<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="italic">T</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="italic">c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>degradation in cuprate superconductors from the resistivity of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">YBa</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:m

Lal, R. B.; Awana, V. P. S.; Pandey, Suchita; Yadav, Vikas; Varandani, Deepak; Narlikar, A. V.; Chhikara, Anjli; Gmelin, E.

doi:10.1103/physrevb.51.539

Cited by 10 publications

(4 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mystery of Ni and Zn substitution at Cusite in RE:124 system is still open, despite some trials. 69 It is worth mentioning that results of most of the leading laboratories on 3d metal substitution in HTSc compounds, namely for RE:123 25,58-60 RE:124, 69,70 RE:247, 70,71 La:214, 59-61 and Nd:214, 67,68 in general agree with each other, in terms of their solubility limits, structural details, and T c depression rates with some of other physical properties. In a recent analysis den Hertog and Das have shown that Zn doping in cuprates induces a magnetic moment near the impurity site.…”

Section: Introductionmentioning

confidence: 56%

“…[63][64][65] Understanding of 3d metals substitutions at Cu-site in HTSc compounds was further complicated by the measurements on doped Nd:214 and RE:124 systems. [66][67][68][69] In these compounds, dopings with Ni and Zn have shown similar T c depression rates with an increase in their doping concentration in the pristine system. The results of Nd:214 were interpreted on the basis of larger coherence length of this compound in ab-plane (90Å), than for RE:123 and La:214 compounds.…”

Section: Introductionmentioning

confidence: 95%

See 1 more Smart Citation

PHYSICAL CHARACTERIZATION OF PURE AND SUBSTITUTED TETRAGONAL LaBaCaCu₃O_7-δ SUPERCONDUCTOR

Awana

Narlikar

2001

Mod. Phys. Lett. B

Self Cite

View full text Add to dashboard Cite

The high Tc superconductor, forming the focus of the present review, presents an interesting situation where, despite its oxygen content close to 7.0, the system prefers to crystallize in tetragonal structure, as distinct from exhaustively studied orthorhombic RE:123 (REBa 2 Cu 3 O 7 , RE = rare earth) compounds. Its optimum Tc is decided by the cation intermixing at various sites, unlike that in case of normal RE:123, where all cationic sites are fully occupied and fixed, leaving the anionic sites free for oxygen filling. In this, we review the rich crystal chemistry of this compound and discuss it in conjunction with its unusual superconducting properties. The article is divided in five parts: (1) first we discuss variously reported interesting finer structural details and superconductivity of pristine LaBaCaCu 3 O 7−δ (La:1113) superconductor. The La, Ba and Ca sites are found to be intermixed with respect to their nominal sites of the standard RE:123 structure. (2) We examine the structural aspects and superconductivity of La 1−x RExBaCaCu 3 O 7 (RE = Nd, Dy, Sm and Pr). Unlike RE:123 and 124 compounds, the RE:1113 compounds form only with light rare earths such as La, Pr and Nd. Pr:1113 compound is found to be an insulator with Pr moments ordering magnetically at around 8 K, unlike at 17 K for Pr:123. (3) Studies of Pr substitution reveal that relative Tc depression due to Pr in the (La,Nd) 1−x PrxBaCaCu 3 O 7 system is less in comparison to that found for La or Nd site Pr substituted (La,Nd) 1−x PrxBa 2 Cu 3 O 7 . (4) The results of superconductivity and structural details are reviewed for LaBaCaCu 3−x MxO 7 (M = Fe, Co, Ni, Ga and Zn) and finally (5) we summarize our conclusions. The results in terms of Tc depression due to these impurities in the parent La:1113 system are seen as similar to those observed for RE:124 (REBa 2 Cu 4 O 8 ) and Nd:214 (Nd 2−x CexCuO 4 ), but are different from RE:123 and La:214. The results of structural details, superconductivity and magnetic ordering presented in the four parts for La 1−x RExBaCaCu 3−y MyO 7 (RE = Nd, Dy, Sm, Pr with 1.0 ≥ x ≥ 0.0, and M = Fe, Co, Ni, Ga and Zn with 0.24 ≥ y ≥ 0.0 were obtained from X-ray and neutron diffraction and using AC and DC magnetic susceptibility, electrical resitivity and heat capacity data as a function of * 415 Mod. Phys. Lett. B 2001.15:415-453. Downloaded from www.worldscientific.com by UNIVERSITY OF MICHIGAN on 02/02/15. For personal use only.

show abstract

Section: Introductionmentioning

confidence: 56%

Section: Introductionmentioning

confidence: 95%

PHYSICAL CHARACTERIZATION OF PURE AND SUBSTITUTED TETRAGONAL LaBaCaCu₃O_7-δ SUPERCONDUCTOR

Awana

Narlikar

2001

Mod. Phys. Lett. B

Self Cite

View full text Add to dashboard Cite

show abstract

“…From Eqs. (39) and ( 40) one can see that 1/τ ef f,c increases monotonically with 1/τ n , 1/τ pot m , and 1/τ ex m at any value of χ, with the exception of the case χ = 0, where 1/τ ef f,c doesn't depend on 1/τ n and 1/τ pot m , see Eq. ( 40).…”

Section: Critical Temperature Of Impure Anisotropic Superconductormentioning

confidence: 89%

“…Numerous experimental studies give evidence for T c degradation by impurity doping [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] or radiation damage [49][50][51][52][53][54][55][56][57][58] of HTSCs, the two effects being remarkably analogous if the dependence of T c on the in-plane residual resistivity ρ 0 is considered [59]. Impurity-induced scattering of charge carriers in doped HTSCs and their scattering by displaced host atoms in irradiated HTSCs are believed to be the main reasons for the suppression of superconductivity and the increase in ρ 0 [35,36,44,45,51,52,54,55].…”

Section: Introductionmentioning

confidence: 99%

Critical temperature of an anisotropic superconductor containing both nonmagnetic and magnetic impurities

Openov¹

1998

Phys. Rev. B

View full text Add to dashboard Cite

The combined effect of both nonmagnetic and magnetic impurities on the superconducting transition temperature is studied theoretically within the BCS model. An expression for the critical temperature as a function of potential and spin-flip scattering rates is derived for a two-dimensional superconductor with arbitrary in-plane anisotropy of the superconducting order parameter, ranging from isotropic s-wave to d-wave (or any pairing state with nonzero angular momentum) and including anisotropic s-wave and mixed (d + s)-wave as particular cases. This expression generalizes the well-known Abrikosov-Gor'kov formula for the critical temperature of impure superconductors. The effect of defects and impurities in high temperature superconductors is discussed.

show abstract

Anisotropics-wave ord-wave pairing? Analysis of experiments on ion irradiation of YBa2Cu3O7-x films

et al. 1996

View full text Add to dashboard Cite

Tcdegradation in cuprate superconductors from the resistivity ofYBa2

Cited by 10 publications

References 26 publications

PHYSICAL CHARACTERIZATION OF PURE AND SUBSTITUTED TETRAGONAL LaBaCaCu₃O_7-δ SUPERCONDUCTOR

PHYSICAL CHARACTERIZATION OF PURE AND SUBSTITUTED TETRAGONAL LaBaCaCu₃O_7-δ SUPERCONDUCTOR

Critical temperature of an anisotropic superconductor containing both nonmagnetic and magnetic impurities

Anisotropics-wave ord-wave pairing? Analysis of experiments on ion irradiation of YBa2Cu3O7-x films

Contact Info

Product

Resources

About

Tcdegradation in cuprate superconductors from the resistivity ofYBa2

Cited by 10 publications

References 26 publications

PHYSICAL CHARACTERIZATION OF PURE AND SUBSTITUTED TETRAGONAL LaBaCaCu3O7-δ SUPERCONDUCTOR

PHYSICAL CHARACTERIZATION OF PURE AND SUBSTITUTED TETRAGONAL LaBaCaCu3O7-δ SUPERCONDUCTOR

Critical temperature of an anisotropic superconductor containing both nonmagnetic and magnetic impurities

Anisotropics-wave ord-wave pairing? Analysis of experiments on ion irradiation of YBa2Cu3O7-x films

Contact Info

Product

Resources

About

PHYSICAL CHARACTERIZATION OF PURE AND SUBSTITUTED TETRAGONAL LaBaCaCu₃O_7-δ SUPERCONDUCTOR

PHYSICAL CHARACTERIZATION OF PURE AND SUBSTITUTED TETRAGONAL LaBaCaCu₃O_7-δ SUPERCONDUCTOR