Critical currents and flux creep in orientated BiPbSrCaCuO 110 K phase made by the powder in tube method

Yamada, Yutaka; Murase, S.; Yamamoto, K.; Kamisada, Y.

doi:10.1016/0011-2275(90)90288-n

Cited by 16 publications

(2 citation statements)

References 12 publications

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“…Some authors have claimed significant departures from that value, for example: n = 4 in BSCCO:2223 below .-.80 K [41], n = 3 in BSCCO:2223 [42] and TICBCO:2223 [43], n = 2.19-2.99 in BSCCO:2223 [44], and n = 1.17-1.52 in BSCCO:2212 [45]. But as first indicated by Yamada et al [41] and later more specifically by de Rango et al [40] and Shiet al [46] major departures from the Yeshurun-Malozemoff power-law itself may be encountered in BSCCO:2223 (also in BSCCO:2212 [47]) as the ternaerature drops 30 K or so below Tc. As pointed out by Ku and Shi [46] at sufficiently high fields H, decreases exponentially with temperature due to a gradual breakdown of interlayer proximity coupling.…”

Section: Lrreversibility Fieldmentioning

confidence: 99%

Magnetic Properties and Irreversibility Behavior in Ag-Sheathed Bi-Based Superconducting Wires Fabricated Using a Controlled Melt Procedure

Dou

Liu

Guo

et al. 1993

Advances in Superconductivity V

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A significant enhancement of the in-field Jc of Ag-clad (Bi,Pb)-Sr-Ca-C"u-O (BPSCCO:2223) wires has been achieved using a controlled melt procedure. The greatly reduced weak linking has resulted in an extended plateau regime in the Jc-H curve. Jcs of 40,000 A/cre 2 at 77 K (self field) and 9,000 A/cre 2 at 77 K (1 "lr) have been achieved. The improved Jc-H characteristics may I_e attributed to microstructures consisting of uniform grain alignment throughout the entire cross section, intimate connection between grains, impurities within the grains, and an optimal level of 6ispersed 2212 phase. Irreversibility line measurements using both AC susceptibility in DC fields (reported elsewhere), and magnetization measurements, have indicated that flux pinning can be enhanced in the melt-processed samples over the results of normal solid-state processing with its less-than optimal 2212-phase content. But sufficiently long annealing times during the "normal" route may achieve 2212-phase content and Jes which are comparable to those of melt-processed samples.

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Section: Lrreversibility Fieldmentioning

confidence: 99%

Magnetic Properties and Irreversibility Behavior in Ag-Sheathed Bi-Based Superconducting Wires Fabricated Using a Controlled Melt Procedure

Dou

Liu

Guo

et al. 1993

Advances in Superconductivity V

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“…In this case, the textured Y(123) contained a large amount of Y2BaCuOs precipitates, and it was argued that these precipitates enhance critical current density. Similarly, in a single crystalline [27] and a textured [28] Bi(2212). upward movements of T,(H) were observed with increasing flux pinning.…”

Section: Irreversibility Temperaturesmentioning

confidence: 99%

Magnetically measured irreversibility temperatures in superconducting oxides and alloys

Suenaga

Welch

Budhani

1992

Supercond. Sci. Technol.

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Irreversibility temperatures T,(H) were magnetically measured for the aligned powders of superconducting oxides, La1.85Sr0.15Cu04, YBa2Cu307, Bi2Sr~CaCu208, and Bi2Sr2Ca2Cu3010, and for the metallic superconductors, Nb, Nbof the thermally activated flux creep and the lattice or the glass melting models for the irreversibility temperatures. Also, the measurement procedures for TI@) using a SQUID magnetometer are described in detail, since the measuring methods and the criteria which are used for T,(H) are important in the determination and interpretation of the temperatures. Ti, Nb:Sn 2End PbMo&. the res.!ts xe beefly disc.ssed in te?Es ,,,c.aS"Iz*I v y L1113 ,GbrrrL,yur.

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Microstructure and Flux Creep Behavior of Ag-Sheathed Bi-Pb-Sr-Ca-Cu-O Tapes

Yamamoto

Murase

Takeno

et al. 1991

Advances in Superconductivity III

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Critical currents and flux creep in orientated BiPbSrCaCuO 110 K phase made by the powder in tube method

Cited by 16 publications

References 12 publications

Magnetic Properties and Irreversibility Behavior in Ag-Sheathed Bi-Based Superconducting Wires Fabricated Using a Controlled Melt Procedure

Magnetic Properties and Irreversibility Behavior in Ag-Sheathed Bi-Based Superconducting Wires Fabricated Using a Controlled Melt Procedure

Magnetically measured irreversibility temperatures in superconducting oxides and alloys

Microstructure and Flux Creep Behavior of Ag-Sheathed Bi-Pb-Sr-Ca-Cu-O Tapes

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