caa a22 4500 477059619 CHVBK 20180405111356.0 cr unu---uuuuu 170330e19961001xx s 000 0 eng 10.1007/BF02437134 doi (NATIONALLICENCE)springer-10.1007/BF02437134 Bogdanovich M. aut Crystal structure and mechanical strain in polycrystalline ferrite films on polycrystalline sapphire substrates [Elektronische Daten] [M. Bogdanovich] We have grown films of magnesium, lithium, zinc, and nickel-zinc ferrites, varying in thickness from 0.5 to 8 μm on polycrystalline sapphiresubstrates by coating the surface of the substrate with an aqueous nitric acid solution of salts of the elements which compose the ferrite. The lattice parameter of the ferrite film increases with the film thickness and becomes constant at thicknesses greater than 8 μm. We have determined the ratio of the theoretical strength limit to the macroscopic one in the film based on the change in the interplanar distanced 220 and the lattice parameter calculated from it, under the assumption that the changeΔa(h)=a ∞=a(h) results from macroscopic stresses in the film. This ratio shows that whenh=1 μm the microstresses in the film are an order of magnitude smaller than the theoretical strength limit. At larger film thicknesses this macroscopic stress becomes even lower, and at the external surface of thick films it goes completely to zero. Plenum Publishing Corporation, 1997 Russian Physics Journal Kluwer Academic Publishers-Consultants Bureau 39/10(1996-10-01), 924-927 1064-8887 39:10<924 1996 39 11182 https://doi.org/10.1007/BF02437134 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02437134 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Bogdanovich M. aut NATIONALLICENCE 773 0- Russian Physics Journal Kluwer Academic Publishers-Consultants Bureau 39/10(1996-10-01), 924-927 1064-8887 39:10<924 1996 39 11182 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer