Specific heat of superconducting YBaCuOAg nonrandom composite

Ghivelder, L.; Rodrigues, Pedro; Pureur, P.; Souza, Jonathan Henrique de; Reich, S.

doi:10.1016/0921-4534(92)90676-4

Cited by 10 publications

(5 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These are the same samples formerly studied for their electrical [8] and magnetic properties [9,10]. The specific heat of the pure sample and of the 23 wt% Ag composite were also previously reported [7]. Our results, combined with estimations of the bulk modulus from data available in the literature [11], allow the determination of the Grüneisen parameters in the temperature interval between 40 K and 120 K.…”

Section: Introductionsupporting

confidence: 72%

“…The value of T c remains approximately unchanged, but the specific heat jump, C/T c , becomes smaller as the silver concentration is increased. For the sample with 23% Ag, although the specific jump is not seen in the data of figure 4, the anomaly appears in the temperature derivative, dC/dT (see [7]).…”

Section: Resultsmentioning

confidence: 94%

“…The non-random YBCO/Ag composites have been characterized by a number of different techniques, including resistivity [4], critical current [4], chemical stability [5] and current-voltage curves [6]. Characterization with xray diffraction and scanning electron microscopy has also been done [7]. Recently, systematic work devoted to study these samples from a more fundamental point of view has been developed.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, systematic work devoted to study these samples from a more fundamental point of view has been developed. It includes specific heat [7], fluctuation conductivity [8], a.c. susceptibility [9] and magnetization [10] measurements.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Thermal expansion and specific heat of non-random YBCO/Ag composites

Haetinger

Castillo

Kunzler

et al. 1996

Supercond. Sci. Technol.

View full text Add to dashboard Cite

We report on low-temperature thermal expansion and specific heat measurements in a series of non-random composites YBCO/Ag x wt% (x = 0, 6, 11 and 23). A reference YBCO polycrystalline sample is also investigated. At the lowest temperatures, the expansivities and specific heat are analysed as sums of a extrinsic T -linear term and a T 3 -Debye contribution. The Gr üneisen parameters are determined and shown to be almost constant for T ≥ 60 K. The values of the Gr üneisen parameters increase with the silver content in the composites.

show abstract

Section: Introductionsupporting

confidence: 72%

Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermal expansion and specific heat of non-random YBCO/Ag composites

Haetinger

Castillo

Kunzler

et al. 1996

Supercond. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Various methods have been employed to prepare superconducting composites, but attention is focused on particulate composites [6][7][8][9], e.g. the addition of Ag 2 O powder to HTSC [10,11]. In addition to their technological relevance, these composites are interesting as model systems representing truly granular superconductors at the length scale of the crystallites, where the weak links are metallic in nature.…”

Section: Introductionmentioning

confidence: 99%

Effect of high pressure on the electrical resistivity behaviour of (Pb_0.5,Cd_0.5)Sr₂(Y_1-x,Ca_x)-Cu₂O_7-δ/Ag₂O superconducting composites

Latha

Subbaraman

Natarajan

et al. 2000

Supercond. Sci. Technol.

View full text Add to dashboard Cite

The effect of high pressure on the electrical resistivity behaviour of (Pb 0.5 , Cd 0.5 )Sr 2 (Y 1−x , Ca x )Cu 2 O 7−δ (x = 0.3, 0.4 and 0.5) superconductor with, and without, 10 mol% Ag 2 O addition has been studied. At room temperature, there was an initial drop in the resistivity of the pure superconductor up to 2 GPa, followed by a nearly constant value up to 8 GPa pressure. The steady value of resistivity observed between 2 and 8 GPa decreased with increasing calcium content. The superconducting composite formed with the addition of 10 mol% Ag 2 O to the (Pb, Cd)-1212 phase (x = 0.3) exhibited a metallic nature under pressure up to 8 GPa, but the high-pressure resistivity behaviour of the superconducting composites with x = 0.4 and 0.5 was found to be semiconducting.

show abstract