Research and development in Magnetism and magnetic materials and Computational electromagnetics . I have been actively involved in guiding Ph.D students, M.Tech students and B.Tech students in Materials science/ Physics, Electrical engineering in the area of ceramic materials-synthesis and characterization and microwave devices including maetmateroals. I have also successfully worked on several sponsored and consultancy projects as one of the investigators and successfully completed these projects. In the course of these investigations I have tackled several problems faced in the development of ceramic based materials and their characterization

     Developed low loss garnets and ferrites for circulator applications comparable to imported materials developed (About 200 pcs were supplied to SAMEER, Bombay) by controlling the processing conditions Independent control of grain growth and densification of ferrites using hot pressing in a setup designed and fabricated inhouse. This was used to develop hot pressed Mn-Zn ferrites (permeabilities > 4500) as well as garnets with controlled grain size. The permeability spectra of garnets was studied and relaxation studies reported. Microwave absorbing paints based on ferrites developed and characterized. A project on computer aided design of these materials was undertaken and materials with absorption of about 10db for 1 mm thick paints in the X band was achieved. Good quality thin films of high Tc superconductors suitable for microwave planar circuits have been deposited on alumina and MgO. High Q microwave cavity with Q ? 30,000 in Ku band has been obtained A low cost vibrating sample magnetometer was designed and fabricated under a project from DST. The technology has been transferred to a vendor in Mumbai. The cost of the instrument is a fraction of the cost of an imported instrument. Several projects on thin films of ferrites and oxide materials with nano-crystalline structure were prepared by sputtering. These materials have properties much different from the bulk. Some studies to understand this difference has been carried out, using partial phase of superparamagnetic grains in presence of ferromagnetic grains. Numerical methods in electromagnetic field problems: Some work on finite element method, boundary element method and finite difference time domain method has been done for problems in microwave magnetics like RCS, scattering and measurement of permeability at microwave frequencies. I have completed a project for simulation of RCS of a complex target at 10 GHz for a DRDO lab and successfully developed the code in collaboration with M/s Zeus Numerix a company incubated through SINE, IIT Bombay. This required a large number of cells (~ 1 billion) and parallel computation with resources of CDAC I have undertaken a project for other DRDO labs in similar areas