Temperature dependence of composition ratio of Bi2Sr2CaCu2O8+δ film by PLD method

The effects of the post-annealing temperature on the growth mechanism of Bi2Sr2Ca1Cu2O8+ thin films produced on MgO (1 0 0) single crystal substrates by pulsed laser deposition (PLD)

“…It has been recently reported, for example, that high T C and J C values may be obtained for these high-T C materials produced by continuous laser irradiation methods [40][41][42]. On the other hand, it was reported that a significant improvement in supercon ducting propertie s of the thin films could be obtained, deposited by PLD and applying a post-anneal ing heat treatment in an atmosph ere containing a mixture of argon and oxygen (Ar: 93, O 2 : 7) [9,13,15,17]. Among various factors, the quality of the substrate also affects directly the supercon ducting properties of the thin films.…”

Stoichiometric transfer of material in the infrared pulsed laser deposition of yttrium doped Bi-2212 films

“…The literatures abound with reports of pulsed laser deposition (PLD) of Bi-Sr-Ca-Cu-O (BSCCO) films using UV excimer or Nd:YAG lasers [11][12][13][14][15][16][17][18]. This technique allows for the deposition of smooth nanometer-scale thin films with electrical properties suitable for many applications [11][12][13][14][15][16].…”

“…These conditions can lead to cationic composition variation and most importantly, oxygen composition variation in the deposited films [14,15]. In some studies with KrF (k = 248 nm) excimer laser deposition of Bi-2212, the deposited films showed Ca, Cu and Sr content variation [14,16,17]. Films deposited in Ar or O 2 atmosphere also showed a decrease in Sr, Ca and Cu content resulting in large amounts of Bi [10,14].…”

“…Deposition in relatively high energy fluence and post-annealing at high substrate temperatures leads to Bi-deficiency for some UV PLD grown films [14,[16][17][18]. The films composition is usually different from the PLD target composition [14][15][16][17][18].…”

Post Deposition Heat Treatment Effects on Ceramic Superconducting Films Produced by Infrared Nd:YAG Pulsed Laser Deposition

“…This process is either performed in-situ or ex-situ and part of the post heat treatment [4,18]. These results implies that post heat treatment is necessary to homogenize the composition of the film and improve the critical temperarure T c [1,4,19] only about 58 K and for Bi-22Y2, the highest T c is 90.5 K at 25% Y concentration [9,10]. Y substituted Bi-2212 films grown by IR PLD show drop in magnetoresistance and improved critical current density J c [3].…”