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INFLUENCE OF WEAK VISIBLE LIGHT ON FLUX CREEP IN YBCO FILM AT LOW TEMPERATURES

机译:弱可见光对低温下YBCO薄膜通量蠕变的影响

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We present an experimental study of flux creep in YBCO film. A ring-shaped film was used to directly obtain voltage-current characteristics of the film in a flux creep regime. It is shown that the flux creep can be described in terms of quantum tunneling of vortices up to temperatures of 10-15 K. We have also investigated the influence of weak illumination on flux creep rate. It is shown that visible light with intensity less than 1 mW/cm(2) drastically accelerates the flux creep at liquid helium temperatures. The influence of light is completely different to that caused by the temperature rise. We propose a simple qualitative model to explain the high sensitivity of the flux creep to weak illumination. [References: 5]
机译:我们目前在YBCO膜中进行磁通蠕变的实验研究。使用环形薄膜直接在通量蠕变状态下获得薄膜的电压-电流特性。结果表明,通量蠕变可以用高达10-15 K的涡旋的量子隧穿来描述。我们还研究了弱照明对通量蠕变率的影响。结果表明,强度小于1 mW / cm(2)的可见光会大大加速液氦温度下的通量蠕变。光的影响与温升引起的影响完全不同。我们提出了一个简单的定性模型来解释通量蠕变对弱照明的高灵敏度。 [参考:5]

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