THEORY OF THE SPIN WAVE CONTRIBUTION TO THE SPECIFIC HEAT OF DYSPROSIUM

Journal Article · Sat Dec 01 04:00:00 EST 1962 · Proc. Phys. Soc. (London)

DOI:https://doi.org/10.1088/0370-1328/80/6/303· OSTI ID:4752971

Cooper, B R

A theory is presented for the spin wave contribution to the specific heat of dysprosium below the temperature of transition from ferromagnetic to spiral spin arrangement. The central feature of the theory is the nature of the spin wave spectrum. There is a substantial energy gap (E/sub g/) at the minimum of the spectrum. This is caused by the large magnetocrystalline anisotropy energies present, and is of magnitude 20 to 30 deg K. The transition from ferromagnet to spiral implies a spectrum that is nearly flat, for wave vectors in the direction of the hexagonal axis, for an appreci

• Research Organization: Atomic Energy Research Establishment, Harwell, Berks, Eng.
• NSA Number: NSA-17-013163
• OSTI ID: 4752971
• Journal Information: Proc. Phys. Soc. (London), Journal Name: Proc. Phys. Soc. (London) Vol. Vol: 80
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANISOTROPY
BRILLOUIN ZONE
CONFIGURATION
CRYSTALS
DYSPROSIUM
ENERGY
ENERGY LEVELS
FERROMAGNETIC MATERIALS
LATTICES
LOW TEMPERATURE
PHYSICS
SPECIFIC HEAT
SPECTRA
SPIN
SPIN WAVES
VECTORS
ZONES