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Lecture Graeme R. Blake

Rooster

WanneerWaar
16 december 2010 FWN-Building 5113.0201, Nijenborgh 4, 9747 AG, Groningen
Speaker: Dr. Graeme R. Blake
Affiliation: SSME, University of Groningen
Title: Orbital ordering and magnetic ordering in transition metal and alkali metal oxides
Date: Thu Dec 16, 2010
Start: 14.00
Location: FWN-Building 5113.0201
Host: P.H.M. van Loosdrecht
Telephone: +31 50 363 8149

Abstract

Complex interplay between spin, orbital and lattice degrees of freedom lies at the heart of a wide range of physical properties exhibited by crystalline materials with strongly correlated electrons. These phenomena have been widely studied in transition metal oxides, and will be illustrated by discussing the close competition between different spin and orbital ground states in the rare-earth vanadate perovskites (RVO3). The essential role played by X-ray and neutron scattering in probing these materials will be emphasised. More recently, the study of orbital and magnetic ordering has been extended to compounds that possess unpaired p-electrons such as the alkali metal oxides (AO2-x), which contain magnetic dioxygen anions. It will be shown that many analogies with magnetic transition metal oxides can be drawn. Furthermore, the additional degree of complexity provided by the non-spherical nature of the magnetic anions in AO2-x will be discussed.

Laatst gewijzigd:22 oktober 2012 14:30