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We have fabricated GdBa2Cu3O7-δ (Gd123) thin films doped Gd2CuO4 (Gd214) as artificial pins on LaAlO3 single crystal substrate by fluorine-free metal organic decomposition method and investigated their crystallinity and magnetic field angle dependence of JC-B properties. Recently, we have succeeded in fabricating Gd123 crystals introduced Gd214 as effective artificial pinning centers. TEM observation revealed that Gd214 crystals form plate-like 15-20 unit cells perpendicular to the c-axis of Gd123 crystals. Therefore, the pinning force densities Fp may be maximum at μ0H ⊥ c-axis by contrast of normal BaMO3 particle pins We measured the transport currents by changing the applied magnetic field angle from 0° to 120°. As a result, a significant increase in Fp was confirmed in the magnetic field perpendicular to the c-axis of Gd123 crystals. Furthermore, the amount of Gd214 introduced that maximizes Jc was clarified.
