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For single crystalline and melt-textured samples there exist several different activation energies for fluxoid creep, which are related to various vortex orientations and hopping directions. We discuss how to obtain these anisotropic activation energies from magnetic relaxation data and present measured results of a melt-textured YBCO sample. 相似文献
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本文测量了~4He在微孔玻璃中终压强分别为87.67×10~5Pa和88.93×10~5Pa的熔解曲线,发现在0.8K以下,压强达61×10~5Pa,微孔中还有液体存在,并表现有超流相变的行为。 相似文献
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