Document type:
Zeitschriftenaufsatz
Author(s):
B̈oni, P.; Hennion, M.; Martínez, J. L.
Title:
Magnon Dispersion of the Dipolar Ferromagnet {{EuS}} near the Zone Center
Abstract:
The dispersion of the spin waves in EuS has been investigated by means of neutron scattering. In zero field and at small momentum transfer q, the energy $\Elzxh\omega$q of the spin waves is proportional to q in agreement with the predictions of spin-wave theory that includes demagnetization effects. By application of a magnetic field H$\parallel$q, the spin waves attain a finite mass, i.e., a gap is induced and $\Elzxh\omega$q becomes proportional to q2. Using polarization analysis we show that...    »

Journal title:
Physical Review B
Year:
1995
Journal volume:
52
Month:
oct
Journal issue:
14
Pages contribution:
10142
Fulltext / DOI: