Dresden 2014 – wissenschaftliches Programm

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KR: Fachgruppe Kristallographie

KR 4: Multiferroics I (MA jointly with DF, DS, KR, TT)

KR 4.9: Vortrag

Dienstag, 1. April 2014, 11:45–12:00, BEY 118

Time-resolved analysis of switching in spiral multiferroics — •Jonas Stein¹, Tobias Cronert¹, Jeannis Leist², Karin Schmalzl³, A Agung Nugroho⁴, Alexander C Komarek⁵, Götz Eckold², and Markus Braden¹ — ¹II. Physikalisches Institut, Universität zu Köln — ²Institut für Physikalische Chemie, Universität Göttingen — ³JCNS at ILL, France — ⁴Institut Teknologi Bandung, Indonesia — ⁵MPI für chemische Physik fester Stoffe

Multiferroic crystals are promising materials for future memory devices with extremely low power consumption. The rise time between two states is a crucial parameter for a possible application and was investigated in the spiral spin multiferroic TbMnO₃. Polarized neutron diffraction is able to determine the ratio of chiral domains, which can be controlled by an external electric field. Using the stroboscopic technique we can follow the reversion of chiral domains in the timescale of a few 100 microseconds to hours. In TbMnO₃ we find a clear logarithmic relation between the rise time and temperature that is fulfilled over 5 decades.