Regensburg 2016 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 17: Poster Session I
MA 17.76: Poster
Dienstag, 8. März 2016, 09:30–12:30, Poster B1
ESR studies of the S=1/2 Heisenberg chain compound Cu(py)2Cl2 — •A.N. Ponomaryov1, J. Wosnitza1, K.Yu. Povarov2, M. Thede2, A. Zheludev2, E. Ressouche3, and S.A. Zvyagin1 — 1High Magnetic Field Laboratory (HLD), Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany — 2Neutron Scattering and Magnetism, Laboratory for Solid State Physics, ETH Zürich, Switzerland — 3INAC SPSMS, CEA and Université Joseph Fourier, F-38000 Grenoble, France
Cu(NC2H5)2Cl2, a S = 1/2 Heisenberg chain compound with exchange interaction J = 13.4 K, was studied by means of electron paramagnetic resonance spectroscopy. A single resonance line was observed in the temperature range from 2 to 300 K. The angular dependence of the resonance absorption indicates the presence of two magnetic centers, which is in agreement with the crystallographic structure. The temperature dependence of the resonance linewidth line was analyzed by use of the Oshikawa and Affleck theory (Phys. Rev. B, 65, 134410). The corresponding spin-Hamiltonian parameters were extracted and analyzed.
This work was partly supported by the DFG.