Rare earth iron based magnet materials with the ThP sub 2 zn sub 17 -type structure
- Inst. fur Physikalische Chemie der Universitat Wien, A01090 Wien, Wahringerstrsse 42 (AT)
The influence of the substitution mode on the magnetic behavior in Re{sup z}Fe{sup 17} has been investigated as a function of the metal substitution (Fe replaced by Mn, Al,Ga) and the accommodation of interstitial carbon atoms. X-ray powder analysis proved in all cases consistency with the rhombohedral Th{sup 2}Zn{sup 17}-type structure (space group R{bar 3}m). In correspondence with the resulting volume expansion, Curie temperatures tend to increase as a result of an enhanced ferromagnetic coupling mechanism. Sm{sup 2}Fe{sup 17 {minus} x {minus} y}Mnx(Al,Ga)y C{sup 3{minus}z}, however, is the only system where substitution of iron in Sm{sup 2}Fe{sup 17} by Mn, Al, Ga and/or carbon leads to an anisotropy change from easy plane to easy axis geometry. Magnetization values are strongly reduced due to a change of collinear ferromagnetism to a ferrimagnetic type of order of the various magnetic sublattices.
- OSTI ID:
- 5977950
- Journal Information:
- IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (USA), Vol. 26:5, Issue 5; ISSN 0018-9464
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
74 ATOMIC AND MOLECULAR PHYSICS
MAGNETS
CHEMICAL COMPOSITION
RARE EARTH ALLOYS
MAGNETIC PROPERTIES
ATOM TRANSPORT
CARBON
COUPLING
CRYSTAL DOPING
CURIE POINT
FERROMAGNETIC MATERIALS
IRON
MANGANESE
MICROSTRUCTURE
POWDERS
SAMARIUM
X-RAY DIFFRACTION
ALLOYS
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
ELEMENTS
MAGNETIC MATERIALS
MATERIALS
METALS
NEUTRAL-PARTICLE TRANSPORT
NONMETALS
PHYSICAL PROPERTIES
RADIATION TRANSPORT
RARE EARTHS
SCATTERING
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
360204* - Ceramics
Cermets
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360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies
640302 - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory