TY - JOUR
AU - D.J Keeble
AU - A Krishnan
AU - T Friessnegg
AU - B Nielsen
AU - S Madhukar
AU - S Aggarwal
AU - Ramamoorthy Ramesh
AU - E.H Poindexter
AB - Vacancy-related defects in laser ablated thin films of the conducting metal-oxide La0.5Sr0.5CoO3-δ were detected using a variable-energy positron beam. The nonstoichiometry, δ, was altered by varying the oxygen partial pressure within the deposition chamber present during cooling. Conductivity measurements confirmed the change in oxygen content. Increased positron trapping at vacancy defects was observed with increasing nonstoichiometry. It is proposed that vacancy clusters were present in the film cooled in 10-5Torr oxygen. © 1998 American Institute of Physics.
BT - Applied Physics Letters
DO - 10.1063/1.121916
LA - eng
M1 - 4
N1 - cited By 18
N2 - Vacancy-related defects in laser ablated thin films of the conducting metal-oxide La0.5Sr0.5CoO3-δ were detected using a variable-energy positron beam. The nonstoichiometry, δ, was altered by varying the oxygen partial pressure within the deposition chamber present during cooling. Conductivity measurements confirmed the change in oxygen content. Increased positron trapping at vacancy defects was observed with increasing nonstoichiometry. It is proposed that vacancy clusters were present in the film cooled in 10-5Torr oxygen. © 1998 American Institute of Physics.
PY - 1998
SP - 508
EP - 510
T2 - Applied Physics Letters
TI - Vacancy defects in thin-film La0.5Sr0.5CoO3-δ observed by positron annihilation
VL - 73
SN - 00036951
ER -