SPIN DYNAMICS IN RENI5 FERROMAGNETS BY MU-SR MEASUREMENTS

Authors
GUBBENS PCM MOOLENAAR AA DEREOTIER PD YAOUANC A KAYZEL F FRANSE JJM PROKES K SNEL CE BONVILLE P HODGES JA IMBERT P PARI P
Citation
Pcm. Gubbens et al., SPIN DYNAMICS IN RENI5 FERROMAGNETS BY MU-SR MEASUREMENTS, Hyperfine interactions, 85(1-4), 1994, pp. 239-244
Citations number
17
Categorie Soggetti
Physics, Atomic, Molecular & Chemical","Physics, Nuclear","Physics, Condensed Matter
Journal title
Hyperfine interactions → ACNP
ISSN journal
03043843
Volume
85
Issue
1-4
Year of publication
1994
Pages
239 - 244
Database
ISI
SICI code
0304-3843(1994)85:1-4<239:SDIRFB>2.0.ZU;2-V
Abstract
We report a zero field muSR study of single crystals of the RENi5 ferr omagnets where RE=Gd, Er, Dy or Tm. Our work points out the strong inf luence of the crystal electric field on the rare earth total momentum dynamics: whereas the spin-lattice relaxation process below T(C) is co ntrolled by a two magnon mechanism for a weakly anisotropic magnet (Gd Ni5), the phonons drive the relaxation for a strongly anisotropic magn et such as Er-Ni5. For TmNi5 a comparison is made between the fluctuat ion time measured by muSR and Tm-169 Mossbauer spectroscopy.