Superconductivity, magnetic fluctuations, and magnetic order in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">TbSr</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>2.69</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Mo</mml:mi></mml:mrow><mml

Li, W.-H.; Chuang, Wan-Chen; Wu, Sheng Yun; Lee, K. C.; Lynn, J. W.; Tsay, H. L.; Yang, H. D.

doi:10.1103/physrevb.56.5631

Cited by 12 publications

(7 citation statements)

References 20 publications

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“…This is because larger screening currents are required to shield the applied field. Therefore, the T p of χ " shifts to lower temperature according to the critical-state model [25]. Moreover, the peak height of χ " increases as the field amplitude increases like YBCO [26].…”

Section: Resultsmentioning

confidence: 99%

Field-dependent Behavior of AC Susceptibility in [Y 0.8 Ca 0.2](Ba 0.5 Sr 0.5)2 Cu 3 O 7−δ

Lee

Seo

Valladares

et al. 2015

J Supercond Nov Magn

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The AC susceptibility of [Y 0.8 Ca 0.2 ](Ba 0.5 Sr 0.5 ) 2 Cu 3 O 7−δ was investigated as a function of frequency and amplitude of AC magnetic field. The susceptibilities of the sample display the field amplitude dependence. The peak temperature (T p ) of its imaginary part shows not frequency dependence but field amplitude dependence. The frequency effect on AC susceptibility was negligible. As the field amplitude increases, T p shifts to lower temperature.

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Section: Resultsmentioning

confidence: 99%

Field-dependent Behavior of AC Susceptibility in [Y 0.8 Ca 0.2](Ba 0.5 Sr 0.5)2 Cu 3 O 7−δ

Lee

Seo

Valladares

et al. 2015

J Supercond Nov Magn

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“…The fourth characteristic temperature T N (7 K) is the antiferromagnetic ordering temperature of Tb moments [1,[6][7][8][9] Interestingly T N of Tb in Tb-123 remains unchanged irrespective of whether the compound is non-superconductiing or superconducting at elevated temperatures of 30 or 80 K. Hence out of the four characteristic temperatures seen in DC susceptibility though the origin of T c , T irr and T N is well understood, the origin of T K (35 K) needs to be debated. Interestingly T K appears only for HP LT-oxy TbSr 2 Cu 2.7 Mo 0.3 O 7+δ , and is not seen for 100-atm O 2 annealed or for the as synthesized compound [1].…”

Section: Resultsmentioning

confidence: 99%

“…To overcome this situation, Sr is used in place of Ba and subsequently to stabilize the structure, approximately 30 % of the Cu atoms in CuO chains is replaced by Mo. This resulted in the composition of TbSr 2 Cu 2.7 Mo 0.3 O 7+δ , which not only crystallizes in ideal Tb-123 or (Cu,Mo)-1 (Sr) 2 (Tb) 12 structure, but also shows superconducting transition temperature T c of up to 37 K [6][7][8][9]. What we reported earlier [1], is the enhancement of the T c of the TbSr 2 Cu 2.7 Mo 0.3 O 7+δ phase from 37 K to ∼80 K by a HPLT-oxy process (5 GPa, 400 0 C) using AgO as an excess-oxygen source.…”

Section: Introductionmentioning

confidence: 99%

Micro-structure and magnetization of the 80-K superconductor, TbSr2Cu2.7Mo0.3O7+δ

Awana

Gupta

Kishan

et al. 2004

Physica C: Superconductivity

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The results of micro-structural and detailed magnetization studies are reported here for our recently published TbSr 2 Cu 2.7 Mo 0.3 O 7+δ superconductor with a transition temperature (T c ) at as high as 80 K [1]. From XRD and EDX the sample was confirmed to be of single-phase and possess the nominal cation stoichiometry. The SEM images showed well-developed grains for this ceramic high-T c superconductor. Magnetization measurements at various temperatures and fields revealed bulk superconductivity below 80 K. Magnetization versus applied field (M vs. H) loops at various temperatures below the T c exhibited clear full penetration field H P . In normal state (> 100 K) the susceptibility follows the Curie-Weiss behavio r with an effective paramagnetic moment of 9.83 µ B .

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“…There are four exceptions to this case: RE = Pm, Pr, Tb and Ce. No investigation has been reported for the Pm123 compound because the Pm nucleus is radioactive and unstable [1]. The Pr123 compound is the only one which is isostructural with Gd123 but is not a superconductor [2].…”

Section: Introductionmentioning

confidence: 99%

“…The role of Pr substitution in the high temperature superconductors (HTSC) has been reviewed by Akhavan [4], and consideration of the Pr substitution for Gd and Ba in Gd123 has been extended in [5][6][7]. 1 Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional mechanism of electrical conductivity in Gd_1−xCe_xBa₂Cu₃O_7−δ

Mofakham

Mazaheri

Akhavan³

2008

J. Phys.: Condens. Matter

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Partial substitutions of Pr and Ce are known to suppress the superconducting state in REBa 2 Cu 3 O 7−δ systems. We have substituted Ce for Gd in Gd 1−x Ce x Ba 2 Cu 3 O 7−δ compounds with x = 0.0-0.6 by the standard solid-state reaction technique. X-ray diffraction (XRD) experiments are performed and their results are refined by the Rietveld method. XRD analysis shows a predominantly single-phase perovskite structure with few impurity phases. Our resistivity results show that, by increasing the Ce content, T c decreases, the transition temperature width increases, and in the normal state a metal-insulator transition (MIT) occurs at x c = 0.12. The normal state resistivity of the samples and their slopes change at this point. The normal state resistivity of the samples is fitted with the variable range hopping (VRH) and the Coulomb gap (CG). Our results are most consistent with the two-dimensional VRH model.

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Superconductivity, magnetic fluctuations, and magnetic order inTbSr2Cu2.69Mo

Cited by 12 publications

References 20 publications

Field-dependent Behavior of AC Susceptibility in [Y 0.8 Ca 0.2](Ba 0.5 Sr 0.5)2 Cu 3 O 7−δ

Field-dependent Behavior of AC Susceptibility in [Y 0.8 Ca 0.2](Ba 0.5 Sr 0.5)2 Cu 3 O 7−δ

Micro-structure and magnetization of the 80-K superconductor, TbSr2Cu2.7Mo0.3O7+δ

Two-dimensional mechanism of electrical conductivity in Gd_1−xCe_xBa₂Cu₃O_7−δ

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Superconductivity, magnetic fluctuations, and magnetic order inTbSr2Cu2.69Mo

Cited by 12 publications

References 20 publications

Field-dependent Behavior of AC Susceptibility in [Y 0.8 Ca 0.2](Ba 0.5 Sr 0.5)2 Cu 3 O 7−δ

Field-dependent Behavior of AC Susceptibility in [Y 0.8 Ca 0.2](Ba 0.5 Sr 0.5)2 Cu 3 O 7−δ

Micro-structure and magnetization of the 80-K superconductor, TbSr2Cu2.7Mo0.3O7+δ

Two-dimensional mechanism of electrical conductivity in Gd1−xCexBa2Cu3O7−δ

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Product

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Two-dimensional mechanism of electrical conductivity in Gd_1−xCe_xBa₂Cu₃O_7−δ