Oxygen diffusion in epitaxialYBa2Cu3O7−xthin films
نویسندگان
چکیده
منابع مشابه
Dislocations Accelerate Oxygen Ion Diffusion in La0.8Sr0.2MnO3 Epitaxial Thin Films
Revealing whether dislocations accelerate oxygen ion transport is important for providing abilities in tuning the ionic conductivity of ceramic materials. In this study, we report how dislocations affect oxygen ion diffusion in Sr-doped LaMnO3 (LSM), a model perovskite oxide that serves in energy conversion technologies. LSM epitaxial thin films with thicknesses ranging from 10 nm to more than ...
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The oxygen diffusion in Y B a X u j O ^ , , was studied between 300 K and 1273 K in flowing oxygen by monitoring the 1 3 Ba(EC) Cs nuclear quadrupole interaction by time differential perturbed angular correlation. The data are analyzed in a model of two different nearest neighbour oxygen configurations and yield hopping rates, the energy barrier and the difference in free enthalpy between both ...
متن کاملDiffusion in Stressed Thin Films
The effect of mechanical stress on interdiffusion in a binary substitutional solid solution has been investigated from a theoretical point of view. Fick's first law, stating that the diffusional flux is proportional to the concentration (chemical potential) gradient, is the basic equation for diffusional mass transport. Limits of its validity, in particular in a state of non-hydrostatic stress,...
متن کاملApparent Oxygen Uphill Diffusion in La0.8Sr0.2MnO3 Thin Films upon Cathodic Polarization
The impact of cathodic bias on oxygen transport in La0.8Sr0.2MnO3 (LSM) thin films was investigated. Columnar-grown LSM thin films with different microstructures were deposited by pulsed laser deposition. 18O tracer experiments were performed on thin film microelectrodes with an applied cathodic bias of -300 or -450 mV, and the microelectrodes were subsequently analyzed by time-of-flight second...
متن کاملTensile Lattice Strain Accelerates Oxygen Surface Exchange and Diffusion in La1–xSrxCoO3−δ Thin Films
The influence of lattice strain on the oxygen exchange kinetics and diffusion in oxides was investigated on (100) epitaxial La1-xSrxCoO3-δ (LSC) thin films grown by pulsed laser deposition. Planar tensile and compressively strained LSC films were obtained on single-crystalline SrTiO3 and LaAlO3. 18O isotope exchange depth profiling with ToF-SIMS was employed to simultaneously measure the tracer...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1992
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.46.9142