GALVANOMAGNETIC EFFECTS AND ELECTRONIC SPECIFIC HEAT OF BULK La2-xBaxCu1-yZnyO4+d

Autor:	V. Toma, Aurel Pop, E. Macocian, M. Ilonca, T. Jurcut, Rares Stiufiuc, Gheorghe Ilonca
Rok vydání:	2002
Předmět:	Superconductivity Materials science Condensed matter physics Electrical resistivity and conductivity Hall effect Phonon Seebeck coefficient Statistical and Nonlinear Physics Singlet state Atmospheric temperature range Condensed Matter Physics Magnetic field
Zdroj:	International Journal of Modern Physics B. 16:3587-3594
ISSN:	1793-6578 0217-9792
DOI:	10.1142/s0217979202012177
Popis:	The samples of bulk La 2-x Ba x Cu 1-y Zn y O 4+d were prepared by conventional solid state reaction method and have been investigated using electrical resistivity, Seebeck coefficient, Hall coefficient and electronic specific heat measurements over the temperature range between 4.2 K and 300 K in magnetic fields up to 5 T. The samples with y = 0 and d = 0 showed superconductivity for x between 0.055 and 0.30. The critical temperature, the Hall and Seebeck coefficients depend strongly on Zn contents. The phonon specific heat and electronic specific heat have been extracted from the total specific heat, where anomalous x, y and T dependence related to the so-called 1/8 anomaly or the "stripe order" is observed. Zn-doping effect or the behavior γ (T) = Cel/T suggest that large range stripe order and the fluctuating "stripe" suppress the singlet formation and pseudo-gap.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0407d3c9e3e4ef3c2526758ccb175a11 https://doi.org/10.1142/s0217979202012177 Zobrazit plný text záznamu