Structural and magnetic properties of Tb6Fe1-xCoxBi2 (0 x 0.375) compounds

Journal Article · Sat Jan 01 04:00:00 EST 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3565515· OSTI ID:1014241

Jia, Lin ^[1]; Koehler, Michael R. ^[2]; McCarthy, David ^[2]; McGuire, Michael A ^[1]; Keepens, V. ^[2]

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1. ORNL
2. University of Tennessee, Knoxville (UTK)

Tb{sub 6}Fe{sub 1-x}Co{sub x}Bi{sub 2} (x = 0, 0.125, 0.250, 0.375) compounds have been synthesized, and the structural and magnetic properties are reported. All of the compounds crystallize in the hexagonal Zr{sub 6}CoAs{sub 2}-type structure at room temperature, but low temperature x-ray diffraction measurements on the Co-doped samples Tb{sub 6}Fe{sub 0.750}Co{sub 0.250}Bi{sub 2} and Tb{sub 6}Fe{sub 0.625}Co{sub 0.375}Bi{sub 2} show a splitting of the Bragg peaks, indicating a symmetry lowering structural phase transition at {approx}40 K. Two magnetic transitions are observed, with T{sub C1} - 250 K and T{sub C2} - 70 K. While the high temperature transition corresponds to the ferromagnetic ordering of the Tb moments, the lower transition is most likely linked to the structural transition.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1014241
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 109; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BRAGG CURVE
MAGNETIC PROPERTIES
SYMMETRY
X-RAY DIFFRACTION