Negative Magnetoresistance in (TMTTF)2Br

Low Temperature Thermodynamical Properties of the Organic Chain Conductor (TMTTF)2Br

We report on the first thermodynamical investigation of (TMTTF)2Br in its antiferromagnetic ground state. There is a discontinuity in the lattice specific heat, Cp/T~,

1H-NMR relaxation measurements in the organic conductors : (TMTTF)2Br and (TMTTF)2PF6

Pressure-temperature phase diagrams of several (TMTTF)2X compounds : stabilisation of a highly conducting metallic state under pressure in (TMTTF)2Br

2014 Needle axis resistivity measurements on several TMTTF (tetramethyltetrathiafulvalene) salts of the form (TMTTF)2X, with X = Br, ClO4, PF6, are presented for pressures up to 32 kbar. The pressure-temperature phase diagrams of all three materials are similar with the stabilization under pressure of a metallic state to low temperatures (~ 20 K), below which there is a well defined metal-insul...

مطالعه اثر جانشانی کبالت بر ساختار بلوری و مغناطومقاومت ترکیبات تهیهشده به روش سل- ژل ،La0/57Sr0/2Mn1-xCoxO3

The La0.75Sr0.2Mn1-xCoxO3 (0 ≤ X ≤ 1) Manganite-Cobaltites are synthesized by sol-gel method and their structural, electrical and magnetic properties are studied. After calcination over 800 ºC, all compounds were crystallized in the perovskite rhombohedral structure ( R3C, Space group). Due to nonstochiometery, some traces of the La2O3 phase were appeared in final samples. Resistivity meas...

Substitution of TMTSeF with TMTTF in (TMTSeF)2ClO4 : high pressure studies

2014 [(TMTSeF)1-x(TMTTF)x]2ClO4 alloys have been studied under pressure for pressures up to 18 kbar through resistivity measurements. On substitution of TMTSeF in the superconducting compound (TMTSeF)2ClO4 with TMTTF a low temperature metal-insulator (M-I) transition is found at ambient pressure; above some critical pressure, Pc, the M-I transition is suppressed giving rise to a metallic state ...