Cerium-iron-based magnetic compounds
Abstract
New magnetic materials containing cerium, iron, and small additions of a third element are disclosed. These materials comprise compounds Ce(Fe.sub.12-xM.sub.x) where x=1-4, having the ThMn.sub.12 tetragonal crystal structure (space group I4/mmm, #139). Compounds with M=B, Al, Si, P, S, Sc, Co, Ni, Zn, Ga, Ge, Zr, Nb, Hf, Ta, and W are identified theoretically, and one class of compounds based on M=Si has been synthesized. The Si cognates are characterized by large magnetic moments (4.pi.M.sub.s greater than 1.27 Tesla) and high Curie temperatures (264.ltoreq.T.sub.c.ltoreq.305.degree. C.). The Ce(Fe.sub.12-xM.sub.x) compound may contain one or more of Ti, V, Cr, and Mo in combination with an M element. Further enhancement in T.sub.c is obtained by nitriding the Ce compounds through heat treatment in N.sub.2 gas while retaining the ThMn.sub.12 tetragonal crystal structure; for example CeFe.sub.10Si.sub.2N.sub.1.29 has T.sub.c=426.degree. C.
- Inventors:
- Issue Date:
- Research Org.:
- GM Global Technology Operations LLC, Detroit, MI (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1339612
- Patent Number(s):
- 9548150
- Application Number:
- 13/786,807
- Assignee:
- GM Global Technology Operations LLC (Detroit, MI)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01F - MAGNETS
- DOE Contract Number:
- AR0000195
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2013 Mar 06
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Zhou, Chen, Pinkerton, Frederick E., and Herbst, Jan F. Cerium-iron-based magnetic compounds. United States: N. p., 2017.
Web.
Zhou, Chen, Pinkerton, Frederick E., & Herbst, Jan F. Cerium-iron-based magnetic compounds. United States.
Zhou, Chen, Pinkerton, Frederick E., and Herbst, Jan F. Tue .
"Cerium-iron-based magnetic compounds". United States. https://www.osti.gov/servlets/purl/1339612.
@article{osti_1339612,
title = {Cerium-iron-based magnetic compounds},
author = {Zhou, Chen and Pinkerton, Frederick E. and Herbst, Jan F.},
abstractNote = {New magnetic materials containing cerium, iron, and small additions of a third element are disclosed. These materials comprise compounds Ce(Fe.sub.12-xM.sub.x) where x=1-4, having the ThMn.sub.12 tetragonal crystal structure (space group I4/mmm, #139). Compounds with M=B, Al, Si, P, S, Sc, Co, Ni, Zn, Ga, Ge, Zr, Nb, Hf, Ta, and W are identified theoretically, and one class of compounds based on M=Si has been synthesized. The Si cognates are characterized by large magnetic moments (4.pi.M.sub.s greater than 1.27 Tesla) and high Curie temperatures (264.ltoreq.T.sub.c.ltoreq.305.degree. C.). The Ce(Fe.sub.12-xM.sub.x) compound may contain one or more of Ti, V, Cr, and Mo in combination with an M element. Further enhancement in T.sub.c is obtained by nitriding the Ce compounds through heat treatment in N.sub.2 gas while retaining the ThMn.sub.12 tetragonal crystal structure; for example CeFe.sub.10Si.sub.2N.sub.1.29 has T.sub.c=426.degree. C.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {1}
}
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