TY - JOUR
T1 - Granularity and intragrain penetration depth in RuSr2GdCu2O8
AU - Xue, Y. Y.
AU - Lorenz, B.
AU - Meng, R. L.
AU - Baikalove, A.
AU - Chu, C. W.
N1 - Funding Information:
This work is supported in part by the State of Texas through TCSUH, NSF, the T. L. L. Temple Foundation, the John and Rebecca Moores Endowment and DOE through LBNL.
PY - 2001/11
Y1 - 2001/11
N2 - The multi-stage transition of RuSr2GdCu2O8 (Ru1212) ceramic samples was investigated. An intergrain phase-lock temperature of T2 is identified around 10-30 K. Slightly above T2, however, an isolated Ru1212 grain still behaves as a Josephson-junction array of superconductive nano-domains, which are phase-locked below an interdomain phase-lock temperature (intragrain transition-temperature) of T1 ≈ 33-40 K. The intragrain penetration depth λ1 was subsequently deduced from the ac susceptibility χ′ of powders with different particle-size d (0.3≤d≤10 μm in this work) between T1 and T2. The sample-dependent λ1 ≈ 2.5-6 μm so obtained is extremely long, and bears a systematic correlation with the T1 observed. A phase-separation model was proposed to interpret the data.
AB - The multi-stage transition of RuSr2GdCu2O8 (Ru1212) ceramic samples was investigated. An intergrain phase-lock temperature of T2 is identified around 10-30 K. Slightly above T2, however, an isolated Ru1212 grain still behaves as a Josephson-junction array of superconductive nano-domains, which are phase-locked below an interdomain phase-lock temperature (intragrain transition-temperature) of T1 ≈ 33-40 K. The intragrain penetration depth λ1 was subsequently deduced from the ac susceptibility χ′ of powders with different particle-size d (0.3≤d≤10 μm in this work) between T1 and T2. The sample-dependent λ1 ≈ 2.5-6 μm so obtained is extremely long, and bears a systematic correlation with the T1 observed. A phase-separation model was proposed to interpret the data.
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U2 - 10.1016/S0921-4534(01)00765-1
DO - 10.1016/S0921-4534(01)00765-1
M3 - Article
AN - SCOPUS:0035499547
SN - 0921-4534
VL - 364-365
SP - 251
EP - 253
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
ER -