Magnetoresistance studies of the ferromagnetic molecular metal (BEDT-TTF)3 [MnCr(C2 O4 )3 ] under pressure
Synthetic Metals 133-134 (2003) 549-551
Abstract:
(BEDT-TTF)3[MnCr(C2O4)3] is the first ferromagnetic molecular metal, in which organic layers of BEDT-TTF alternate with infinite layers of the bimetallic oxalate complex [MnCr(C2O4)3]-. While the bimetallic layer undergoes a magnetic phase transition into a canted ferromagnetic state at 5.5 K, the metallic character of the conductivity is not affected by the magnetic transition [Nature 408 (2000) 447]. We performed magnetoresistance measurements (B≤17 T) at low temperatures (T≥900 mK) and under hydrostatic pressures of up to 2.0 GPa. Oscillations in the magnetoresistance develop under pressure that can be interpreted as Shubnikov-de Haas oscillations, if an internal magnetic field is taken into account. These measurements can thus be interpreted as a measure of the internal magnetic field in the conduction layer caused by the adjacent magnetic oxalate layers. © 2002 Elsevier Science B.V. All rights reserved.Possible Frohlich superconductivity in strong magnetic fields
SYNTHETIC MET 133 (2003) 99-102
Abstract:
A brief review of some of the arguments pointing towards the possibility of organic conductors of the form alpha-(BEDT-TTF)(2)MHg(SCN)(4) (where M = K, Tl and Rb) being candidates for Frohlich superconductivity is given. (C) 2002 Published by Elsevier Science B.V.Studies of the magnetoresistive peak due to interlayer coherence in a quasi-two-dimensional superconductor
SYNTHETIC MET 133 (2003) 173-175
Abstract:
Peaks in the interlayer magnetoresistance of the layered superconductor kappa-(BEDT-TTF)(2)Cu(NCS)(2) are observed in the presence of an exactly in-plane magnetic field. The existence of these resistance peaks implies the presence of a three-dimensional Fermi surface extending in the interlayer region. Analysis of the width of the peaks yields a value for the interlayer transfer integral. (C) 2002 Elsevier Science B.V. All rights reserved.High-magnetic-field tests for reduced dimensionality in organic superconductors: Just how valid are the Mott-Ioffe-Regel and Anderson criteria?
INT J MOD PHYS B 16:20-22 (2002) 3078-3083
Abstract:
The interlayer transfer integrals of various organic superconductors have been deduced using high-magnetic-field techniques. The measurements demonstrate the inappropriateness of criteria used to denote incoherent interlayer transport.Superconductivity, incoherence and Anderson localization in the crystalline organic conductor (BEDT-TTF)3 Cl2 ·2H2 O at high pressures
Journal of Physics Condensed Matter 14:31 (2002) 7345-7361