Long length Y-123 superconducting tapes were produced by reel-to-reel continuous vacuum processing, by using IonBeam-Assisted Deposition (IBAD) and Pulsed-Laser-Deposition (PLD). Biaxially textured Gd 2 Zr 2 O 7 buffer layers up to 255-m long were fabricated by IBAD with production speed of 0.5-1.0 m/h. Y-123 films were formed on them by PLD with production speed of 1.0-4.0 m/h. A 105-m long Y-123 film was fabricated with uniform thickness of 1.0 m and 1 of 3-4 . of 126 A was obtained in end-to-end at 77 K, 0 T, whose I-V curve had n-value of 28.5. times length reached 13,230 Am. Another 70-m long Y-123 tape with over 90 A (77 K, 0 T) was wound into a Solenoid type magnet whose inner diameter was 60 mm. The central field of 0.27 T was obtained at 66 K, with operating current of 130 A.

100 m class Y-123 coated conductors were produced by using reel-to-reel vacuum ion-beam-assisted-deposition (IBAD) and pulsed-laser-deposition (PLD) apparatuses. 100 m long IBAD-Gd 2 Zr 2 O 7 template films were uniformly and routinely obtained on non-textured Ni-alloy tapes, with FWHM of φ below 10 • . Y-123 films with FWHM of φ below 7 • were formed on them by PLD. End-to-end I c of 38 A and J c of 0.76 MA cm −2 (77 K, self-field) were obtained in a 100 m long sample. For further texture improvement, secondary buffer layers of CeO 2 and Gd 2 Zr 2 O 7 grown by PLD on IBAD-Gd 2 Zr 2 O 7 template films were studied. φ of 3 • and J c of 2.9 MA cm −2 were obtained in a 0.1 m long Y-123 film and J c improved to 1.6 MA cm −2 for an 80 m long Y-123 tape by using the CeO 2 buffer layers.

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The critical behaviour of an anisotropic n-vector model with purely Ising-like coupling is studied on the FCC lattice by means of high-temperature series. The model includes the s = i (n = 1) and s = m (n = 3) Ising models as special cases and exhibits rigorously mean-field behaviour at n = CO. The crossover region, l / n --f 0, t = (1t./cC) + 0, is examined in detail. The susceptibility exponent y remains Ising-like for all finite n. The critical temperature and critical susceptibility amplitude vary as lin.

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