Published March 1, 1986 | Version v1
Journal article Metadata-only

Crystal structure of acicular γ-Fe2O3 particles used in recording media

Creators

  • 1. Department of Materials Science and Mineral Engineering, Materials and Molecular Research Division and the National Center for Electron Microscopy, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720

Description

γ-Fe2O3 particles have been examined by convergent beam electron diffraction to determine the crystal symmetry. The particles have a primitive lattice with an m3m point group and a cubic superstructure with lattice parameter approximately equal to three times the lattice parameter of the magnetite structure. This superlattice is a result of cation vacancy ordering. During observation, disordering in the electron microscope occurs and is believed to be caused by electron radiation-enhanced diffusion

Additional details

Publishing Information

Journal Title
J. Appl. Phys.
Journal Volume
59
Journal Issue
5
Series
J. Appl. Phys.
Journal Page Range
1606-1610
ISSN
0021-8979
CODEN
JAPIA

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
17049980
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
CRYSTAL STRUCTURE; DIFFUSION; ELECTRON DIFFRACTION; ELECTRON MICROSCOPY; IRON OXIDES; LATTICE PARAMETERS; MAGNETIC TAPES; MATERIALS; ORDER-DISORDER TRANSFORMATIONS; SUPERLATTICES; VACANCIES
Descriptors DEC
CHALCOGENIDES; COHERENT SCATTERING; CRYSTAL DEFECTS; DIFFRACTION; IRON COMPOUNDS; MAGNETIC STORAGE DEVICES; MEMORY DEVICES; MICROSCOPY; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; POINT DEFECTS; SCATTERING; TRANSITION ELEMENT COMPOUNDS