Superconductor-semiconductor-super- conductor junction network in bulk polycrystalline composites Y3/4Lu1/4Ba2Cu3O7+ Cu1-xLixO

Петров, М. И.; Balaev, D. A.; Shaihutdinov, K.A.; Aleksandrov, K. S.

doi:10.1088/0953-2048/14/9/333

Cited by 21 publications

(14 citation statements)

References 40 publications

(85 reference statements)

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“…Their potential application as cryogenic magnetic sensors was pointed out since their discovery, but this did not materialize due to the fact that the size of MR effect is small. In addition, the temperature range where the polycrystalline 3 Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

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Large magnetoresistive effect in bulk Bi2212 with small additions of USr₂CaO₆

Ionescu¹,

Winton²,

Silver³

et al. 2004

J. Phys. D: Appl. Phys.

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A large magnetoresistive (MR) effect was observed in Bi2212 in which USr2CaO6 was added in a proportion of 6 wt%. The resistivity of melt-textured (MT) Bi2212 + 6 wt% USr2CaO6 possess a high sensitivity to applied dc fields, as compared to pure Bi2212, in particular at low fields, below 3 T, and in a temperature range between 45 and 85 K. In this temperature range, the MR effects of MT Bi2212 + 6 wt% USr2CaO6 display a maximum that may be tuned to a particular temperature within the above range, by changing the amount of added non-superconducting compound. X-ray results show that during the melt-texturing process of this mixture, the USr2CaO6 phase is stable and the reaction with Bi2212 matrix is minimal, in spite of a small decrease in the superconducting transition temperature. A cryogenic sensor was build and tested at 77 K in low fields. It shows high sensitivity and no hysteresis of resistivity when the applied field was cycled between 0 and 1 T.

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Section: Introductionmentioning

confidence: 99%

“…In previous studies it has been shown that doping the bulk Y123 with CuO [3] or with BaPb 1−x Sn x O 3 [4], leads to a significant increase in the MR response at low magnetic fields as compared to pure Y123. The downside was a hysteretic behaviour reported for the measured resistivity with the cycling of the applied field.…”

Section: Introductionmentioning

confidence: 99%

Large magnetoresistive effect in bulk Bi2212 with small additions of USr₂CaO₆

Ionescu¹,

Winton²,

Silver³

et al. 2004

J. Phys. D: Appl. Phys.

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“…The composite sample (hereinafter, YBCO-comp) containing 77.5 vol % of the Y 0.75 Lu 0.25 Ba 2 Cu 3 O 7 superconductor and 22.5 vol % of copper oxide CuO was prepared by fast backing technique [53,72]. In this method, the Y 0.75 Lu 0.25 Ba 2 Cu 3 O 7 HTS preliminary prepared by the solid-state synthesis and characterized was used, which was milled in a powder and added with the reagent CuO of special purity grade in a required ratio.…”

Section: R H T I R B H T I R E B H T I Ktmentioning

confidence: 99%

“…At the same time, the electrical resistivity ρ in the normal (95 K) state also increases (see Table 1) and there is the correlation with the physical density. In the HTS composites prepared by fast backing technique, the nonsuperconducting component acts as grain boundaries [53,72] and the introduction of an insulator [14,53,72] leads to additional weakening of the Josephson coupling and, consequently, to the very low J C values and high resistivity in the normal state.…”

Section: Intragrain and Intergrain Critical Current And Resistive Transitionmentioning

confidence: 99%

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Universal Behavior and Temperature Evolution of the Magnetoresistance Hysteresis in Granular High-Temperature Superconductors Y–Ba–Cu–O

2021

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Regularities in the behavior of the magnetoresistance hysteresis R(H) in the granular yttrium hightemperature superconductors (HTSs) have been established. For this purpose, a comparative analysis of the magnetotransport properties has been carried out on the granular HTS samples, which exhibit (i) approximately the same magnetic properties and temperatures of the onset of the superconducting transition (90.5-93.5 K, which is characteristic of HTS grains) and (ii) different critical transport currents J C (which is characteristic of grain boundaries). Despite a significant (by more than an order of magnitude) spread of the J C values for the three samples, a universal behavior of the magnetoresistance hysteresis has been found, which is apparently inherent in all the granular Y-Ba-Cu-O compounds. The R(H) hysteresis is extremely broad and, in a fairly wide external field range, the dependence of the magnetoresistance hysteresis width ΔН on the field H dec (the external field for the decreasing hysteresis branch is Н = H dec ) is almost linear: ΔH ≈ H dec . This behavior is observed over the entire temperature range of implementation of the superconducting state (the investigations have been carried out at temperatures of 77-88 and 4.2 K). The result obtained has been explained by considering the effective field in grain boundaries, which is a superposition of the external field and the field induced by the magnetic moments of grains. The field induced by grains, in turn, significantly increases in the region of grain boundaries due to the magnetic flux compression (the grain boundary length is shorter than the HTS grain size by several orders of magnitude). The aforesaid has been confirmed by the analysis of the R(H) hysteresis for the Y-Ba-Cu-O-and CuO-based HTS composite, in which the grain boundary length is purposefully increased; as a result, the flux compression is less pronounced and the R(H) hysteresis narrows.

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New Evidence of Interaction Between Grain and Boundaries Subsystems in Granular High-Temperature Superconductors

Balaev

Semenov

Gokhfeld

2021

J Supercond Nov Magn

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Superconductor-semiconductor-super- conductor junction network in bulk polycrystalline composites Y_3/4Lu_1/4Ba₂Cu₃O₇+ Cu_1-xLi_xO

Cited by 21 publications

References 40 publications

Large magnetoresistive effect in bulk Bi2212 with small additions of USr₂CaO₆

Large magnetoresistive effect in bulk Bi2212 with small additions of USr₂CaO₆

Universal Behavior and Temperature Evolution of the Magnetoresistance Hysteresis in Granular High-Temperature Superconductors Y–Ba–Cu–O

New Evidence of Interaction Between Grain and Boundaries Subsystems in Granular High-Temperature Superconductors

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Superconductor-semiconductor-super- conductor junction network in bulk polycrystalline composites Y3/4Lu1/4Ba2Cu3O7+ Cu1-xLixO

Cited by 21 publications

References 40 publications

Large magnetoresistive effect in bulk Bi2212 with small additions of USr2CaO6

Large magnetoresistive effect in bulk Bi2212 with small additions of USr2CaO6

Universal Behavior and Temperature Evolution of the Magnetoresistance Hysteresis in Granular High-Temperature Superconductors Y–Ba–Cu–O

New Evidence of Interaction Between Grain and Boundaries Subsystems in Granular High-Temperature Superconductors

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Superconductor-semiconductor-super- conductor junction network in bulk polycrystalline composites Y_3/4Lu_1/4Ba₂Cu₃O₇+ Cu_1-xLi_xO

Large magnetoresistive effect in bulk Bi2212 with small additions of USr₂CaO₆

Large magnetoresistive effect in bulk Bi2212 with small additions of USr₂CaO₆