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OnderzoekZernike (ZIAM)NewsSeminars

Lecture Dimitri N. Argyriou

Rooster

WanneerWaar
18 januari 2007 FWN-Building 5113.0202, Nijenborgh 4, 9747 AG, Groningen
Speaker:Dr. Dimitri N. Argyriou
Affiliation:Hahn-Meitner-Insitut, Berlin, Germany
Title:Unraveling spirals: complex magnetism in multiferroic perovskite manganites
Date:Thu Jan 18, 2007
Start:11.30
Location:FWN-Building 5113.0202
Host:M. Mostovoy
Telephone:+31 50 363 3419

Abstract

Although in conventional ferroelectrics the requirements of magnetism and ferroelectricity are chemically incompatible, recent investigations of spin frustrated maganites perovskites RMnO3 have shown that this chemical incompatibility can be overcomed by frustration. In this talk I will describe the changes in magnetic structure that are associated by field induced changes in the direction of the polarization for R=Tb and Dy. In broad terms these transitions can well understood in terms of phenomenological theory as well as from the magnetic excitations of a spiral magnetic ordering observed in the ferroelectric phase. In collaboration with N. Aliouane, S. Landsgessel, O. Prokhenko, E. Dudzik, Ralf Feyerherm. J. Strempfer and I. Zekinoglou, D. Senff and M.
Laatst gewijzigd:22 oktober 2012 14:30