Low energy nuclear spin excitations in Ho metal investigated by high resolution neutron spectroscopy.
J Phys Condens Matter
; 25(15): 156002, 2013 Apr 17.
Article
em En
| MEDLINE
| ID: mdl-23507905
ABSTRACT
We have investigated the low energy excitations in metallic Ho by high resolution neutron spectroscopy. We found at T = 3 K clear inelastic peaks in the energy loss and energy gain sides, along with the central elastic peak. The energy of this low energy excitation, which is 26.59 ± 0.02 µeV at T = 3 K, decreased continuously and became zero at TN ≈ 130 K. By fitting the data in the temperature range 100-127.5 K with a power law we obtained the power-law exponent ß = 0.37 ± 0.02, which agrees with the expected value ß = 0.367 for a three-dimensional Heisenberg model. Thus the energy of the low energy excitations can be associated with the order parameter.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
J Phys Condens Matter
Assunto da revista:
BIOFISICA
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
França