RELAXATION OF PHONONS IN HEMATITE

Authors
ANDRIENKO AV PODDYAKOV LV
Citation
Av. Andrienko et Lv. Poddyakov, RELAXATION OF PHONONS IN HEMATITE, Solid state communications, 89(11), 1994, pp. 907-911
Citations number
11
Categorie Soggetti
Physics, Condensed Matter
Journal title
Solid state communications → ACNP
ISSN journal
00381098
Volume
89
Issue
11
Year of publication
1994
Pages
907 - 911
Database
ISI
SICI code
0038-1098(1994)89:11<907:ROPIH>2.0.ZU;2-K
Abstract
Relaxation rate of phonons was investigated in antiferromagnet alphaFe 2O3. Phonons were parametrically excited by microwave magnetic field i n helix resonator at pumping frequencies nu(p)=0.7-1.5 GHz. The relaxa tion rate of phonons was calculated using the threshold amplitude of t he microwave field of parallel pumping. The phonon relaxation was foun d to be weakly dependent on the magnetic field and approximately propo rtional to nu(p)2.