Growth of in-plane textured LuNi2B2C thin films: correlation among structural, morphological and electrical properties
Thin films of the intermetallic superconducting compound LuNi2B2C have been prepared by pulsed laser ablation, and different deposition parameters (substrate temperature, target-substrate distance, laser beam energy density and thickness) have been the subject of extensive studies to optimize growth. The best samples show electrical properties similar to those of single crystals ( [iopmath latex="$T_c=16.4$"] Tc = 16.4 [/iopmath] K, [iopmath latex="$\Delta T_c=0.3$"] Tc = 0.3 [/iopmath] K, [iopmath latex="$RRR=13$"] RRR = 13 [/iopmath] ), are strongly c-axis-oriented, and present a high density of in-plane-oriented surface structures. This in-plane texturing is found only in films some thousands of ångström thick, while if the thickness is reduced below 1000-1500 Å the samples are very flat, but there is no evidence of in-plane texturing.
Document Type: Miscellaneous
INFM-Dipartimento di Fisica, Università di Genova, via Dodecaneso 33, 16146 Genova, Italy
INFM-Dipartimento di Scienze Fisiche, Università di Napoli `Federico II', Piazzale Tecchio 80, 80125 Napoli, Italy
Publication date: March 1, 2001