Berlin 2008 – scientific programme
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MA: Fachverband Magnetismus
MA 20: Multiferroics
MA 20.11: Talk
Wednesday, February 27, 2008, 16:45–17:00, EB 202
Magnetic field dependent structural modulations in RFe3(BO3)4 — •Martin Philipp1, Olga Kataeva1,2, Christian Hess1, Jorge E. Hamann-Borrero1, Rüdiger Klingeler1, Natalia Tristan1, Bernd Büchner1, Martin von Zimmermann3, Alexander Vasiliev4, Elena Popova4, and Leonard N. Bezmaternykh5 — 1Leibniz-Institute for Solid State and Materials Research, IFW-Dresden, 01171 Dresden, Germany — 2A.E.Arbuzov Institute, Russian Academy of Sciences, Arbuzov Str. 8, 420088 Kazan, Russia — 3HASYLAB@DESY, Notkestr. 85, 22603 Hamburg, Germany — 4Physics Faculty, Moscow State University, 119992 Moscow, Russia — 5L.V.Kirensky Institute of Physics, Siberian Branch of RAS, 660036 Krasnoyarsk, Russia
Recently, rare earth iron borates RFe3(BO3)4 (R: Rare Earth) attracted attention as candidates for possible multiferroic behavior. Most of the RFe3(BO3)4 crystals exhibit antiferromagnetic order below ∼ 40 K. In this ordered phase several magnetic transitions are taking place, in dependence of temperature and magnetic field.
We have studied these magnetic transition by means of hard x-ray diffraction (hν= 100 keV) for the compounds TbFe3(BO3)4, GdFe3(BO3)4 and YFe3(BO3)4. Several superlattice reflections could be observed, which indicate commensurate stuctural modulations along a- and c-axis. We compare the field and temperature dependence of these superlattice reflections with results from thermodynamics and transport measurements.