Effect of Mo substitution on the structural and transport properties of Bi2Sr2Ca2Cu3−xMoxO10+y system

Comparison of the high temperature thermoelectric properties for Ag-doped and Ag-added Ca3Co4O9

“…Such variation of the unit-cell parameters can be explained by two main points. First, comparing the ionic radius of Ag + and Ca 2+ (1.15 Å and 1.00 Å, respectively, in six-coordination), as well as the valence state which are different, it is inevitable that a distorted bond structure and thus a change on the unit-cell parameters [20]. Second, it is also important to consider the charge distribution of the Ca 3 Co 4 O 9 system.…”

The single crystal superconducting Bi-2212 whiskers fabrication and their thermal transport properties

“…Thermoelectric power (TEP), S, gives very important information about the nature of the carriers responsible for conduction process, the scattering mechanism and also the band structure of the material. Since the discovery of the HT c superconductors, many experimental and theoretical studies have been made to evaluate the thermoelectric power data of these cuprates [21][22][23][24][25]. In these studies, it was seen that the variation of thermoelectric power with temperature and hole concentration, p, exhibits common behavior; for the underdoped systems (low carrier concentration) thermoelectric power has positive sign and large.…”

Improvement in high-Tc phase formation in (thallium–antimony) doped bismuth-based superconducting materials

“…It can be regarded as a model system for investigation of the appearance of the superconducting state by doping with different elements. A lot of interest is focused on the Bi(2223) phase and substitution of several cations, such as Pb +2 , Sb +3 , Mg +2 , Nb +3 , Ga +3 , Mo +3 Au +3 and V +5 , Pb +2 Sb +3 , Pb +2 Sn +4 and Nd +3 Tb +3 at different sites has already been investigated [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

“…Increasing annealing time from 10 to 50 h (at 1103 K) of Au-doped Bi(2223) system results in increase in the values of the critical transition temperature, Tc (0) (from 100 to 106 K) and the transport critical current density [6,7]. On the contrary, the addition of Nb, Ga and Mo results in lowering the zero resistivity critical temperature, Tc (0) of the material [8][9][10]. Substitution Mg in place of Ca decreases the critical current density [11].…”