SPIN-WAVE CONTRIBUTION TO THE SPECIFIC HEAT OF EuS

Journal Article · Thu Nov 01 04:00:00 EST 1962 · Phys. Rev. Letters

DOI:https://doi.org/10.1103/PhysRevLett.9.376· OSTI ID:4735141

McCollum, Jr, D C; Callaway, J

An indirect exchange coupling mechanism has been proposed as a possible explanation of the nature of the ferromagnetic exchange coupling of EuS. Specific hent measuremerts on EuS were made and the results were compared with the predictions of spin-wave theory. The agreemert between theory and experiment is very good in the determination of the T/sup 5/2/ term in the spin-wave specific heat and in the relation between the exchange integral and the Curie temperature. It is concluded that the spin system in EuS can be described at least phenomenologically by a simple Heisenberg spin Hamiltonian. (H.D.R.)

• Research Organization: Univ. of California, Riverside
• NSA Number: NSA-17-008078
• OSTI ID: 4735141
• Journal Information: Phys. Rev. Letters, Journal Name: Phys. Rev. Letters Vol. Vol: 9
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMISTRY
DIFFERENTIAL EQUATIONS
EUROPIUM SULFIDES
FERROMAGNETIC MATERIALS
HAMILTONIAN
MEASURED VALUES
SPECIFIC HEAT
SPIN
TEMPERATURE