DPG Phi
Verhandlungen
Verhandlungen
DPG

Dresden 2009 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

TT: Fachverband Tiefe Temperaturen

TT 7: Postersession Matter at Low Temperature: Materials

TT 7.5: Poster

Monday, March 23, 2009, 13:00–16:45, P1B

Antiferromagnetic resonance in multiferroic YMnO3 and LuMnO3 — •D. Kamensky, M. Ozerov, E. Čižmár, J. Wosnitza, and S. Zvyagin — Dresden High Magnetic Field Laboratory (HLD), Forschungszentrum Dresden - Rossendorf, 01314 Dresden, Germany

Multiferroic rare-earth manganites have attracted much attention because of the coexistence of ferroelectric and magnetic order. Combining conventional far-infrared Fourier-transform and THz-range free electron laser electron spin resonance (ESR) techniques, magnetic excitations in the hexagonal multiferroic materials YMnO3 and LuMnO3 have been studied. In the antiferromagnetically (AFM) ordered phase the gap in the excitation spectrum (∼ 42 and ∼ 48 cm−1 for YMnO3 and LuMnO3, respectively) was observed directly. Similar slope of the frequency-field dependences of the AFM resonance modes, ∼ 0.5 cm−1/T, was found for both compounds. A fine structure of the AFM resonance absorption has been revealed by means of high-resolution ESR techniques, which can be explained taking into account a finite interaction between the neighboring Mn3+ layers.

The work was done in collaboration with A.K. Kolezhuk, D. Smirnov, H.D. Zhou, and C.R. Wiebe.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2009 > Dresden