TY - JOUR
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.
UR - http://www.scopus.com/inward/record.url?scp=80052277713&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.84.052503
DO - 10.1103/PhysRevB.84.052503
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AN - SCOPUS:80052277713
SN - 1098-0121
VL - 84
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 5
M1 - 052503
ER -