Structure and magnetic properties of R sub 2 Fe sub 17 C sub x ( x similar to 2. 5)

Journal Article · Mon Jan 06 04:00:00 EST 1992 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.107346· OSTI ID:5526700

Liao, L X; Chen, X; Altounian, Z; Ryan, D H ^[1]

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1. Centre for the Physics of Materials, McGill University, 3600 University St., Montreal, Quebec, H3A 2T8 (Canada). Department of Physics

A series of rare-earth iron carbides were prepared by heat treatment of R{sub 2}Fe{sub 17} compounds in methane. The nominal composition of these carbides is R{sub 2}Fe{sub 17}C{sub {ital x}}, {ital x}{similar to}2.5. The carbides retain the original Th{sub 2}Zn{sub 17} or Th{sub 2}Ni{sub 17} structure with a 6.5% volume expansion over the carbon-free unit cell. For Sm{sub 2}Fe{sub 17}C{sub 2.5}, the Curie temperature is 760 K and the easy magnetization direction is along the {ital c} axis. The anisotropy field of Sm{sub 2}Fe{sub 17}C{sub 2.5} at room temperature is 15{plus minus}0.5 T.

• OSTI ID: 5526700
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 60:1; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ANISOTROPY
CARBIDES
CARBON COMPOUNDS
CHEMICAL COMPOSITION
CRYSTAL STRUCTURE
CURIE POINT
FERROMAGNETISM
IRON COMPOUNDS
MAGNETISM
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SYNTHESIS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE