ESR study of the (super)conducting charge-transfer salts β^''-(ET)4-[(H3-O)M-(C2-O4)3]S (original) (raw)

Abstract

We present a spin resonance investigation of the family of quasi- two-dimensional organic (super)conductors ''circ; -(ET)4-[(H3-O)M-(C2-O4)3]S (M = Cr^ 3+, Fe^3+; S is a guest molecule). The spin systems are probed by means of both resonant cavity perturbation and field modulation techniques in the frequency range 50-313 GHz. The role of the different solvent molecules in determining the degree of spin-orbit coupling and the local symmetry at the metal ion site is established. Intensities, positions and widths of the resonant lines reveal significant modifications of the spin-orbit coupling, and of the inter- and intra-ionic spin-spin interactions below T=10K. Despite the onset of a weak antiferromagnetic internal field at low temperature, the ultimate narrowing of the lines suggests spin-lattice interactions are still the dominant relaxation process. Additional lineshifts observed below B = 2.5 T and T = 4 K, attributed to the presence of diamagnetic currents in the mixed s...

Scott Turner hasn't uploaded this paper.

Let Scott know you want this paper to be uploaded.

Ask for this paper to be uploaded.