TY - JOUR
T1 - Crypto-superconductivity in RuSr2GdCu2O8
AU - Xue, Y. Y.
AU - Tsui, S.
AU - Cmaidalka, J.
AU - Meng, R. L.
AU - Lorenz, B.
AU - Chu, C. W.
PY - 2000
Y1 - 2000
N2 - The susceptibility x = x′ + ix″ of RuSr2GdCu2O8 powders at 2 K has been deduced from ac and dc magnetizations with their particle size d from 800 to 10 μm and grain size 1-5 μm. It is observed that the loss part, x″, scales with d over a field range of 0.0001 to 100 Oe, suggesting that the supercurrent is homogeneously distributed over particles as small as 10 μm. However, the inductance part, x′, decreases with d systematically and drastically. An effective penetration depth as large as 30-50 μm is needed, which suggests a very small super-carrier concentration. Crypto-superconductivity is proposed to accommodate the data.
AB - The susceptibility x = x′ + ix″ of RuSr2GdCu2O8 powders at 2 K has been deduced from ac and dc magnetizations with their particle size d from 800 to 10 μm and grain size 1-5 μm. It is observed that the loss part, x″, scales with d over a field range of 0.0001 to 100 Oe, suggesting that the supercurrent is homogeneously distributed over particles as small as 10 μm. However, the inductance part, x′, decreases with d systematically and drastically. An effective penetration depth as large as 30-50 μm is needed, which suggests a very small super-carrier concentration. Crypto-superconductivity is proposed to accommodate the data.
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U2 - 10.1016/S0921-4534(00)00661-4
DO - 10.1016/S0921-4534(00)00661-4
M3 - Article
AN - SCOPUS:0342528062
VL - 341-348
SP - 483
EP - 484
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - PART 1
ER -