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Coherent convergent beam electron diffraction for analysis of lattice fitting in PbTe/MgO bi-crystals (1997)

Tanaka, Nobuo ; Egi, Masashi ; Kimoto, Kouji

Springer

Interface science 4 (1997), S. 181-189

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ISSN: 1573-2746

Keywords: coherent CBED ; PbTe/MgO bi-crystals ; lattice fitting ; rigid-body shift ; interference fringes ; multislice simulation ; mirror-symmetry ; FE-TEM

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics

Notes: Abstract Coherent convergent beam electron diffraction is for the first time applied to the analysis of lattice fitting between vacuum-deposited PbTe and MgO thin crystals in the plan-view mode. The possibility of determination of the rigid-body shift is discussed on the basis of simulated diffraction patterns from the bi-crystals as well as the preliminary experimental results obtained by a 200 kV transmission electron microscope with a field emission electron gun. In the analysis, the importance of the position of interference fringes at overlaps of PbTe 200 and MgO 200 diffraction disks and that of the corresponding mirror symmetry in the whole pattern are emphasized in order to determine the rigid-body shift and the probe-position.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00240240

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Structural study of nanometer-sized iron crystallites in single crystalline iron-mgo composite films (1989)

Tanaka, Nobuo ; Nagao, Masaru ; Yoshizaki, Fukio ; [et al.]

New York, NY : Wiley-Blackwell

Journal of Electron Microscopy Technique 12 (1989), S. 272-280

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ISSN: 0741-0581

Keywords: Composite films ; Cermet ; Nano-crystals ; HREM ; Nano-diffraction ; Spinel ; Phase transformation ; Gamma-iron ; Embedded crystallites ; MgO-matrix Epitaxial growth ; Magnetic property ; Life and Medical Sciences ; Cell & Developmental Biology

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Natural Sciences in General

Notes: Single crystalline composite films of iron and MgO are prepared by a simultaneous vacuum deposition technique. The structures of the composite films, especially of the iron crystallites embedded, are studied by high-resolution electron microscopy and nanometer-area electron diffraction. The α-iron (b.c.c.) crystallites of 1 nm in size are epitaxially embedded in single crystalline MgO films, the orientation being (011)[100]Fe/(001)[100]Mgo and (001)[110]Fe//(001)[100]Mgo. A heat treatment of the as-grown films at 500-1,000°C brings about a phase transformation of the crystallites from α-iron to γ-iron (f.c.c.), followed by a grain growth of α-iron and finally the growth of the spinel, MgFe2O4. The γ-iron crystallites transformed are circular plates and have strains at the periphery to accommodate the surrounding MgO-matrix. The magnetic property of the composite films is also reported.

Additional Material: 10 Ill.