On the mechanism of thickness dependence of the critical current density in HTS cuprate epitaxial films

Jc anisotropy for magnetic field angle in YBCO coated conductor on IBAD-MgO buffered metal tapes

“…However, the IBAD-YBCO with a film thickness of 900 nm is not the highest J c in a magnetic field because J c at self-field is lower than that in other films due to the thicker thickness. This tendency is similar to that of the other report [11]. Though J c for a thickness of 900 nm is lower than other films, I c per unit width is higher than other films.…”

“…Film thickness also influences superconducting properties of REBCO thin films [10,11]. Thus, we investigated an effect of the film thickness on c-axis correlated pinning centers.…”

Application of Nd:YAG laser to preparation of REBa2Cu3Ozfilms for wire processing (RE: Y or rare-earth element)

“…Several reports reveal that the nanostructure of pulsed-laser-deposited epitaxial REBCO films is evolving during growth due to high dislocation mobility and this causes degradation of the J c in thick films [15,16]. As an initial step, therefore, relatively thin films with thickness of 200-250 nm were fabricated.…”

Optimizing Flux Pinning of <inline-formula> <tex-math notation="TeX">$\hbox{YBa}_{2}\hbox{Cu}_{3}\hbox{\rm O}_{7\hbox{-}{\delta}} $</tex-math></inline-formula> (YBCO) Thin Films With Unique Large Nanoparticle Size and High Concentration of <inline-formula> <tex-math notation="TeX">$\hbox{\rm Y}_{2}\hbox{BaCuO}_{5}$</tex-math></inline-formula> (Y211) Additions

“…The Y211 adatom mobility from high deposition temperatures, allows it to migrate to the YBCO threading dislocation cores. This lowers the high surface energy initially present at these dislocations [27]. The Y211 particles continue to grow until entropy, energy, and strain limits are reached.…”

“…The highest surface energy exists at the exits of the threading dislocation cores. The high mobility of Y211 due to deposition temperatures, allows Y211 growth to begin Y 2 at YBCO dislocations and lower the surface free energy [27]. The sharper interface between YBCO and the Y211 allows for larger particle growth.…”