TY - JOUR
T1 - Magnetization studies of K 0.8Fe 1.7Se 2 single crystals
AU - Felner, I.
AU - Jin, S.
AU - Wang, G.
AU - Wang, S.
AU - Zhu, K.
AU - Zhou, T.
PY - 2011/10
Y1 - 2011/10
N2 - Magnetization measurements of the magnetosuperconducting K 0.8Fe 1.7Se 2 single crystals (TC = 29.6 K) at various applied fields and temperatures have been performed. In the superconducting range, two unusual phenomena are observed. (i) The presence of paramagnetic Meissner effect up to 20 Oe, which is revealed by the positive field-cooled magnetization curves. (ii) A double peak in the hysteresis loop at low temperatures. The isothermal magnetization measured at 35 K clearly indicates the presence of a tiny amount of a ferromagnetic substance (probably pure Fe). The two peculiar phenomena observed are attributed to this impurity.
AB - Magnetization measurements of the magnetosuperconducting K 0.8Fe 1.7Se 2 single crystals (TC = 29.6 K) at various applied fields and temperatures have been performed. In the superconducting range, two unusual phenomena are observed. (i) The presence of paramagnetic Meissner effect up to 20 Oe, which is revealed by the positive field-cooled magnetization curves. (ii) A double peak in the hysteresis loop at low temperatures. The isothermal magnetization measured at 35 K clearly indicates the presence of a tiny amount of a ferromagnetic substance (probably pure Fe). The two peculiar phenomena observed are attributed to this impurity.
KW - Fe-Se based materials
KW - Paramagnetic Meissner effect
KW - Superconductivity
UR - http://www.scopus.com/inward/record.url?scp=80055008721&partnerID=8YFLogxK
U2 - 10.1007/s10948-011-1206-5
DO - 10.1007/s10948-011-1206-5
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AN - SCOPUS:80055008721
SN - 1557-1939
VL - 24
SP - 2033
EP - 2036
JO - Journal of Superconductivity and Novel Magnetism
JF - Journal of Superconductivity and Novel Magnetism
IS - 7
ER -