Crystal-field interaction in the pyrochlore magnet Ho2Ti2O7

Citation
S. Rosenkranz et al., Crystal-field interaction in the pyrochlore magnet Ho2Ti2O7, J APPL PHYS, 87(9), 2000, pp. 5914-5916
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF APPLIED PHYSICS
ISSN journal
00218979 → ACNP
Volume
87
Issue
9
Year of publication
2000
Part
3
Pages
5914 - 5916
Database
ISI
SICI code
0021-8979(20000501)87:9<5914:CIITPM>2.0.ZU;2-X
Abstract
Neutron time-of-flight spectroscopy has been employed to study the crystal- field interaction in the pyrochlore titanate Ho2Ti2O7. The crystal-field pa rameters and corresponding energy-level scheme have been determined from a profile fit to the observed neutron spectra. The ground state is a well sep arated E-g doublet with a strong Ising-like anisotropy, which can give rise to frustration in the pyrochlore lattice. Using the crystal-field paramete rs determined for the Ho compound as an estimate of the crystal-field poten tial in other pyrochlore magnets, we also find the Ising type behavior for Dy. In contrast, the almost planar anisotropy found for Er and Yb prevents frustration, because of the continuous range of possible spin orientations in this case. (C) 2000 American Institute of Physics. [S0021- 8979(00)22908 -3].