J. Phys. IV France
Volume 114, April 2004
Page(s) 291 - 292

J. Phys. IV France
114 (2004) 291
DOI: 10.1051/jp4:2004114062

Anisotropic susceptibility of $\alpha$-(BEDT-TTF) 2KHg(SCN) 4

W. Biberacher1, P. Christ2, M.V. Kartsovnik1, D. Andres1, H. Müller3 and N. Kushch4

1  Walther-Meissner-Institut, Walther-Meissner-Str. 8, 85748 Garching, Germany
2  Max-Planck-Institut für Physik, 80805 München, Germany
3  European Synchrotron Radiation Facility, 38043 Grenoble, France
4  Institute of Problems of Chemical Physics, 142432 Chernogolovka, Russia

We report detailed studies of the anisotropy of the magnetic susceptibility $\chi $ by cantilever torque measurements in the temperature range from 1.3 K to 15 K and in magnetic fields up to 15 T. There is a considerable anisotropy of $\chi $ in the normal state above 10 K. The orientation of the susceptibilty tensor is slightly different from the crystalline a, b* and c axes. These results can be qualitatively explained by the orientation of the BEDT-TTF molecules in the crystal structure. In the low temperature phase an additional anisotropy develops, where the orientation is fixed to the normal of the two-dimensional layers. Key words. Organic metals - susceptibility - magnetic torque.

© EDP Sciences 2004