The nucleation and growth mechanism of the electrodeposition of Tl₂Ba₂Ca₂Cu₃O₁₀superconducting thin films on Al-substrate

Abstract

The present study demonstrates the nucleation and growth mechanism of the Tl 2 Ba 2 Ca 2 Cu 3 O 10 (Tl-2223) superconductor by the electrodeposition technique on low cost aluminum coated glass (ALCG)-substrate at low processing temperature and short synthesis time, which is one of the most important aspects demanded of superconducting materials in practical applications. Superconducting thin films of Tl-2223 have been fabricated by the electrodeposition process on crystalline ALCG-substrate for the first time. The electrodeposition potential was optimized by studying the electrochemical behavior of the precursors by cyclic voltammetry (CV). All the precursor components, including Tl, were deposited at an optimized potential of −3 V with respect to a saturated calomel electrode (SCE) for 5 min followed by the heat treatment at 700 • C for 2 h in flowing oxygen atmosphere. X-ray diffraction (XRD) studies confirmed the presence of the Tl-2223 phase with marked preferential orientation along the c-axis. Atomic force microscopy (AFM) images show uniform and compact morphology with growth of rod-like grains (50-100 nm width) of Tl-2223 along the plane parallel to the ALCG-substrate. The transport measurement for Tl-2223 film showed a superconducting transition temperature T c of 125 K and a critical current J c of 0.31 × 10 6 A cm −2 at 77 K.

Growth mechanism of amorphous carbon by liquid plasma electrolytic deposition

“…Moreover, the surface morphology of amorphous carbon films demonstrates the island groove characteristic of the non‐reactive nucleation, characterized by field emission SEM images in Fig. . As the complex reaction happens at the liquid/solid interface, which is hard to observe through the experimental techniques, although XPS and FTIR analysis support the formation of some Si–O–C and Si–C bonds at the interface, amorphous carbon films still remain weakly adhesive.…”

Production of Y-Ba-Cu-O Nanowires and Nanotubes by Electrochemical Method

“…It has been shown that depending on the rate of nucleation, the growth mechanisms are of two types, instantaneous nucleation and progressive nucleation [7]. In order to study the electrochemical nucleation and growth mechanisms of YBaCuO electrodeposition onto AAO, the currenttime transients are further analyzed by plotting the (I/I max ) 2 versus (t/t max ) for the instantaneous and progressive growth.…”

“…In order to study the electrochemical nucleation and growth mechanisms of YBaCuO electrodeposition onto AAO, the currenttime transients are further analyzed by plotting the (I/I max ) 2 versus (t/t max ) for the instantaneous and progressive growth. A theoretical plot for the Scharifker and Hills model [7] and the experimental plots of YBaCuO alloy deposition are shown in Fig. 1b.…”

The Growth of (00l)-Oriented CeO₂ Buffer Layers on R-Cut Sapphire Substrates for the Epitaxy of Tl-2212 Superconducting Films

“…High temperature superconducting (HTS) thin film is a kind of important material used in superconducting electronics applications, including high-frequency electronic devices and Josephson junction devices [1]. In the practical HTS thin films, Tl 2 Ba 2 CaCu 2 O 8 (Tl-2212) films are getting more and more attention on passive microwave devices due to their high critical temperature [2][3][4], high critical current density, low microwave surface resistance and strong anti-humidity [5][6][7][8].…”