Magnetic ordering and spin-reorientation transitions in TbCo{sub 3}B{sub 2}
- Nuclear Research Centre-Negev, P.O. Box 9001, Beer-Sheva 84190 (Israel) and Department of Physics, Ben-Gurion University, P.O. Box 653, Beer-Sheva 84105 (Israel)
The magnetic structure of the compound TbCo{sub 3}B{sub 2} has been studied in the temperature range 1.5 K{<=}T{<=}300 K by means of neutron powder diffraction, magnetization, magnetic ac susceptibility, and heat capacity measurements. The compound is of hexagonal symmetry and is paramagnetic at 300 K, undergoes a magnetic Co-Co ordering transition at {approx}170 K, and a second magnetic Tb-Tb ordering transition at {approx}30 K. The latter induces a spin-reorientation transition, in which the magnetic axis rotates from the c axis toward the basal plane. Below this transition a symmetry decrease ({gamma} magnetostriction) sets in, leading to an orthorhombic distortion of the crystal lattice. The crystal and magnetic structures and interactions and their evolution with temperature are discussed using a microscopic physical model.
- OSTI ID:
- 20719133
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 72, Issue 2; Other Information: DOI: 10.1103/PhysRevB.72.024446; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BORON ALLOYS
COBALT ALLOYS
CRYSTAL LATTICES
CRYSTALS
MAGNETIC SUSCEPTIBILITY
MAGNETIZATION
MAGNETOSTRICTION
NEUTRON DIFFRACTION
PARAMAGNETISM
SPECIFIC HEAT
SPIN
SYMMETRY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TERBIUM ALLOYS