No Access Submitted: 08 September 1986 Accepted: 19 December 1986 Published Online: 04 June 1998
Journal of Applied Physics 61, 2993 (1987); https://doi.org/10.1063/1.337849
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  • Department of Materials Science and Mineral Engineering and National Center for Electron Microscopy, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
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  • R. Ramesh
  • J. K. Chen
  • G. Thomas
Results of structural and microanalytical studies on sintered iron rare‐earth boron permanent magnets are presented in this paper. It is shown that the structure of the phase present at the two‐grain boundaries is the same as that of the phase at the three‐grain junctions; both are fcc with a lattice parameter of 5.24 Å. It is also shown that this fcc phase is stabilized by the presence of significant quantities of oxygen. The possible effects of thin foil preparation by ion milling techniques in producing the observed bcc phase are also briefly discussed.
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  1. © 1987 American Institute of Physics.