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© Centre for Modeling & Simulation, Savitribai Phule Pune University
| Savitribai Phule Pune University |
| Title | Multicomponent Heusler alloys for spintronic applications |
| Speaker |
Biplab Sanyal,
Head, Materials Theory Division, Department of Physics and Astronomy, Uppsala University, Sweden.
Prof. "Biplab Sanyal" is an Associte Professor and Division Head of Materials Theory Division at Department of Physics and Astronomy, Uppsala University, Sweden. His main reserch interests are modeling and simulations of Graphene & 2D materials, multiferroics, random alloys, organometallics, clusters etc. He has supervised several PhD students and has publised more than 200 articles in internationally reputed journals. He is on Advisory board & Editor of de Gruyter and Editorial board for ScienceJet journal. Along with his illustraitious teaching and research career he also has ventured into movies and has a page on IMDb (https://www.imdb.com/name/nm7428689/) |
| Date & Time | Tuesday, 30 July 2019 | 15:00-16:00 |
| Venue | Seminar hall, CMS, SPPU. |
| Abstract | For spintronic applications, new magnetic materials with high Curie temperatures are perpetually sought for. Here, we present first principles calculations of structural, electronic and magnetic properties of quaternary Heusler compounds CoX′Y′Si where X′ is a transition metal with 4𝑑 electrons and Y′ is either Fe or Mn. Our study finds five new half-metallic ferromagnets with spin polarisation nearly 100% with very high Curie temperatures. The variation of Curie temperatures as a function of valence electrons can be understood from the calculated inter-atomic exchange interaction parameters. A few other compounds have been identified, which could be potential half-metals with suitable application of pressure or with controlled doping. Our analysis shows that the half-metallicity in these compounds is intricately related to the arrangements of the magnetic atoms in the Heusler lattice and hence, the interatomic exchange interactions between the moments. |
| Organizer/Host | Bhalchandra Pujari |
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