Dresden 2014 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 79: Correlated Electrons - Poster Session
TT 79.35: Poster
Mittwoch, 2. April 2014, 15:00–19:00, P2
ESR studies of CoCr2O4 — •Alexey Ponomaryov1, Mykhaylo Ozerov1, Joachim Woznitza1, Vladimir Tsurkan2, 3, Alois Loidl2, and Sergei Zvyagin1 — 1High Magnetic Field Laboratory (HLD), Helmholtz-Zentrum Dresden-Rossendorf, Germany — 2Experimental Physics V, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, Germany — 3Institute of Applied Physics, Academy of Science of Moldova, Chisinau, Republic of Moldova
CoCr2O4 is a ferrimagnet (TC∼ 97K) with cubic spinel structure and two magnetic ions (Co2+ and Cr3+) in the elementary cell. Significant spin-lattice coupling and magnetic frustration are important features of CoCr2O4, defining its very unusual phase diagram [1]. Here, we report on high-field electron spin resonance (ESR) studies of single-crystalline samples of CoCr2O4 performed in the frequency range from 90 to 1000 GHz in magnetic fields up to 16 T. Two modes were observed. Peculiarities of the ESR excitation spectra are discussed.
This work was partly supported by the DFG.
Tsurkan et al., Phys. Rev. Lett. 110, 115502 (2013)