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Title: Barium hexaferrite (M-phase) exhibiting superstructure

Abstract

Barium hexaferrite (M-phase) prepared by the flux method is found to exhibit a ..sqrt..3a x ..sqrt..3a superstructure similar to barium hexaaluminate. Morgan and Shaw as well as Iyi et al have recently reported the formation of a barium-rich phase of barium hexaaluminate possessing a ..sqrt..3a x ..sqrt..3a superstructure of the magnetoplumbite structure. In view of the similarities between the layer structures of ..beta..-aluminas and the corresponding ferrites the authors have been carrying out electron microscopic investigations of potassium ..beta..-alumina and BaA1/sub 12/O/sub 19/ along with ferrites of similar compositions. They have obtained electron diffraction patterns of barium hexaaluminate identical to those obtained by Morgan and Shaw and Iyi et al, but more interestingly, they have found a phase of barium hexaferrite (M-phase) exhibiting the ..sqrt..3a x ..sqrt..3a superstructure.

Authors:
; ;
Publication Date:
Research Org.:
Solid State and Structural Chemistry Unit Indian Institute of Science Bangalore
OSTI Identifier:
5088379
Resource Type:
Journal Article
Journal Name:
Mater. Res. Bull.; (United States)
Additional Journal Information:
Journal Volume: 19:5
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BARIUM COMPOUNDS; CHEMICAL PREPARATION; CRYSTAL STRUCTURE; FERRITES; ALUMINIUM OXIDES; ELECTRON DIFFRACTION; ALKALINE EARTH METAL COMPOUNDS; ALUMINIUM COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; DIFFRACTION; FERRIMAGNETIC MATERIALS; IRON COMPOUNDS; MAGNETIC MATERIALS; MATERIALS; OXIDES; OXYGEN COMPOUNDS; SCATTERING; SYNTHESIS; TRANSITION ELEMENT COMPOUNDS; 360601* - Other Materials- Preparation & Manufacture; 360602 - Other Materials- Structure & Phase Studies

Citation Formats

Ganapathi, L, Gopalakrishnan, J, and Rao, C N.R. Barium hexaferrite (M-phase) exhibiting superstructure. United States: N. p., 1984. Web. doi:10.1016/0025-5408(84)90136-3.
Ganapathi, L, Gopalakrishnan, J, & Rao, C N.R. Barium hexaferrite (M-phase) exhibiting superstructure. United States. https://doi.org/10.1016/0025-5408(84)90136-3
Ganapathi, L, Gopalakrishnan, J, and Rao, C N.R. 1984. "Barium hexaferrite (M-phase) exhibiting superstructure". United States. https://doi.org/10.1016/0025-5408(84)90136-3.
@article{osti_5088379,
title = {Barium hexaferrite (M-phase) exhibiting superstructure},
author = {Ganapathi, L and Gopalakrishnan, J and Rao, C N.R.},
abstractNote = {Barium hexaferrite (M-phase) prepared by the flux method is found to exhibit a ..sqrt..3a x ..sqrt..3a superstructure similar to barium hexaaluminate. Morgan and Shaw as well as Iyi et al have recently reported the formation of a barium-rich phase of barium hexaaluminate possessing a ..sqrt..3a x ..sqrt..3a superstructure of the magnetoplumbite structure. In view of the similarities between the layer structures of ..beta..-aluminas and the corresponding ferrites the authors have been carrying out electron microscopic investigations of potassium ..beta..-alumina and BaA1/sub 12/O/sub 19/ along with ferrites of similar compositions. They have obtained electron diffraction patterns of barium hexaaluminate identical to those obtained by Morgan and Shaw and Iyi et al, but more interestingly, they have found a phase of barium hexaferrite (M-phase) exhibiting the ..sqrt..3a x ..sqrt..3a superstructure.},
doi = {10.1016/0025-5408(84)90136-3},
url = {https://www.osti.gov/biblio/5088379}, journal = {Mater. Res. Bull.; (United States)},
number = ,
volume = 19:5,
place = {United States},
year = {Tue May 01 00:00:00 EDT 1984},
month = {Tue May 01 00:00:00 EDT 1984}
}