Superconducting, magnetic, electronic transport, and structural properties of (R1.5Ce0.5)Sr2Cu2NbO10, R=Pr, Nd, Sm, Eu

Goodwin, T.J.; Radousky, H. B.; Shelton, R. N.

doi:10.1016/0921-4534(92)90592-z

Cited by 57 publications

(39 citation statements)

References 14 publications

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“…The contraction of the c lattice parameters and corresponding behavior of the » 's for the (R \V Pr V Ce ) SCNO, R"Nd, Sm, Eu, series of compounds are unexpected given recent structural, magnetic, specific heat, and EELS measurements which independently indicate that the Pr ion is trivalent with a H 4f ground state in these compounds (8,15,16,22,34). One might have expected that the » 's of these compounds would scale with the mean ionic radii of the rare earth site in these compounds at a larger Pr> ion is doped in for the smaller Sm> and Eu> ion.…”

Section: Discussionmentioning

confidence: 89%

“…Pr has been found to inhibit superconductivity in these compounds in conjunction with an unexpected insulating electronic state, anomalous Pr magnetism, and a pseudotriplet Pr 4f crystal field ground state while all other members of the (R Ce )SCNO structure are metallic and superconducting (8,15,16). Examination of the magnetic and electronic properties of the (R \V Pr V Ce )SCNO, R"Nd, Sm, Eu, series of compounds indicate that Pr suppresses superconductivity in the (R Ce )SCNO structure in the same manner as in the RBCO structure (16,17,22).…”

Section: Introductionmentioning

confidence: 98%

“…Since then, the (R Ce )SCNO structure has been reported to form for R"Pr, Nd, Sm, Eu, and Gd, and the isostructural Ta analogs, (R Ce )Sr Cu TaO \B [(R Ce )SCTO], have been reported to form for R"Pr, Nd, Sm, and Eu (7)(8)(9)(10)(11)(12). With the exception of the R"Pr compounds, all of these materials exhibit bulk superconductivity below &28 K (7)(8)(9)(10)(11)(12).…”

Section: Introductionmentioning

confidence: 98%

“…cuprates. We have undertaken an extensive study of the effects of the Pr ion on the properties of the (R Ce )SCNO family of compounds (8,15,16,22). In this paper we report on our investigations of the phase purity, structural parameters, and oxygen stoichiometry of (Pr Ce )SCTO and the (R \V Pr V Ce )SCNO system for R"Nd, Sm, Eu, using X-ray diffraction (XRD), Rietveld refinements of the XRD data, and thermogravimetric analysis (TGA).…”

Section: Introductionmentioning

confidence: 99%

“…More recently, these compounds have attracted attention due to the unusual magnetic and electronic properties of (Pr Ce )SCNO and (Pr Ce )SCTO (8,(14)(15)(16). Pr has been found to inhibit superconductivity in these compounds in conjunction with an unexpected insulating electronic state, anomalous Pr magnetism, and a pseudotriplet Pr 4f crystal field ground state while all other members of the (R Ce )SCNO structure are metallic and superconducting (8,15,16).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Structural Properties and Oxygen Stoichiometry of (Pr1.5Ce0.5)Sr2Cu2TaO10−δand (R1.5−xPrxCe0.5)Sr2Cu2NbO10−δ,R=Nd, Sm, Eu: Correlations with Electronic and Magnetic Properties

Goodwin

Radousky

Shelton

1997

Journal of Solid State Chemistry

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Section: Discussionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Structural Properties and Oxygen Stoichiometry of (Pr1.5Ce0.5)Sr2Cu2TaO10−δand (R1.5−xPrxCe0.5)Sr2Cu2NbO10−δ,R=Nd, Sm, Eu: Correlations with Electronic and Magnetic Properties

Goodwin

Radousky

Shelton

1997

Journal of Solid State Chemistry

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Raman and magnetic susceptibility evidence for a structural transition in (Eu1.5−xPrxCe0.5)Sr2Cu2NbO10 compounds

Bennahmias

Radousky

Lorenzana

et al. 1999

J. Raman Spectrosc.

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Understanding the unique role that Pr hybridization plays in promoting both the suppression of superconductivity and the onset of complex magnetism in high-T C cuprates continues to be a dynamic area of research. Complex magnetic behavior is well known to occur in the (Pr 1.5 Ce 0.5 )Sr 2 Cu 2 MO 10 (M = Nb or Ta) compounds. Previously, two temperature-dependent transitions have been identified through magnetic susceptibility studies for the series of solid solutions (Eu 1.5−x Pr x Ce 0.5 )Sr 2 Cu 2 NbO 10 (0.0 Ä x Ä 1.5). In this paper, we present new measurements of the Raman-active modes and the magnetic susceptibility for these latter compounds. The data indicate a discontinuity in concentration space at a Pr doping level of x = 1.0, that we interpret as the signature of a subtle phase transition.

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Anomalous Pr Ordering for Pr 1222- and 2222-Type Structure Compounds

Luo

Ding

2001

phys. stat. sol. (a)

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Subject classification: 74.25.Ha; 74.72.Jt; S10.15 Magnetic properties of the 1222-type structure compounds (Pb,M)(Sr,Pr) 2 (Pr,Ce) 2 Cu 2 O 9 (M ¼ Cu and Cd) and the 2222-type compound Bi 2 Sr 2 (Pr,Ce) 2 Cu 2 O 10 are reported. The magnetic susceptibility measurements reveal that Pr 3þ moments are ordered antiferromagnetically around T N (Pr) of 15-18 K for (Pb 0.5 M 0.5 )(Sr 0.9 Pr 0.1 ) 2 (Pr 0.7 Ce 0.3 ) 2 Cu 2 O 9 (M ¼ Cu and Cd), and at 22-24 K for Bi 2 Sr 2 (Pr 0.82 Ce 0.18 ) 2 Cu 2 O 10 . Except T N (Pr), there is no other anomalous peak appearing in the susceptibility curve, which is different from the other reported 1222 MSr 2 PrCu 2 O 10 (M ¼ Nb, Ta, Ga, In) systems. In the range of above T N (Pr) to room temperature, the susceptibility curve can be well fitted by a Curie-Weiss law with an effective magnetic moment m eff of 3.12, 2.79 and 3.09 m B per Pr ion for (Pb 0.5 Cu 0.5 )(Sr 0.9 Pr 0.1 ) 2 (Pr 0.7 Ce 0.3 ) 2 Cu 2 O 9 , (Pb 0.5 Cd 0.5 )(Sr 0.9 Pr 0.1 ) 2 (Pr 0.7 Ce 0.3 ) 2 Cu 2 O 9 and Bi 2 Sr 2 (Pr 0.82 Ce 0.18 ) 2 Cu 2 O 10 , respectively. The anomalous Pr magnetism and the suppression of superconductivity by Pr in the above compounds are discussed with the related Pr-containing 1212, 2212, 3212 and 214 compounds.

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Superconducting, magnetic, electronic transport, and structural properties of (R1.5Ce0.5)Sr2Cu2NbO10, R=Pr, Nd, Sm, Eu

Cited by 57 publications

References 14 publications

Structural Properties and Oxygen Stoichiometry of (Pr1.5Ce0.5)Sr2Cu2TaO10−δand (R1.5−xPrxCe0.5)Sr2Cu2NbO10−δ,R=Nd, Sm, Eu: Correlations with Electronic and Magnetic Properties

Structural Properties and Oxygen Stoichiometry of (Pr1.5Ce0.5)Sr2Cu2TaO10−δand (R1.5−xPrxCe0.5)Sr2Cu2NbO10−δ,R=Nd, Sm, Eu: Correlations with Electronic and Magnetic Properties

Raman and magnetic susceptibility evidence for a structural transition in (Eu1.5−xPrxCe0.5)Sr2Cu2NbO10 compounds

Anomalous Pr Ordering for Pr 1222- and 2222-Type Structure Compounds

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