Author/Authors :
Blundell، نويسنده , , S.J. and House، نويسنده , , A.A. and Singleton، نويسنده , , J. and Kurmoo، نويسنده , , M. and Pratt، نويسنده , , F.L. and Pattenden، نويسنده , , P.A. and Hayes، نويسنده , , W. and Graham، نويسنده , , A.W. and Day، نويسنده , , P. and Perenboom، نويسنده , , J.A.A.J.، نويسنده ,
Abstract :
The Fermi surface topology and electronic bandwidth of the first ever organic superconductor containing magnetic ions, the charge transfer salt β"-(BEDT-TTF)4[(H2O)Fe(C2O4)3].C6H5CN, have been studied using angle-dependent magnetoresistance oscillation (AMRO) and infrared (IR) reflectivity measurements. This material has a superconducting transition temperature of 7 K. AMRO data have been recorded at 1.4 K in a field of 15 T for all possible orientations of the sample with respect to the applied field. Several features with very strong azimuthal dependence are observed. The IR reflectivity is also very anisotropic; the reflectivity for E parallel to the needle axis is eight times greater than for the perpendicular direction. The results are discussed in relation to the calculated band structure and Fermi surface.
Keywords :
Fermi surface studies , ET salts , Superconductivity , magnetism , magnetoresistance
