Superconducting epitaxial thin films of CeNixBi2 with a bismuth square net structure

Autor:	Jose Kurian, Reiner Retzlaff, Alexander Buckow, Katharina Kupka, Lambert Alff
Rok vydání:	2012
Předmět:	Superconductivity High-temperature superconductivity Materials science Physics and Astronomy (miscellaneous) Condensed matter physics chemistry.chemical_element Epitaxy Bismuth law.invention chemistry Electron diffraction law X-ray crystallography Thin film Molecular beam epitaxy
Zdroj:	Applied Physics Letters. 101:162602
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.4760264
Popis:	We have grown highly epitaxial and phase pure thin films of the arsenic-free pnictide compound CeNixBi2 on (100) MgO substrates by reactive molecular beam epitaxy (RMBE). X-ray diffraction and reflection high-energy electron diffraction of the films confirm the ZrCuSiAs structure with a Bi square net layer. Superconductivity was observed in magnetization and resistivity measurements for x = 0.75 to 0.93 in these CeNixBi2 thin films with the highest critical temperature of 4.05 K and a resistive transition width of 0.1 K for x = 0.86. Our results indicate that thin film deposition by RMBE provides a tool to synthesize high-quality pnictide superconductors of the novel 112 type.
Databáze:	OpenAIRE
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