The effect of Pr substituted in Eu1−xPrxBa2Cu3O7−δ and EuBa2−xPrxCu3O7−δ perovskites

Klencsár, Zoltán; Кузманн, Э.; Homonnay, Z.; Vértes, A.; Vad, K.; Bánkuti, J.; Rácz, T.; Bódog, M.; Kotsis, I.

doi:10.1016/s0921-4534(98)00300-1

Cited by 17 publications

(3 citation statements)

References 29 publications

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“…A comparison of these two systems shows that the suppression of superconductivity of Pr at Ba sites is stronger than that of Pr at Nd sites. Such a conclusion is also in agreement with the reports for Gd123, 20) Eu123, 14) Y123, 27) Nd123, and Sm123. 33) This important effect is due to the difference between the valences of Ba 2þ and Pr 3þ ions that leads to hole filling/localization.…”

Section: Resultssupporting

confidence: 92%

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Effect of Pr Doping on Transport Properties of Nd(Ba_2-xPr_x)Cu₃O_7+δ

Maleki¹,

Akhavan²

2005

jjap

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Solid-state-reacted polycrystalline Nd(Ba2-xPrx)Cu3O7+δ materials have been prepared and investigated using X-ray diffraction and resistivity measurements. Our results show that Nd(Ba2-xPrx)Cu3O7+δ is a superconductor when x<0.3. The Tc depression in superconductivity of Pr at Ba sites is due to both hole filling/localization and depairing effects. The normal state conductivity undergoes a dimensional crossover from two-dimensional to three-dimensional in the frame of the variable range hopping regime. The localization length of carriers shows that Pr doping localizes carriers in the normal state and causes the Tc depression. The magnetoresistance of the samples has been investigated within the thermally activated flux creep (TAFC) and Ambegaokar and Halperin (AH) phase slip models. The pinning energy and critical current density decrease with the applied magnetic field and Pr doping. A scaling relation as a power-law dependence of pinning energy on the magnetic field has been obtained. The derived pinning energy shows that Pr doping plays the role of a weak link.

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Section: Resultssupporting

confidence: 92%

“…Klencsar et al 14) have studied Eu(Ba 2Àx Pr x )Cu 3 O 7À compounds to evaluate the validity of the mis-substitution effect. They have concluded that in these compounds a Pr at a Ba site does not have as strong an effect on superconductivity as assumed by Blackstead and Dow in terms of mis-substitution.…”

Section: Introductionmentioning

confidence: 99%

Effect of Pr Doping on Transport Properties of Nd(Ba_2-xPr_x)Cu₃O_7+δ

Maleki¹,

Akhavan²

2005

jjap

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“…Many experiments have been carried out for Pr@Ba on samples of Pr123 [6, 9 -12], Y123 [13,14], Sm123 [12], Eu123 [15,16], Gd123 [17], and other rare earth elements R@Ba such as La and Eu@Ba in Pr123 [18], La@Ba in Y123 [14], or in Pr123 [4], Nd@Ba in Nd123 [13,19], Ho,Y and Ca@Pr in Pr123 [20], Ba@Pr in Pr123 [21,22]. Through these experiments different structural and valence modifications related to Pr are reported.…”

Section: Structural Propertiesmentioning

confidence: 99%

Ba@Pr or Pr@Ba in R123 HTSC – To be or not to be SC

Akhavan

2004

Physica Status Solidi (b)

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In spite of the vast amount of experimental and theoretical knowledge accumulated in HTSC, the nature of the interaction driving charge carriers to form Cooper pairs below T c is still unknown. To elucidate the controversial insulating/SC Pr123, the substitution of Pr at Ba site (Pr@Ba) with Ba at Pr site (Ba@Pr) in R123 is compared and reviewed. This might shed some light on the microscopic origin of HTSC.

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