Anisotropic Electrical Resistivity of YBCO/PBCO Superlattice Films Grown on Miscut Substrates

Autor:	H. R. Kerchner, David K. Christen, D. H. Lowndes, C.E. Klabunde, J. O. Thomson, John D. Budai, David P. Norton
Rok vydání:	1992
Předmět:	Laser ablation Materials science chemistry Solid-state physics Condensed matter physics Praseodymium Electrical resistivity and conductivity Superlattice Supercurrent Inorganic chemistry chemistry.chemical_element Anisotropy Epitaxy
Zdroj:	MRS Proceedings. 275
ISSN:	1946-4274 0272-9172
DOI:	10.1557/proc-275-353
Popis:	Anisotropie electrical resistivity is studied in epitaxial superlattice films of YBa2Cu3O7-δ/PrBa2Cu3O7-ε grown in situ by laser ablation on SrTiO3 surfaces aligned slightly away from the [100] direction. Layer thicknesses of each compound range from two to eight atomic cells. Electrical resistivity of these superlattice films always shows a peak at some cryogenic temperature that decreases with increasing PrBa2Cu3O7-ε layer thickness. Clear evidence is seen of vortex pinning or of supercurrent blocking by the step edges or by twin boundaries. The ratio of electrical resistivities for current directions parallel and perpendicular to these boundaries shows a large step-like change just above the superconductive critical temperature. The possibility is discussed that the Kosterlitz-Thouless transition explains this anisotropy change.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3b2e7b83ed4687e8e79915d85036cbf0 https://doi.org/10.1557/proc-275-353 Zobrazit plný text záznamu Full text from SpringerLink