Perovskite Based Metal-Oxides and Nanocomposite Thin Films

14th September 2022

Timing : 1 pm EST

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Multiferroics (MFs) are materials that exhibit two or more primary ferroic states (ferroelasticity, ferroelectricity, ferromagnetism and ferrotoroidicity) in one material. A subset of these multiferroic materials is magnetoelectric MFs that display some magnetic and electric orders and are of great interest for memory, energy harvesting, and sensing applications. ME MFs can be broadly divided into two categories: (i) single-phase and (ii) biphasic. Single-phase MFs can be type I, with separate ordering temperatures of the two phases or type II, with similar transition temperatures. Type II MEs are of great interest due to strong ME coupling between the two order parameters, which enables the control of magnetic order by electric fields and vice versa that facilitate many devices. In biphasic ME films, ferroelectric (piezoelectric) materials are combined with magnetostrictive materials and an indirect large ME coupling can be achieved via strain close to room temperature. The concentration, ratio, or distribution (connectivity) of the two phases play an important role in defining their physical properties. In my group, various functional metal-oxide materials and nanocomposite films are synthesized using cost-effective solution technique and studied. In my talk, I will present our group’s work on single-phase and biphasic ME materials to understand the transition temperatures and ME coupling behavior. The single-phase ME materials are also examined for the magnetocaloric behavior, which show potential for magnetic refrigeration.



Snow
Dr. Menka Jain
Associate Professor, Institute of Materials Science and Department of Physics,
University of Connecticut, Storrs, CT, USA

Professor Menka Jain is known for her work in the field of ferroelectrics and multiferroics. Professor Jain obtained BS degree in 1996 and MS degree in physics in 1998 in India. For more than a year, she was a Research Assistant in IIT Kanpur, department of Physics. In 2004, she obtained PhD degree from the University of Puerto Rico (USA). She was Director’s funded postdoctoral fellow from 2005-2008. In 2008, she joined University of Connecticut as an Assistant Professor and was promoted to Associate Professor with tenure in 2014. She has organized several symposiums internal conferences, such as Materials Research Society, American Ceramic society as well as several workshops. This year, she is part of the organization committee for the International Workshop on Oxide Electronics (October) and Quantum Matter: Dynamics and Sensors (December).