Variation of anomalous Pr ordering and crystal symmetry for the oxygenated<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Pr</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>+</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ba</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mr

Luo, H.; Lin, B. N.; Lin, Yi-Chung; Chiang, H. C.; Hsu, Y. Y.; Hsu, Tsun-Lai; Lee, T. J.; Ku, H. C.; Lin, Chih-Peng; Kao, H.-C.I.; Shi, Jen–Bin; Ho, J.C.; Chang, Chih‐Ju; Hwang, S. R.; Li, W.-H.

doi:10.1103/physrevb.61.14825

Cited by 25 publications

(8 citation statements)

References 40 publications

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“…8 Recently, arguments for the appearance of superconductivity in PrBa 2 Cu 3 O 7 have noted that few Pr ions are incorporated into the Ba sites. 9,10 Furthermore, T c was reported to increase for LaBa 2 Cu 3 O 7 when the sample sintered in an inert atmosphere in order to prevent La from occupying the Ba site.…”

Section: Department Of Physics and National Laboratory Of Solid Statementioning

confidence: 99%

Coexistence of superconductivity and antiferromagnetism in the La1−xPrxBa2Cu3O7 system

Luo

Ding

2001

Journal of Applied Physics

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Structural, magnetic, and calorimetric properties are reported for the La1−xPrxBa2Cu3O7 solid solution. The structure remains orthorhombic with lattice parameter increases from a=0.3872, b=0.3927, and c=1.1709 nm for PrBa2Cu3O7 to a=0.3903, b=0.3944, and c=1.1801 nm for LaBa2Cu3O7. Substitution of Pr for La depresses Tc from 90 to 52 K for La0.5Pr0.5Ba2Cu3O7, which was reported to be a nonsuperconductor. The Pr antiferromagnetic ordering temperature TN decreases monotonically from 18 K for PrBa2Cu3O7 to 6 K for La0.8Pr0.2Ba2Cu3O7. Thus there is a large range of coexistence of superconductivity and antiferromagnetism for 0.2⩽x⩽0.5. The superconductivity and anomalous Pr ordering will be discussed with the R1−xPrxBa2Cu3O7 systems (R=Y, Nd–Lu).

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Section: Department Of Physics and National Laboratory Of Solid Statementioning

confidence: 99%

Coexistence of superconductivity and antiferromagnetism in the La1−xPrxBa2Cu3O7 system

Luo

Ding

2001

Journal of Applied Physics

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“…From Table I we can observe that R P (R−pattern), R wp (R−w eighted pattern), R e (R− expected) and χ 2 = R wp /R e (goodness-of-fit) systematically increase with increasing x. However, as the R i factors are small, the results are reliable [26,27].…”

Section: Methodsmentioning

confidence: 71%

Analysis of fluctuation conductivity of polycrystalline Er1-xPr xBa2Cu3O7-δsuperconductors

et al. 2009

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In this work we report on conductivity fluctuation measurements in polycrystalline samples of the Er 1−x Pr x Ba 2 Cu3O 7−δ superconductor (x =0.00, 0.05 and 0.10). Samples were prepared by a standard solidstate reaction technique. The results were analyzed in terms of the temperature derivative of the resistivity and of the logarithmic temperature derivative of the conductivity that allowed the identification of power-law divergences of the conductivity. The results show that the transition proceeds in two stages: pairing and coherence transition. Also, our results, from the critical exponent analysis, show a two-peak splitting at pairing transition, indicating possibly a phase separation. On approaching the zero resistance state, our results show a power-law behavior that corresponds to a phase transition from paracoherent to a coherent state of the granular array.

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“…For the case of Pr@Ba [11] in Pr123, the lattice parameters a < b ≈ 3. Ha [14] has performed a similar comparative study of Nd, La and Pr@Ba in Y123 system with similar findings.…”

Section: Structural Propertiesmentioning

confidence: 97%

“…For the case of Pr@Ba in Pr123, the temperature dependence of molar magnetic suceptibility χ m (T) and χ m -1 (T) for insulating phase 0.2Pr@Ba can be well fitted by a Curie-Weiss law χ m (T) = χ 0 + C/(T-θ p ) with negative paramagnetic intercept θ p = -11.7 K and an effective magnetic moment µ eff = 2.86 µ B for Pr ion, if the small saturation Cu moment of ~0.3-0.5 µ B can be neglected [11]. µ eff variation in the range of 2.86 to 3.18 µ B /Pr indicates Pr 3+ nature.…”

Section: Magnetic 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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Variation of anomalous Pr ordering and crystal symmetry for the oxygenatedPr1+xBa2−x

Cited by 25 publications

References 40 publications

Coexistence of superconductivity and antiferromagnetism in the La1−xPrxBa2Cu3O7 system

Coexistence of superconductivity and antiferromagnetism in the La1−xPrxBa2Cu3O7 system

Analysis of fluctuation conductivity of polycrystalline Er1-xPr xBa2Cu3O7-δsuperconductors

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

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