Paramagnetism and Superconductivity in Eu0.7Sm0.3Ba2Cu3O7??

Sandu, V.; Popa, S.; Gioacchino, D. Di; Tripodi, P.

doi:10.1007/s10948-004-0830-8

Cited by 7 publications

(10 citation statements)

References 23 publications

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“…Fig. 4 Magnetization curve measured by Sandu et al [27] on a Eu 0.7 Sm 0.3 Ba 2 Cu 3 O 7−δ at 65 K. The dotted line represents equilibrium magnetization M eq calculated by Eq. ( 3) in that reference.…”

Section: Comparisons With Experimental Resultsmentioning

confidence: 98%

“…The parameters are: p = J c0 D/H 0 = 0.2, χ = 0.075. (ii) Coexistence of superconductivity and paramagnetism with Meissner diamagnetism: observations of Sandu et al [27] [27]). The irreversible magnetization chances sign (negative to positive) at the certain value of the increasing magnetic field after ZFC and recovers the negative values for the reverse cycle.…”

Section: Comparisons With Experimental Resultsmentioning

confidence: 99%

“…We have adopted the generalized Kim's critical state model [3,4] to fit experimental data. [27] In this model, J c (B) is given by…”

Section: Comparisons With Experimental Resultsmentioning

confidence: 99%

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An Extended Model for Coexistence of Superconductivity and Paramagnetism in High-T _c Superconductors

İnanır¹

2008

Commun. Theor. Phys.

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Section: Comparisons With Experimental Resultsmentioning

confidence: 98%

Section: Comparisons With Experimental Resultsmentioning

confidence: 99%

See 1 more Smart Citation

An Extended Model for Coexistence of Superconductivity and Paramagnetism in High-T _c Superconductors

İnanır¹

2008

Commun. Theor. Phys.

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“…To perform analysis on flux pinning dominant processes in single crystals present in the sample we use the analysis of the higher harmonic (III Harmonic) behaviour of the multi-harmonic ac susceptibility in function of temperature and magnetic field. In fact, the high harmonic components ac detect only the non-linear components in the signal, separate and amplify the signals due to different superconducting phases present in the sample [41][42][43][44][48][49][50][51], even when there are small amount of superconducting phases or evanescent superconducting phases are present [52,53]. The latter are connected to changes of the effective flux-diffusivity tuned by the flux-pinning interaction [39,40].…”

Section: Methodsmentioning

confidence: 99%

Effect of spacer layer on flux-pinning properties of iron-based superconductors

Gioacchino¹,

Poccia²,

Marcelli³

et al. 2016

Novel Superconducting Materials

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Abstract:We investigated the magnetic flux-pinning in iron-based 1111-type (REFeAsO, RE= rare earth) and 11-type (FeSe 1−x Tex) superconductors by third harmonic acmagnetic susceptibility measurements, a technique sensitive to the dynamics of magnetization, probing non-linear processes in flux pinning transport. Despite the larger thermal fluctuations due to the high critical temperature and large anisotropy, flux dynamics of 1111-type pnictides points out a more efficient pinning mechanism than the one in the 11-type chalcogenides. We have associated the stronger pinning in the 1111-family to the presence of REO (RE=rare earth) spacer layers separating the active FeAslayers unlike the 11-chalcogenides in which no spacer layers are present. Therefore, the disorder in the FeAs layers induced by the misfit strain due to spacer layers has an important role in the enhanced flux pinning of 1111-type superconductors.

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“…[33] Hussey [3] Cooper [4] twinned crystal Babic [5] Semba [6] Sandu [7] Lavrov [8] Zverev [9] Terasaki [10] Yan [11] Nyhus [12] Ca 0.5 La Komiya [15] Nakamura [16] Hussey [17] Marin [18] La Fujiwara [32] Watanabe [33] Giura [34] Yan [ Fujii [35] Liang [36] (Bi Terasaki [38] 0.0 0.5 1.0 1.5…”

Section: Table Captionmentioning

confidence: 99%

Universal scaling of the -axis dc conductivity for underdoped high-temperature cuprate superconductors

Honma

Hor

2010

Solid State Communications

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Coexistence of the "metallic-like" in-plane and the "semiconducting-like" out-of-plane (caxis) dc conductivities (σ c ), generating a huge anisotropy in the underdoped hightemperature cuprate superconductors (HTCS), defies our current understanding of metal. In this report we present an intrinsic doping dependence of σ c . We find that the σ c for the underdoped HTCS is universally scaled to the σ c at the optimal doped-hole concentration.The universal scaling behavior suggests that there are three intrinsic processes contribute to σ c : (i) the doping-dependent-activated gap; (ii) the exponential doping dependences and (iii) the tunneling between adjacent CuO 2 block layers. They are the essential underlying characteristics of the c-axis transport for all HTCSs. *Manuscript Click here to view linked References IntroductionPlanar doped-hole concentration (P pl ) is one of the most important physical parameters that dictate both normal and superconducting properties of high-temperature cuprate superconductors (HTCS). In order to systematically compare the doping dependence of various in-plane properties among different HTCSs, we have constructed the hole-scale based on the universal relation between the in-plane thermoelectric power at 290 K (S 290 ) and P pl [1]. The hole-scale is derived from, therefore consistent with, the relation between S 290 and P pl of single-layer La 2-x Sr x CuO 4 (P pl = x) and double-layer Y 1-x Ca x Ba 2 Cu 3 O 6 (P pl = x/2). Until now, although there have been many temperature (T)-dependent studies of c-axis dc conductivity (σ c ) , there are few qualitatively doping-dependent studies of σ c for many different HTCSs [39,40]. In the T-dependent studies one has to deal with many Tdependent factors involving possible changes of electronic band structure, of scattering rate and structural phase transitions. On the other hand, the doping-dependent studies have the distinct advantages of directly studying the evolution of the electronic states upon holedoping without the complications due to the variation of T. Doping induced properties that are generic to all materials will be the real intrinsic properties of HTCS which warrant serious considerations.In this paper, we have analyzed σ c of 19 hole-doped HTCSs from 37 published papers . We found that the doping dependence of σ c for HTCSs is well scaled by P pl opt ,where the HTCS material has the highest T c , and σ c opt , which is the conductivity at P pl opt .The universal scaling behavior suggests that the intrinsic contributions of the dopingdependent-activated gap, the exponential doping dependences and the tunneling between adjacent CuO 2 block layers are essential and underlying the c-axis transport for all HTCSs. Analysis methodBased on the hole-scale proposed in [1], we use two methods to extract the doped-hole concentration from the published data: P pl is determined from the value of S 290 by using the formula reported in [1] and, as the first and preferred method, P pl so determined is most reliable. Using first method we fou...

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Paramagnetism and Superconductivity in Eu0.7Sm0.3Ba2Cu3O7??

Cited by 7 publications

References 23 publications

An Extended Model for Coexistence of Superconductivity and Paramagnetism in High-T _c Superconductors

An Extended Model for Coexistence of Superconductivity and Paramagnetism in High-T _c Superconductors

Effect of spacer layer on flux-pinning properties of iron-based superconductors

Universal scaling of the -axis dc conductivity for underdoped high-temperature cuprate superconductors

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Paramagnetism and Superconductivity in Eu0.7Sm0.3Ba2Cu3O7??

Cited by 7 publications

References 23 publications

An Extended Model for Coexistence of Superconductivity and Paramagnetism in High-T c Superconductors

An Extended Model for Coexistence of Superconductivity and Paramagnetism in High-T c Superconductors

Effect of spacer layer on flux-pinning properties of iron-based superconductors

Universal scaling of the -axis dc conductivity for underdoped high-temperature cuprate superconductors

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An Extended Model for Coexistence of Superconductivity and Paramagnetism in High-T _c Superconductors

An Extended Model for Coexistence of Superconductivity and Paramagnetism in High-T _c Superconductors