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PGI-1 Seminar: Dr. Karthik V. Raman

Transformative ferromagnets: molecules as surface modifiers

16 Jul 2015 10:30
PGI Lecture Hall

TIFR, Hyderabad, India


The use of nanometer-sized π-conjugated aromatic molecules as surface modifiers on transition metal (TM) surfaces is gaining a widespread attention for potential spintronic applications. The creation of new interface states formed by the hybridization of molecular orbitals with the d-bands of the surface, with unique electronic and magnetic character, is offering a rich interface spin-chemistry that opens a molecular-genome initiative to develop spin-functional tailor-made devices. This talk will provide an overview of the development of this field starting with one of the first works confirming the strong influence of molecular morphology on the value of interface spin polarization to the recent study of interface spin responses using planar phenalenyl-derived molecules. Importantly, a new form of magnetoresistance effect which arises purely due to a response from the hybrid interface states is demonstrated. We show a proof-of-concept to build next generation molecular scale memory devices. These reports have opened many new avenues to explore the possibility to engineer the interface magnetic exchange coupling and magnetic anisotropy. Further, exploring such interactions in non-magnetic TM surfaces may also provide avenues to build new classes of magnetic systems. At the end, some of the future directions of research in this field will be discussed.


Prof. Dr. Stefan Blügel
Phone: +49 2461 61-4249
Fax: +49 2461 61-2850