Large-area uniform ultrahigh-J_cYBa₂Cu₃O_7-xfilm fabricated by the metalorganic deposition method using trifluoroacetates

Abstract

Ultrahigh-Jc YBa2Cu3O7-x (YBCO) films have been successfully fabricated by the metalorganic deposition method using a trifluoroacetate coating solution which is prepared by a newly developed purification technique, the solvent-into-gel (SIG) method. The prepared pure coating solution has less than 0.25% impurities and has a wide flexibility in process conditions to obtain high-Jc YBCO film. Using this feature, we have successfully formed 50 mm diameter YBCO films, which have a critical current density over 10 MA cm-2 (77 K, 0 T) on LaAlO3 single crystalline substrates.

RETRACTED: Doping of Tin-oxides pinning centers into YBCO films by MOD method

“…A metal organic deposition (MOD) process using trifluoroacetates (TFA) is expected as a promising method for REBCO films since this technique can provide the films in a cost-effective process with non-vacuum system [1][2][3][4]. In order to apply REBCO for electric power applications, J c should be enhanced in a magnetic field (B).…”

Ethanol-based TFA–MOD method for preparation of YBCO films

“…Metal-organic deposition using trifluoroacetates (TFA-MOD) method is one of the most promising techniques for the fabrication of high quality YBa 2 Cu 3 O 7-x (YBCO) superconducting thin films [1][2][3][4][5][6][7]. Growth mechanism and influence of various processing parameters for TFA-MOD method have been widely investigated [8][9][10][11][12][13][14].…”

“…Methanol is the most commonly used solvent in TFA-MOD route [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. It is toxic and may cause death or blindness [15], which would involve serious health risk for industrial manufacture.…”

Interplay between aminoalcohols and trifluoroacetate ligands: Ba–Cu heterometallics or cocrystallization of homometallics?

“…The copper species 2b is 6-coordinate by 4 (MeOH) 2 ],2MeOH} 1 (1) (#1 Àx + 1/2,Ày + 1/2,Àz; #2 Àx + 1,y,Àz + 1/2; #3 xÀ1/2,Ày + 1/2,zÀ1/2). [1], as well as of monomeric Ba trifluoroacetate derivatives. No hydrogen bonding was observed between the Ba and the Cu species; only quite long C-HÁ Á ÁF intramolecular interactions (>3.181 Å ) were found for 2b.…”

“…Fluorinated carboxylates have attracted attention recently for the elaboration of high Tc superconductors by metal organic decomposition (MOD) [1]. Their prefential decomposition for barium into BaF 2 represents a means to avoid the formation of the highly stable barium carbonate which is detrimental for the superconducting properties.…”