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Condensed Matter > Superconductivity

arXiv:1704.01492 (cond-mat)
[Submitted on 5 Apr 2017]

Title:Coexistence of magnetism and superconductivity in separate layers of the iron-based superconductor Li_{1-x}Fe_{x}(OH)Fe_{1-y}Se

Authors:C. V. Topping, F. K. K. Kirschner, S. J. Blundell, P. J. Baker, D. N. Woodruff, F. Schild, H. Sun, S. J. Clarke
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Abstract:The magnetic properties attributed to the hydroxide layer of Li1-xFex(OH)Fe1-ySe have been elucidated by the study of superconducting and nonsuperconducting members of this family. Both ac magnetometry and muon spin relaxation measurements of nonsuperconductors find a magnetic state existing below approximately 10 K which exhibits slow relaxation of magnetization. This magnetic state is accompanied by a low-temperature heat capacity anomaly present in both superconducting and nonsuperconducting variants suggesting that the magnetism persists into the superconducting state. The estimated value of magnetic moment present within the hydroxide layer supports a picture of a glassy magnetic state, probably comprising clusters of iron ions of varying cluster sizes distributed within the lithium hydroxide layer.
Comments: 10 pages, 8 figures, Phys. Rev. B in press
Subjects: Superconductivity (cond-mat.supr-con); Strongly Correlated Electrons (cond-mat.str-el)
Cite as: arXiv:1704.01492 [cond-mat.supr-con]
  (or arXiv:1704.01492v1 [cond-mat.supr-con] for this version)
  https://doi.org/10.48550/arXiv.1704.01492
Related DOI: https://doi.org/10.1103/PhysRevB.95.134419

Submission history

From: Stephen Blundell [view email]
[v1] Wed, 5 Apr 2017 15:35:33 UTC (1,577 KB)
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