Growth of Barium Ferrite for Magnetic Optical Devices.

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Abstract:

Single crystals of BaFe12O19 grown from a BaO-B2O3-PbO flux show the classical hexagonal cells hiterto known to occur in constitutionally supercooled solidified metallic alloys. The size of the cells varies from 10-20 micrometers increasing with the amount of the PbO in the flux. Electron microprobe analysis across both longitudinal 1010 and transveral 0001 slices of the cells shows a strong periodical variation of Ca and Sr inpurities as well as a slight periodical variation of the concentration of Ba, Pb and Fe at the cell boundaries of the constitutionally supercooled BaFe12O19 crystals. The suppression of the cellular growth has not been successful so far. The use of high purity BaCO as a source for BaO is the most recommended future growth experiment. Author

Author(s):
Schieber, M. ; Aidelberg, J. ; Flicstein, J.
Author Organization(s):
HEBREW UNIV JERUSALEM (ISRAEL) GRADUATE SCHOOL OF APPLIED SCIENCE AND TECHNOLOGY
Descriptive Note:
Final technical rept. 1 Jan-31 Dec 73,
Pagination:
0028

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
DAJA37-73-C-2415
Project Number(s):
DA-2-0-061102-B-31-E
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*BARIUM FERRITES, *CRYSTAL GROWTH, BARIUM OXIDES, BORON OXIDES, LEAD OXIDES, SUPERCOOLING, CALCIUM, STRONTIUM, GRAIN SIZE, MAGNETOOPTICS, ISRAEL
Field(s)/Group(s):
Crystallography
Report Date:
1973 Dec 01