Neutron-scattering study of the magnetic excitations of thulium metal

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.3188· OSTI ID:5845841

Fernandez-Baca, J A; Nicklow, R M ^[1]; Tun, Z ^[2]; Rhyne, J J ^[3]

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1. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6393 (USA)
2. Atomic Energy of Canada Limited, Chalk River Nuclear Laboratories, Chalk River, Ontario (Canada)
3. National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (USA)

We have performed neutron-scattering experiments to study the magnetic excitations of Tm in its low-temperature ferrimagnetic-antiphase-domain (FAD) phase. Our measurements confirm our earlier finding that the excitation spectrum of Tm in its FAD phase consists of one magnon mode with limited dispersion (8.3--9.6 meV). This result suggests that the Hamiltonian is dominated by the crystal-field-anisotropy energy and that the exchange interaction is relatively weak. Two additional lower-energy excitations have also been observed, and they have been identified as originating from magnetovibrational scattering from the TA phonon.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5845841
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:4; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
COHERENT SCATTERING
DIFFRACTION
DISPERSION RELATIONS
ELEMENTS
FERROMAGNETIC MATERIALS
MAGNETIC MATERIALS
MAGNONS
MATERIALS
METALS
NEUTRON DIFFRACTION
PHONONS
POLARIZATION
QUASI PARTICLES
RARE EARTHS
SCATTERING
THULIUM