CAJ | 학술논문

　　介绍了利用在MgO衬底上生长NdBa2Cu3Oy(Nd123)薄膜从而诱导生长GdBa2Cu3Oy(Gd123)超导单畴块材的工艺，并在此基础上研究了使用MgO缓冲层诱导生长钆钡铜氧单畴块材的工艺。通过调整热处理参数和缓冲层中Gd2BaCuO5(Gd211)相的含量，克服了MgO与Gd123母体的晶格失配和低反应率的问题。成功制备了Gd123单畴块材，研究了铁镍软磁合金粒子在超导块材中的掺杂作用。结果表明，0.4%(摩尔分数)为最优掺杂比例，超导临界电流在低场和中场下得到了很大的提升，对工业应用有重要意义。超导电流的提升主要源于铁、镍离子对铜位的替代，并提供了额外的磁通钉扎。
　　개소료이용재MgO츤저상생장NdBa2Cu3Oy(Nd123)박막종이유도생장GdBa2Cu3Oy(Gd123)초도단주괴재적공예，병재차기출상연구료사용MgO완충층유도생장구패동양단주괴재적공예。통과조정열처리삼수화완충층중Gd2BaCuO5(Gd211)상적함량，극복료MgO여Gd123모체적정격실배화저반응솔적문제。성공제비료Gd123단주괴재，연구료철얼연자합금입자재초도괴재중적참잡작용。결과표명，0.4%(마이분수)위최우참잡비례，초도림계전류재저장화중장하득도료흔대적제승，대공업응용유중요의의。초도전류적제승주요원우철、얼리자대동위적체대，병제공료액외적자통정찰。
The process of cold seeding melt growth of GdBa2Cu3Oy (Gd123) bulk superconductors using NdBa2Cu3Oy (Nd123) thin films was reported. In addition, a novel cold seeding concept of combining MgO crystal and buffer pellet was also introduced. The misorientation caused by the lattice mismatch between MgO and Gd123 melt was overcome by choosing suitable heat treatment program and Gd2BaCuO5 (Gd211) content of the buffer pellet. The doping effect of soft ferromagnetic NiFe alloy particles was also reported. The bulk sample with 0.4%(mole fraction) doping amount shows the best performance on the flux trapping. The critical current density is largely enhanced under the external field of 1?2 T, which is promising for large-scale applications. This effect is originated from the substitution of Fe and Ni ions for the Cu sites contributing to magnetic flux pinning.