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Lecture Jeroen van den Brink


21 April 2008 FWN-Building 5113.0201, Nijenborgh 4, 9747 AG, Groningen
Speaker: Prof. Dr. Jeroen van den Brink
Affiliation: Institute Lorentz for Theoretical Physics, Leiden University
Title: Multiferroicity in manganites
Date: Tue Apr 22, 2008
Start: 11.00
Location: FWN-Building 5113.0201
Host: Maxim Mostovoy
Telephone: +31 50 363 3419


A number of generic mechanisms can induce ferroelectric ordering in magnetic charge ordered materials. I will discuss multiferroicity driven by different forms of charge and orbital ordering, with a focus on manganites. Multiferroic manganites include (i) the perovskites of the type (PrCa)MnO3, and (ii) the complex and interesting situation in manganites of the type RMn2O5, where R is a rare earth element. In the former combined charge and orbital ordering leads to ferroelectricity, in the latter the ferroelectricity is completely induced by magnetism, but with charge ordering playing important role. We show that in these materials electronic correlations decimate the intrinsic ferroelectric polarization.

Last modified:22 October 2012 2.30 p.m.