Nanostructures and thin films of transparent conductive oxides studied by perturbed angular correlations

authors	Barbosa, MB; Goncalves, JN; Redondo-Cubero, A; Miranda, SMC; Simon, R; Kessler, P; Brandt, M; Henneberger, F; Nogales, E; Mendez, B; Johnston, K; Alves, E; Vianden, R; Araujo, JP; Lorenz, K; Correia, JG
nationality	International
journal	PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
author keywords	CdZnO; density functional theory; Ga2O3; ion implantation; lattice location; perturbed angular correlations; ZnO
keywords	HYPERFINE INTERACTIONS; BETA-GA2O3; ZNO; NANOWIRES
abstract	The versatility of perturbed angular correlations (PAC) in the study of nanostructures and thin films is demonstrated, namely for the specific cases of ZnO/CdxZn(1-x)O thin films and Ga2O3 powder pellets and nanowires, examples of transparent conductive oxides. PAC measurements as a function of annealing temperature were performed after implantation of Cd-111m/Cd-111 (T-1/2 48 min) and later compared to density functional theory simulations. For ZnO, the substitution of Cd probes at Zn sites was observed, as well as the formation of a probe-defect complex. The ternary CdxZn(1-x)O (x = 0.16) showed good macroscopic crystal quality but revealed some clustering of local defects around the probe Cd atoms, which could not be annealed. In the Ga2O3 samples, the substitution of the Cd probes in the octahedral Ga-site was observed, demonstrating the potential of ion-implantation for the doping of nanowires. (C) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
publisher	WILEY-V C H VERLAG GMBH
issn	0370-1972
year published	2013
volume	250
issue	4
beginning page	801
ending page	808
digital object identifier (doi)	10.1002/pssb.201200923
web of science category	Physics, Condensed Matter
subject category	Physics
unique article identifier	WOS:000318791900027