Negative charge carriers in the 90 K plateau of REBa2Cu3O7−δ

Plackowski, T.; Wlosewicz, D.; Sulkowski, C.; Rogacki, K.

doi:10.1016/0921-4534(95)00055-0

Cited by 10 publications

(1 citation statement)

References 24 publications

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“…We have plotted C P /T instead of C P in the vicinity of the transition temperature because the jumps are best seen in such plots. For pure EuBa 2 Cu 3 O 7−δ , the observed jump C P is about 2.1 J mol −1 K −1 , which is in good agreement with that observed by Plackowski et al [24]. With a small amount of Mn doping (0.5%), a nearly twofold decrease in the jump with C P ≈ 1.2 J mol −1 K −1 is observed.…”

Section: Specific Heatsupporting

confidence: 91%

Electrical and thermal transport properties of EuBa₂(Cu_1−xMn_x)₃O_7−δ

Rao¹,

Chakraborty²,

Gahtori³

et al. 2008

J. Phys.: Condens. Matter

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In this communication, we present the measurements of electrical resistivity (ρ), thermal conductivity (κ), thermopower (S), and specific heat (C P ) on Mn doped compounds EuBa 2 (Cu 1−x Mn x ) 3 O 7−δ for 0 x 0.02. The transition temperature T C and the upper critical field H C2 (0) in this series of compounds are found to decrease quasi-linearly as the Mn concentration increases. All the currently investigated samples show a hump in thermal conductivity below their transition temperatures. Thermopower measurements exhibit an electron-like behaviour for pure samples; however, a hole-like behaviour is seen in all the doped samples. A small jump in specific heat is observed in the pure samples. It is seen that replacing 0.5% Cu by Mn has little effect on the transition temperature, but there is a nearly twofold suppression in the C P jump for this sample. These results demonstrate that the impurities are being incorporated as a whole and not as a cluster.

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Section: Specific Heatsupporting

confidence: 91%