Physical, electrical, transport and magnetic properties of Nd(Ba,Nd)2.1Cu3O7−δ system

Altın, E.; Gokhfeld, D. M.; Kurt, F.; Yakıncı, Zehra Deniz

doi:10.1007/s10854-013-1526-2

Cited by 11 publications

(10 citation statements)

References 52 publications

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“…The peak in the j peak c (B) dependence is accompanied by a decrease of l s values such that l s,2 /l s,1 ≈ j c,1 /j c,2 . This relation is observed in asymmetric magnetization loops with the peak effect 14,[24][25][26][27] . The depth of the equilibrium region during the order-disorder transition changes as…”

Section: Peak Effect and Critical Currentmentioning

confidence: 74%

Use of a Sigmoid Function to Describe Second Peak in Magnetization Loops

Gokhfeld

2017

J Supercond Nov Magn

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Order-disorder transitions of a vortex lattice transfer type-II superconductors from a low critical current state to a high one. The similar transition between different current states can be caused by electromagnetic granularity. A sigmoid curve is proposed to describe the corresponding peak in a field dependence of the macroscopic critical density. Using the extended critical state model, analytic expressions are obtained for the field dependencies of the local critical current density, the depth of equilibrium surface region, and the macroscopic critical current density. The expressions are well fit to published data.

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Section: Peak Effect and Critical Currentmentioning

confidence: 74%

Use of a Sigmoid Function to Describe Second Peak in Magnetization Loops

Gokhfeld

2017

J Supercond Nov Magn

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“…The values of diamagnetic signal are monotonically growing with increasing of temperature (Figure ), but still a behavior of χ ′( T ) for NdBa 2 Cu 3 O 7− x is different from each other and exhibits a linear dependence up to 88 K, where the sample is no longer in a diamagnetic state . The rest χ ′( T ) curves for SmBa 2 Cu 3 O 7− x , EuBa 2 Cu 3 O 7 −x , and Nd 1/3 Sm 1/3 Eu 1/3 Ba 2 Cu 3 O 7− x have rather an exponential shape with different growing rates.…”

Section: Resultsmentioning

confidence: 90%

“…From The values of diamagnetic signal are monotonically growing with increasing of temperature ( Figure 11), but still a behavior of χ 0 (T) for NdBa 2 Cu 3 O 7Àx is different from each other and exhibits a linear dependence up to 88 K, where the sample is no longer in a diamagnetic state. [27] The rest χ 0 (T) curves for SmBa 2 In turn, the absorption part of the AC magnetic susceptibility (Figure 12) exhibits very broad maxima of absorption related to the energy losses during a partial magnetic field penetration into the interior of samples. value of about 0.008 emu g À1 , which is more than two times higher with respect to other samples.…”

Section: Dependence Of Magnetic Susceptibility On Temperaturementioning

confidence: 99%

Synthesis and Physicochemical Properties of Nd‐, Sm‐, Eu‐Based Cuprate High‐Temperature Superconductors

Pęczkowski

Kowalik

Zachariasz

et al. 2018

Physica Status Solidi (a)

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The aim of the research is to create new high‐temperature superconductors (HTS) NdBa2Cu3O7−x, SmBa2Cu3O7−x, EuBa2Cu3O7−x, and Nd1/3Sm1/3Eu1/3Ba2Cu3O7−x based on light rare earth (LRE) metals. The superconducting materials are investigated for microstructural and physicochemical properties. The paper describes the preparation process of substrate powders and the granulation results of the raw material mixtures before the first calcination, as well as after the first and the second calcination. The granulation analysis of the raw materials are performed using a low‐angle laser light scattering (LALLS) method. Qualitative and quantitative phase analysis of the superconducting materials after the first and the second calcination and after annealing in oxygen atmosphere have been performed by X‐Ray diffraction (XRD) technique. A detailed structural investigations mainly shows the orthorhombic phase with small amounts of BaCuO2 and CuO compounds detected in all samples. A microstructural analysis of materials are carried out by using Raman spectroscopy and scanning electron microscopy (SEM), respectively. The magnetic properties of the superconducting materials are characterized by AC magnetic susceptibility as a function of temperature. The critical current densities at liquid nitrogen temperatures were also measured.

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“…Перед измерениями образец охлаждался в нулевом внешнем поле. [52,54,56]. Видимо, это вызвано частичной экранировкой от внешнего магнитного поля ионов Ho внутри сверхпроводника.…”

Section: экспериментunclassified

Механизмы, определяющие гистерезис магнитосопротивления гранулярного ВТСП в присутствии парамагнитного вклада, на примере HoBa-=SUB=-2-=/SUB=-Cu-=SUB=-3-=/SUB=-O-=SUB=-7-delta-=/SUB=-

Семенов¹,

Gokhfeld²,

Терентьев³

et al. 2021

Физика Твердого Тела

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The hysteretic magnetoresistance of granular high-temperature superconductor (HTSC) HoBa2Cu3O7-δ is investigated. Superconductors of the YBCO family with magnetic rare earth elements (Nd, Ho, Er, Sm, Yb, Dy) in place of yttrium are characterized by a significant paramagnetic contribution to the total magnetization. Impact of this paramagnetic contribution on the magnetotransport properties is analyzed using the concept of an effective field in an intergranular medium. Lines of magnetic induction from paramagnetic moments do not concentrate in intergranular boundaries, and, thus, have an insignificant effect on magnetotransport properties of granular HTSC. At the same time, there are strong concentration of magnetic flux in the intergranular boundaries due to Meissner currents and Abrikosov vortices. This magnetic flux compression determines the magnetotransport properties of granular HTSCs, including YBCO with magnetic rare earth elements.

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Physical, electrical, transport and magnetic properties of Nd(Ba,Nd)2.1Cu3O7−δ system

Cited by 11 publications

References 52 publications

Use of a Sigmoid Function to Describe Second Peak in Magnetization Loops

Use of a Sigmoid Function to Describe Second Peak in Magnetization Loops

Synthesis and Physicochemical Properties of Nd‐, Sm‐, Eu‐Based Cuprate High‐Temperature Superconductors

Механизмы, определяющие гистерезис магнитосопротивления гранулярного ВТСП в присутствии парамагнитного вклада, на примере HoBa-=SUB=-2-=/SUB=-Cu-=SUB=-3-=/SUB=-O-=SUB=-7-delta-=/SUB=-

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