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Regensburg 2016 – scientific programme

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MA: Fachverband Magnetismus

MA 17: Poster Session I

MA 17.76: Poster

Tuesday, March 8, 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. Zvyagin11High 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.

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