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Title: Neutron diffraction and extended x-ray absorption fine structure studies of Pr{sub 3}(Fe{sub 1{minus}x}Co{sub x}){sub 27.5}Ti{sub 1.5} permanent magnet compounds

Abstract

Neutron diffraction (ND) and extended x-ray absorption fine structure (EXAFS) measurements were carried out to determine the long-range and short-range structural properties of Co-substituted Pr{sub 3}Fe{sub 1{minus}x}Co{sub x}Ti{sub 1.5} compounds. ND refinement analysis indicates Ti atoms occupy the 4g and 4i Fe sites and Co atoms occupy, without preference, those Fe sites not shared with the Ti atoms. EXAFS measurements show the local environment of the Pr experiences increasing static disorder with the introduction of Co, and its coordination sphere contracts in the vicinity of those Co near neighbors. The Fe local environment remains unaffected with the introduction of Co suggesting that substitution in excess of 40% can be achieved in this structure.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Naval Research Lab., Washington, DC (US)
OSTI Identifier:
20000756
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)
Additional Journal Information:
Journal Volume: 35; Journal Issue: 5Pt2; Conference: 1999 international magnetics conference (Intermag '99), Kyongju (KR), 05/18/1999--05/21/1999; Other Information: PBD: Sep 1999; Journal ID: ISSN 0018-9464
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CRYSTAL STRUCTURE; PRASEODYMIUM ALLOYS; IRON BASE ALLOYS; COBALT ALLOYS; TITANIUM ALLOYS; PERMANENT MAGNETS

Citation Formats

Harris, V.G., Huang, Q., Shah, V.R., Markandeyulu, G., Rama Rao, K.V.S., Huang, M.Q., Sirisha, K., and McHenry, M.E. Neutron diffraction and extended x-ray absorption fine structure studies of Pr{sub 3}(Fe{sub 1{minus}x}Co{sub x}){sub 27.5}Ti{sub 1.5} permanent magnet compounds. United States: N. p., 1999. Web. doi:10.1109/20.800500.
Harris, V.G., Huang, Q., Shah, V.R., Markandeyulu, G., Rama Rao, K.V.S., Huang, M.Q., Sirisha, K., & McHenry, M.E. Neutron diffraction and extended x-ray absorption fine structure studies of Pr{sub 3}(Fe{sub 1{minus}x}Co{sub x}){sub 27.5}Ti{sub 1.5} permanent magnet compounds. United States. doi:10.1109/20.800500.
Harris, V.G., Huang, Q., Shah, V.R., Markandeyulu, G., Rama Rao, K.V.S., Huang, M.Q., Sirisha, K., and McHenry, M.E. Wed . "Neutron diffraction and extended x-ray absorption fine structure studies of Pr{sub 3}(Fe{sub 1{minus}x}Co{sub x}){sub 27.5}Ti{sub 1.5} permanent magnet compounds". United States. doi:10.1109/20.800500.
@article{osti_20000756,
title = {Neutron diffraction and extended x-ray absorption fine structure studies of Pr{sub 3}(Fe{sub 1{minus}x}Co{sub x}){sub 27.5}Ti{sub 1.5} permanent magnet compounds},
author = {Harris, V.G. and Huang, Q. and Shah, V.R. and Markandeyulu, G. and Rama Rao, K.V.S. and Huang, M.Q. and Sirisha, K. and McHenry, M.E.},
abstractNote = {Neutron diffraction (ND) and extended x-ray absorption fine structure (EXAFS) measurements were carried out to determine the long-range and short-range structural properties of Co-substituted Pr{sub 3}Fe{sub 1{minus}x}Co{sub x}Ti{sub 1.5} compounds. ND refinement analysis indicates Ti atoms occupy the 4g and 4i Fe sites and Co atoms occupy, without preference, those Fe sites not shared with the Ti atoms. EXAFS measurements show the local environment of the Pr experiences increasing static disorder with the introduction of Co, and its coordination sphere contracts in the vicinity of those Co near neighbors. The Fe local environment remains unaffected with the introduction of Co suggesting that substitution in excess of 40% can be achieved in this structure.},
doi = {10.1109/20.800500},
journal = {IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)},
issn = {0018-9464},
number = 5Pt2,
volume = 35,
place = {United States},
year = {1999},
month = {9}
}