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X-ray powder diffraction studies of (Bax Sr1− x )2Co2Fe12O22 and (Bax Sr1− x )Co2Fe16O27

Published online by Cambridge University Press:  11 March 2015

W. Wong-Ng ,
G. Liu ,
Y. Yan ,
K. R. Talley  and
J. A. Kaduk
W. Wong-Ng*
Affiliation:
Materials Measurement Science Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
G. Liu
Affiliation:
Institutes of Physics, Chinese Academy of Sciences, Beijing 100008, China
Y. Yan
Affiliation:
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, Hubei 430070, China
K. R. Talley
Affiliation:
Department of Materials Science and Engineering, Boise State University, Boise, Idaho 83725
J. A. Kaduk
Affiliation:
BCPS, Illinois Institute of Technology, Chicago, Illinois 60616
*
a) Author to whom correspondence should be addressed. Electronic mail: winnie.wong-ng@nist.gov
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Abstract

X-ray structural characterization and X-ray reference powder patterns have been determined for two series of iron- and cobalt-containing layered compounds (Bax Sr1− x )2Co2Fe12O22 (x = 0.2, 0.4, 0.6, 0.8) and (Bax Sr1− x )Co2Fe16O27 (x = 0.2, 0.4, 0.6, 0.8). The (Bax Sr1− x )2Co2Fe12O22 series of compounds crystallized in the space group R $\bar 3$ m (No. 166), with Z = 3. The structure is essentially that of the Y-type hexagonal ferrite, BaM 2+Fe6 3+O11. The lattice parameters range from a = 5.859 15(8) to 5.843 72(8) Å, and c = 43.4975(9) to 43.3516(9) Å for x = 0.2 to 0.8, respectively. The (Bax Sr1− x )Co2Fe16O27 series (W-type hexagonal ferrite) crystallized in the space group P63/mmc (No. 194) and Z = 2. The lattice parameters range from a = 5.902 05(12) to 5.8979(2) Å and c = 32.9002(10) to 32.8110(13) Å for x = 0.2 to 0.8. Results of measurements of the Seebeck coefficient and resistivity of these two sets of samples indicated that they are insulators. Powder X-ray diffraction patterns of these two series of compounds have been submitted to be included in the Powder Diffraction File.

Keywords

(Bax Sr1− x )2Co2Fe12O22(Bax Sr1− x )Co2Fe16O27crystal structurepowder X-ray diffraction patterns
Type
Technical Articles
Information
Powder Diffraction , Volume 30 , Issue 2 , June 2015 , pp. 139 - 148
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Copyright
Copyright © International Centre for Diffraction Data 2015 

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