Neutron Diffraction Structural Study of Ce₂Fe₁₇₋ₓGaₓ

Author

H. Luo
Z. Hu
William B. Yelon, Missouri University of Science and TechnologyFollow
Sanjay R. Mishra
Gary J. Long, Missouri University of Science and TechnologyFollow
Oran Allan Pringle, Missouri University of Science and TechnologyFollow
D. P. Middleton
K. H. J. Buschow

Abstract

Six samples of Ce₂Fe_17-xGa_x with nominal Ga content x equal to 0, 0.3, 0.5, 0.7, 1.0, 2.0 have been studied by powder neutron diffraction at room temperature. Both crystalline and magnetic refinements have been carried out. All six samples adopt the Th₂Zn₁₇-type rhombohedral structure. The only additional phase found is α-iron. Gallium atoms are found to have high affinity for the iron 18h site, and are absent from the 9d and 18f sites. The Ga substitution for Fe leads to an expansion of both the a and c axes. The Curie temperature increases from 238 K for Ce₂Fe₁₇ to 406 K for Ce₂Fe₁₅Ga₂. Magnetic refinements on the samples with x = 0.3, 0.5, 0.7, 1.0, and 2.0 reveal that the magnetic moments of the four Fe sites are in the basal plane and that their values increase with increasing Ga content.

Recommended Citation

H. Luo et al., "Neutron Diffraction Structural Study of Ce₂Fe₁₇₋ₓGaₓ," Journal of Applied Physics, vol. 79, no. 8, American Institute of Physics (AIP), Aug 1996.

The definitive version is available at https://doi.org/10.1063/1.362048

Department(s)

Physics

Second Department

Chemistry

International Standard Serial Number (ISSN)

0021-8979

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 1996 American Institute of Physics (AIP), All rights reserved.

Publication Date

01 Aug 1996