Superconductivity in the Ag-substituted La_1.8Sr_0.2CuO₄oxide system

Investigation of the thermoelectric properties of La2CuO4 ceramics with the addition of Ag

“…Although Ag þ (r Ag þ ¼ 1.15 Å) and Cu 2 þ (r Cu 2 þ þ ¼0.73 Å) have largely different ionic radii when both coordination numbers are 6, Malik et al have reported that Cu 2 þ can be substituted by Ag þ in La 1.8 Sr 0.2 CuO 4 . Hence Ag þ substitution for Cu 2 þ may also be possible in our case [27]. As shown in Fig.…”

“…In order to investigate the TE properties of La 2 Ag x CuO 4 at room temperature and lower temperatures and also to verify whether or not Cu-based oxides are suitable for TE applications, various [26][27][28][29][30] amounts of Ag were added to La 2 CuO 4 polycrystalline ceramics, and their TE properties were investigated from 380 K down to 10 K.…”

Structural studies of Nd1.85Ce0.15CuO4 + Ag superconducting system

“…The effect of silver addition on ceramic superconductors is a topic of current interest [1][2][3][4][5]. This is because the fabrication of cuprate superconductor wires and tapes is usually carried out using silver as cladding.…”

“…This is because the fabrication of cuprate superconductor wires and tapes is usually carried out using silver as cladding. Generally, silver is considered a nonreactive element, however, sometimes it can also substitute for copper which is quite unusual and interesting [1,2]. Apart from the possibility of a small amount of silver (Ag) dissolving in the lattice, the increased concentration of Ag (5-15 wt%) can regulate the dynamics of the sintering/re-crystallization process and as a result determine the physical nature of the inter-and intra-grain fluxon drift motion, thereby affecting the superconducting critical current density.…”