Recent high-magnetic-field studies of unusual groundstates in quasi-two-dimensional crystalline organic metals and superconductors
(2005)
Electron paramagnetic resonance studies of the high-spin molecule Cr10 (OMe) 20 (O2 CCMe3) 10
Applied Physics Letters 86:3 (2005) 1-3
Abstract:
We report millimeter-wave magneto-optical measurements on the high-spin molecule, Cr10 (OMe) 20 (O2 CCMe3) 10. The dependence of the electron paramagnetic resonance as a function of orientation and temperature demonstrates that this compound behaves as a single molecule magnet, and exhibits one of the smallest zero-field splittings (D=-0.045±0.004 K) yet reported for such a system. © 2005 American Institute of Physics.Electron paramagnetic resonance studies of the high-spin molecule Cr10(OMe)20(O2CCMe3)10 -: art. no. 03250
APPLIED PHYSICS LETTERS 86:3 (2005) ARTN 032507
Fermiology of new charge-transfer salts, β″-(BEDT-TTF) 4 [(H3 O)M(C2 O4 )3 ]-solvent where M = Ga, Cr and Fe
Journal De Physique. IV : JP 114 (2004) 205-209
Abstract:
We report high-field magnetotransport measurements on β″-(BEDT- TTF)4[(H3O)M(C2O4) 3]· solvent, where M=Ga3+, Cr3+ and Fe3+ and solvent=C5H5N. In spite of their differing transition metal-ions, M, the three compounds exhibit similar magnetic quantum oscillation spectra superimposed on a positive magnetoresistance. At least four independent quantum oscillation frequencies have been identified, corresponding to two different hole and electron pockets of the Fermi surface which follow the rules of a compensated metal. Observation of the small pockets could be the result of the Fermi surface reconstruction induced by a possible density wave. The effective masses are very similar for different samples and for different pockets range between meff ≈ 0.5-1.1 me whereas the Dingle temperatures varies between TD ≈ 1.4-4 K. At low temperature, the longitudinal magnetoresistance violates Kohler's rule, suggesting that the interlayer transport in these quasi-2D systems cannot be related to a single scattering time and that the disorder plays an important role. © EDP Sciences.The effect of magnetic ions and disorder on superconducting β″-(BEDT-TTF)4 [(H3 O)M(C2 O 4 )3 ]· C6 H5 NO2 salts, where M = Ga and Cr
Journal De Physique. IV : JP 114 (2004) 285-287