Applied magnetism and interfacial exchange coupling in magnetic hetero-structure

Speaker : Antarjami Sahoo

Venue : HSB 210 (S.N.Bose Hall: Physics)

Date : 9 th March, 2018

Time : 5.30 p.m.

Abstract

The cutting edge technology along with the fertile theoretical understanding have enabled us to explore and utilise the magnetic materials in all dimensions for the wellbeing of mankind. They have found application in many diverse areas, such as: electric motors and generators, magnetic resonance imaging, drug delivery, automated robotics, digital data storage, etc. The need of materials with high magnetic moment for plethora of industrial applications and the ever increasing demand for efficient data storage in information technology sector have been responsible for many exotic discoveries in material science. Exchange coupling in magnetic hetero-structures is one of those phenomena, which is realised in the read heads of modern data storage devices and could play a crucial role in next generation racetrack memory. The brief overview will present the establishment and control of the interfacial exchange coupling in SrRuO3/PrMnO3 superlattice structure. The interplay of strong AFM coupling energy and Zeeman energy lead to the crossover of negative to positive exchange bias with the increase in cooling field for the field cooled field dependent minor loop. Our results demonstrate that the SRO-PMO could be a model system for the investigations of interfacial exchange coupling.

About the speaker

Antarjami Sahoo is a research scholar from Department of physics. He is working on interfacial exchange coupling in magnetic heterostructures under the guidance of Dr. Prahallad Padhan.