57Fe Mössbauer probe of magnetic-electronic states under extreme conditions
LQMEC Synergy com Prof. Giovanni Hearne (Dept. Physics, University of Johannesburg)
20/03, 4ª feira, 15h. Ed. Principal, Auditório César Lattes ou via Zoom: sala 824 1511 3194, senha 011616
57 Fe Mössbauer spectroscopy (MS) is by now a well known local probe of the magnetic-electronic state of iron-based phases. It provides information on Fe valence, valence dynamics like charge transfer, local coordination changes, spin states and magnetic states. A more challenging, and therefore less common, application of the technique is 57 Fe MS under extreme conditions of high pressure. The above mentioned electronic states can then be probed in-situ as a function of pressure as a “tuning” parameter. I will briefly discuss the methodology of 57 Fe MS implemented under high pressure in the diamond anvil cell. Then I will exemplify its relevance in condensed matter physics, chemistry and geophysics contexts, by reviewing some of the studies mentioned in the references below.
► Mais informações em lqmec.com/lqmec-synergy
