300 keV proton irradiation effects on structural properties of thin RE1Ba2Cu3O7−δ films
作者： T. Kroener , G. Linker , O. Meyer , S. Massing , B. Strehlau
DOI: 10.1016/0921-4534(93)90101-U
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摘要: Abstract We report the effects of 300 keV proton irradiations on structural properties thin RE 1 Ba 2 Cu 3 O 7− δ films (RE = rare earth) grown in different orientations ([100], [001], [110]). The are studied by X-ray and electron diffraction measurements. All three lattice parameters orthorhombic structure increase under irradiation loss superconductivity is not directly connected with an to tetragonal phase transition. leads formation a new √2 c ×√2 ×3a ( ≈3.8 A ) superstructure which forms oxygen reordering basal plane unit cell without loss. This thought be strongly correlated observed metal-insulator transition due carrier concentration reduction CuO -planes. Distinct intensity variations indicate atomic displacements cationic sublattices.
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