通过建立磁通线的量子隧穿模型,并结合热激活磁通运动下的理论结果,本文对0～30 K范围内高温超导体YBCO的磁弛豫现象进行了研究,得出了在该温度范围内量子隧穿效应和热激活磁通运动混合共存的重要结论.
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