Simplified fast method for magnetic characteristics measurement of the HTc superconducting materials

Zrubec, V.; Cigáň, A.; Maňka, J.

doi:10.1016/0921-4534(94)90699-8

Cited by 21 publications

(10 citation statements)

References 5 publications

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“…AC low eld magnetization M AC at 77 K was measured by a compensation method using the second-order SQUID gradiometer [3] and DC magnetization M DC at higher eld and lower temperature by the Quantum Design SQUID magnetometer MPMS XL-7.…”

Section: Methodsmentioning

confidence: 99%

Effects of Ru Addition on the Superconducting Properties of the Eu-123 System

et al. 2015

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Eects of the Ru addition on the structural and superconducting properties of the Eu-123 system were studied. Samples of the nominal composition EuBa2Cu3−xRuxO 7−δ with x ranging from 0.0 to 0.7 were prepared by the solid state reaction technique from Eu2O3, BaCO3, CuO and RuO2 precursors at the temperature of 1050• C for 72 h in owing oxygen and oxygen-annealed at 580• C for 24 h. X-ray diraction data show the presence of another BaEuRuO phase, for x ≥ 0.03, in addition to the main superconducting phase. AC and DC magnetization characteristics were measured by the compensation method using the second-order SQUID gradiometer at ≈ 77 K and the QD SQUID magnetometer MPMS XL-7 at 20 K. The superconducting properties, Tc, ∆Tc, change only weakly up to x = 0.2, and magnetization M (H) deteriorates with an increasing Ru content.

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Section: Methodsmentioning

confidence: 99%

Effects of Ru Addition on the Superconducting Properties of the Eu-123 System

et al. 2015

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“…The phase composition was studied by X-ray diraction measurements (CuK α radiation). AC low eld magnetization at 77 K was measured by a compensation method using the second-order SQUID gradiometer [6]. The temperature dependences of the zero-eld cooled (ZFC) and eld cooled (FC) DC magnetic moment of samples were measured in the Quantum Design SQUID magnetometer MPMS XL-7 at eld of 1.6 kA·m −1 and 5.6 MA·m −1 .…”

Section: Methodsmentioning

confidence: 99%

Effects of Gd/Ba Nonstoichiometry in Gd_{1+x}Ba_{2-x}Cu_{3}O_{7-δ} on Superconducting and Magnetic Properties

et al. 2014

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Eects of slight nonstoichiometry in Gd1+xBa2−xCu3O 7−δ compounds on superconducting and magnetic properties were studied. The series of single-phase samples of Gd1+xBa2−xCu3O 7−δ with composition deviation x from the stoichiometric value of 0 to 0.1 and to −0.1 were synthesized by the solid-state reaction method from Gd2O3, BaCO3 and CuO precursors, sintered at the temperature of ∼ 1000• C in owing oxygen and annealed at 450• C for 24 h.

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“…The transition width, ∆T c , was charac-214 Unauthenticated Download Date | 5/13/18 9:54 AM terized by using the 10-90% criterion. AC volume magnetization, M, characteristics were measured by the compensation method using second-order SQUID gradiometer [18]. Magnetization characteristics were measured in the field ranging from 10 −1 to 10 5 Am −1 at 77 K after zerofield cooling at the frequency of 0.1 Hz.…”

Section: Methodsmentioning

confidence: 99%

Effects of low-level La doping and ageing on TlPb-1223 high T c superconductors

et al. 2010

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Abstract:Bulk samples of the nominal composition of (Tl 0.6 Pb 0.5 )(Sr 0.8 Ba 0.2 ) 2 Ca 2 Cu 3 O 8+δ -xLaO 1.5 (x = 0 − 0.1) were prepared by using two-step process and their microstructure, T c values, and magnetization were studied. The samples consist of the Tl-1223 dominant phase with small Tl-1212 admixture, which increases with a rise of La content. Five years ageing and following oxygen annealing at 450°C and subsequently at 750°C have only a modest effect on T c values of the studied samples. Low-level La doping (x = 0.04) leads to an increase of T c values by about 2 K in comparison with undoped samples. Oxygen annealing at 750°C results in an increase in the volume magnetization hysteresis in low applied magnetic fields and rise of critical current density at zero magnetic field and 77 K. This effect is most pronounced for the low La doped sample with x = 0.04. Changes of the induced voltage, U originating in the Meissner effect and of its harmonics in dependence on temperature were measured and used for characterization of the temperature distribution of inter-grain junctions.

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Simplified fast method for magnetic characteristics measurement of the HTc superconducting materials

Cited by 21 publications

References 5 publications

Effects of Ru Addition on the Superconducting Properties of the Eu-123 System

Effects of Ru Addition on the Superconducting Properties of the Eu-123 System

Effects of Gd/Ba Nonstoichiometry in Gd_{1+x}Ba_{2-x}Cu_{3}O_{7-δ} on Superconducting and Magnetic Properties

Effects of low-level La doping and ageing on TlPb-1223 high T c superconductors

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