Tilted BaHfO3 nanorod artificial pinning centres in REBCO films on inclined substrate deposited-MgO coated conductor templates. (22nd March 2017)

• Record Type: Journal Article
• Authors: Stafford, B H; Sieger, M; Ottolinger, R; Meledin, A; Strickland, N M; Wimbush, S C; Van Tendeloo, G; Hühne, R; Schultz, L
• Is Part Of: Superconductor science & technology. Volume 30:Number 5(2017:May)
• Publication Date: 2017-03-22
• Subjects: artificial pinning centre -- BHO -- EB-PVD -- ISD -- nanorod -- PLD -- REBCO; Superconductivity -- Periodicals; Superconductors -- Periodicals; 537.623
• DOI: 10.1088/1361-6668/aa621d
• Languages: English
• ISSNs: 0953-2048

Abstract

Abstract: We grow BaHfO3 (BHO) nanorods in REBa2 Cu3 O7− x (REBCO, RE: Gd or Y) thin films on metal tapes coated with the inclined substrate deposited (ISD)-MgO template by both electron beam physical vapour deposition and pulsed laser deposition. In both cases the nanorods are inclined by an angle of 21°–29° with respect to the sample surface normal as a consequence of the tilted growth of the REBCO film resulting from the ISD-MgO layer. We present angular critical current density ( J c ) anisotropy as well as field- and temperature-dependant J c data of the BHO nanorod-containing GdBCO films demonstrating an increase in J c over a wide range of temperatures between 30 and 77 K and magnetic fields up to 8 T. In addition, we show that the angle of the peak in the J c anisotropy curve resulting from the nanorods is dependent both on temperature and magnetic field. The largest J c enhancement from the addition of the nanorods was found to occur at 30 K, 3 T, resulting in a J c of 3.0 MA cm −2 .