on "Generation linewidth of mode-hopping spin torque oscillators"

published in Phys. Rev. B 89, 054402 (2014) 

09-Nov-2014:  Paper on "Mutually synchronized bottom-up multi-nanocontact spin-torque oscillators" published in Nature Communication.

Paper published in Nature communications

Mutually synchronized bottom-up multi-nanocontact spin–torque oscillators

spin–torque oscillators offer a unique combination of nanosize, ultrafast modulation rates and ultrawide band signal generation from 100 MHz to close to 100 GHz. However, their low output power and large phase noise still limit their applicability to fundamental studies of spin-transfer torque and magnetodynamic phenomena. A possible solution to both problems is the spin-wave-mediated mutual synchronization of multiple spin–torque oscillators through a shared excited ferromagnetic layer. To date, synchronization of high-frequency spin–torque oscillators has only been achieved for two nanocontacts. As fabrication using expensive top–down lithography processes is not readily available to many groups, attempts to synchronize a large number of nanocontacts have been all but abandoned. Here we present an alternative, simple and cost-effective bottom-up method to realize large ensembles of synchronized nanocontact spin–torque oscillators. We demonstrate mutual synchronization of three high-frequency nanocontact spin–torque oscillators and pairwise synchronization in devices with four and five nanocontacts.