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

Journal Article · Mon Apr 15 04:00:00 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), Journal Name: Journal of Applied Physics; (USA) Vol. 69:8; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

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