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arXiv 1009.2883cond-mat.str-elcond-mat.supr-con
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CeCoIn5中脆性反铁磁超导相的研究

Exploring the fragile antiferromagnetic superconducting phase in CeCoIn5

E. Blackburn, P. Das, M. R. Eskildsen, E. M. Forgan, M. Laver, C. Niedermayer, C. Petrovic, J. S. White

摘要:

CeCoIn 5是一种重费米子II型超导体,具有明显的Pauli极限超导性。各种各样的测量提供了证据,证明在超导状态内部的高磁场下,当磁场平行于或垂直于c轴时,会发生转变。当磁场垂直于c轴时,在过渡的高场侧观察到反铁磁有序,磁波矢为(q q 0.5),其中q = 0.44倒易晶格单元。我们发现,这种顺序仍然是作为磁场旋转出基面,但相关的时刻最终消失17度以上,表明与平行于c轴的磁场所看到的异常是不相关的磁序。我们讨论了这一发现的影响。

英文摘要:

CeCoIn5 is a heavy fermion Type-II superconductor which exhibits clear indications of Pauli-limited superconductivity. A variety of measurements give evidence for a transition at high magnetic fields inside the superconducting state, when the field is applied either parallel to or perpendicular to the c axis. When the field is perpendicular to the c axis, antiferromagnetic order is observed on the high-field side of the transition, with a magnetic wavevector of (q q 0.5), where q = 0.44 reciprocal lattice units. We show that this order remains as the magnetic field is rotated out of the basal plane, but the associated moment eventually disappears above 17 degrees, indicating that the anomalies seen with the field parallel to the c axis are not related to this magnetic order. We discuss the implications of this finding.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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