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首页> 外文期刊>Physica, C. Superconductivity and its applications >Effects of the weak disorder on the vortex phase diagram and the second peak in untwinned YBa_2Cu_3O_y single crystals
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Effects of the weak disorder on the vortex phase diagram and the second peak in untwinned YBa_2Cu_3O_y single crystals

机译:弱无序对未缠绕的YBa_2Cu_3O_y单晶的涡流相图和第二个峰的影响

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摘要

Magnetization and resistivity measurements have been performed in untwinned YBa_2Cu_3O_y single crystals with slightly different oxygen contents near the optimal condition. For slightly overdoped samples, the steep increase of the magnetization at H~*, which is connected with the critical point, is consistent with the field-driven disordering transition. For the slightly underdoped sample, on the other hand, the vortex phase diagram shows no remarkable feature near the critical point due to the enhanced disorder by the oxygen deficiency.
机译:磁化和电阻率测量是在最佳条件下对氧含量略有不同的未缠绕YBa_2Cu_3O_y单晶进行的。对于稍微过量掺杂的样品,与临界点有关的H〜*处的磁化强度的急剧增加与场驱动的无序跃迁一致。另一方面,对于轻度掺杂的样品,由于缺氧导致的紊乱加剧,涡流相图在临界点附近没有显示出明显的特征。

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