Magnetic properties of Sm sub 2 Fe sub 17 C sub x compounds

Journal Article · Mon Apr 15 00:00:00 EDT 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.347951· OSTI ID:5690285

Wang, Y Z; Hadjipanayis, G C ^[1]

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1. Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716 (USA)

A systematic investigation of the magnetic and structural properties of as-cast Sm{sub 2}Fe{sub 17}C{sub {ital x}} compounds with 0{le}{ital x}{le}1.5 has been made with x-ray diffraction, thermomagnetic analysis, and superconducting quantum interference device magnetometry. Crystal structure studies have shown that the ternary carbides form a rhombohedral Th{sub 2}Zn{sub 17}-type structure. The lattice constants at room temperature increase with {ital x}, indicating that carbon substitutes interstitially. The Curie temperature increases strongly with {ital x} from {ital T}{sub {ital C}} = 130 {degree}C for {ital x}=0 to 247 {degree}C for {ital x}=1.5. The introduction of interstitial carbon atoms into the 2:17 structure leads to a dramatic change in the magnetic anisotropy of Sm{sub 2}Fe{sub 17}C{sub {ital x}} compounds. The value of {ital K}{sub 1} increases with increasing {ital x}, and a transition from an easy-plane'' to an easy-axis'' anisotropy takes place.

• OSTI ID: 5690285
• Journal Information: Journal of Applied Physics; (USA), Vol. 69:8; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON CARBIDES
MAGNETIC PROPERTIES
SAMARIUM CARBIDES
ANISOTROPY
CRYSTAL STRUCTURE
CURIE POINT
LATTICE PARAMETERS
MAGNETIZATION
CARBIDES
CARBON COMPOUNDS
IRON COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SAMARIUM COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
360204* - Ceramics
Cermets
& Refractories- Physical Properties