My Research

                                                                             Multiferroic, Magnetoelectric and Biferroic materials

   Multiferroic and Biferroic materials that exhibit both ferroelectric and ferromagnetic properties simultaneously are of time-honored subject of research owing to their intriguing fundamental interest as well as their promising applications in magneto electric devices such as magnetic sensors, multistate non-volatile memory devices, and other spintronic devices. Fundamentally, origin of the unexpected simultaneous appearance of both ferroic orders and the intricate coupling are still under debate and challenge the knowledge of human beings. Hence, before stepping towards their technological applications, the search and identification of suitable candidates and the understanding of the origin of Multiferriocity in them is extensively essential.
   In this era of scientific research our intension is put our efforts into the study and understanding of various properties of Multiferroic materials meticulously. We prepare various single-phase Multiferroic and Biferrioc materials with different particle size by implementing different preparation techniques. Our sample characterization comprises of various physical techniques such as X-ray diffractrometry, Scanning electron microscopy, SQUID mangnetometry, Calorimetry, dielectrimetry, etc. Our recent investigations showed that spin reorientation and spin flip transitions are not only leads to coupling of magnetic and dielectric orders but also to emergence of exchange bias and its sign change in Chromium based spinel compound.

                                                         Interplay between magnetism, superconductivity and charge density waves

Our Research group focuses on novel rare-earth based Intermetallic ternary alloys in a low temperature regime which shows one of the most diverse magnetic and electrical phenomena. As we lower the temperature, the elastic vibration of the atoms are more and more suppressed which gives a chance for timid interactions to pop up and exhibit beautiful phenomena like – Superconductivity, Charge density wave and other magnetic interactions like ferromagnetism, anti-ferromagnetism etc. Even the interplay among these two were already observed in one of our single crystals! The structural transformation observed in a 3D CDW compound is quite phenomenal and necessity of efficient handling of the crystal during transition regime makes experimental investigation quite challenging as well. We also look how new physics is brought about by doping the compound to observe the change in density of states, transition temperatures etc. We synthesize as well as characterize crystals using various experimental techniques and devices in a collaboration with Tata Institute of Fundamental Research, Mumbai.

                                                                               Vortex dynamics in Type-II superconductors

A principal property of superconductors is that they expel magnetic fields; this is called the Meissner effect. If the magnetic field becomes sufficiently strong, one scenario is for the superconductive state to be "quenched". However, in some cases, it may be energetically favorable for the superconductor to form a lattice of quantum vortices, which carry quantized magnetic flux through the superconductor. A superconductor that capable of having vortex lattices is called a type-II superconductor. The various factors like intervortex interaction, pins present in the sample, temperature effects etc. are making the underlying physics more joyable in the study of vortices in type-II superconductors. Our research in superconductivity mainly focused on understanding the dynamics of vortices in Type-II superconductors with the aid of experiment and simulation.