Superconducting critical fields of single-crystalline K 0.73Fe1.68Se2

M. I. Tsindlekht; I. Felner; M. Zhang; A. F. Wang; X. H. Chen

doi:10.1103/PhysRevB.84.052503

Superconducting critical fields of single-crystalline K _0.73Fe_1.68Se₂

M. I. Tsindlekht^*
, I. Felner
, M. Zhang
, A. F. Wang
, X. H. Chen

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

We report the results of an experimental study of dc and low-frequency magnetic properties of a K_0.8Fe_2-ySe₂ single crystal when the dc magnetic field is applied parallel to the ab plane. From the data obtained, we deduce the full H-T phase diagram, which consists of all three H_c1(T), H_c2(T), and H_c3(T) critical magnetic-field plots. The two H_c1(T) and H_c2(T) curves were obtained from dc magnetic measurements, whereas the surface critical-field H_c3(T) line was extracted by ac susceptibility studies. It appears that near T_c, the H_c3(T)/H_c2(T) ratio is ≈4.4, which is much larger than expected.

Original language	English
Article number	052503
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	84
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.84.052503
State	Published - 8 Aug 2011

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title = "Superconducting critical fields of single-crystalline K 0.73Fe1.68Se2",

abstract = "We report the results of an experimental study of dc and low-frequency magnetic properties of a K0.8Fe2-ySe2 single crystal when the dc magnetic field is applied parallel to the ab plane. From the data obtained, we deduce the full H-T phase diagram, which consists of all three Hc1(T), Hc2(T), and Hc3(T) critical magnetic-field plots. The two Hc1(T) and Hc2(T) curves were obtained from dc magnetic measurements, whereas the surface critical-field Hc3(T) line was extracted by ac susceptibility studies. It appears that near Tc, the Hc3(T)/Hc2(T) ratio is ≈4.4, which is much larger than expected.",

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T1 - Superconducting critical fields of single-crystalline K 0.73Fe1.68Se2

AU - Tsindlekht, M. I.

AU - Felner, I.

AU - Zhang, M.

AU - Wang, A. F.

AU - Chen, X. H.

PY - 2011/8/8

Y1 - 2011/8/8

N2 - We report the results of an experimental study of dc and low-frequency magnetic properties of a K0.8Fe2-ySe2 single crystal when the dc magnetic field is applied parallel to the ab plane. From the data obtained, we deduce the full H-T phase diagram, which consists of all three Hc1(T), Hc2(T), and Hc3(T) critical magnetic-field plots. The two Hc1(T) and Hc2(T) curves were obtained from dc magnetic measurements, whereas the surface critical-field Hc3(T) line was extracted by ac susceptibility studies. It appears that near Tc, the Hc3(T)/Hc2(T) ratio is ≈4.4, which is much larger than expected.

AB - We report the results of an experimental study of dc and low-frequency magnetic properties of a K0.8Fe2-ySe2 single crystal when the dc magnetic field is applied parallel to the ab plane. From the data obtained, we deduce the full H-T phase diagram, which consists of all three Hc1(T), Hc2(T), and Hc3(T) critical magnetic-field plots. The two Hc1(T) and Hc2(T) curves were obtained from dc magnetic measurements, whereas the surface critical-field Hc3(T) line was extracted by ac susceptibility studies. It appears that near Tc, the Hc3(T)/Hc2(T) ratio is ≈4.4, which is much larger than expected.

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Superconducting critical fields of single-crystalline K _0.73Fe_1.68Se₂

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