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Title: Crystal-field interaction in the pyrochlore magnet Ho{sub 2}Ti{sub 2}O{sub 7}

Abstract

Neutron time-of-flight spectroscopy has been employed to study the crystal-field interaction in the pyrochlore titanate Ho{sub 2}Ti{sub 2}O{sub 7}. The crystal-field parameters and corresponding energy-level scheme have been determined from a profile fit to the observed neutron spectra. The ground state is a well separated E{sub g} doublet with a strong Ising-like anisotropy, which can give rise to frustration in the pyrochlore lattice. Using the crystal-field parameters determined for the Ho compound as an estimate of the crystal-field potential 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.

Authors:
 [1];  [2];  [3];  [3];  [4];  [4]
  1. Materials Science Division, Argonne National Laboratory, Argonne, Ilinois 60439 (United States)
  2. Bell Laboratories, Lucent Technologies, 600 Mountain Avenue, Murray Hill, New Jersey 07974 (United States)
  3. Chemistry Department, Princeton University, Princeton, New Jersey 08540 (United States)
  4. Department of Physics, Indian Institute of Science, Bangalore 560012, (India)
Publication Date:
OSTI Identifier:
20216257
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 87; Journal Issue: 9; Other Information: PBD: 1 May 2000; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; HOLMIUM OXIDES; TITANIUM OXIDES; PYROCHLORE; PERMANENT MAGNETS; CRYSTAL FIELD; NEUTRON SPECTROSCOPY; ENERGY LEVELS; GROUND STATES; ISING MODEL; EXPERIMENTAL DATA

Citation Formats

Rosenkranz, S., Ramirez, A. P., Hayashi, A., Cava, R. J., Siddharthan, R., and Shastry, B. S. Crystal-field interaction in the pyrochlore magnet Ho{sub 2}Ti{sub 2}O{sub 7}. United States: N. p., 2000. Web. doi:10.1063/1.372565.
Rosenkranz, S., Ramirez, A. P., Hayashi, A., Cava, R. J., Siddharthan, R., & Shastry, B. S. Crystal-field interaction in the pyrochlore magnet Ho{sub 2}Ti{sub 2}O{sub 7}. United States. doi:10.1063/1.372565.
Rosenkranz, S., Ramirez, A. P., Hayashi, A., Cava, R. J., Siddharthan, R., and Shastry, B. S. Mon . "Crystal-field interaction in the pyrochlore magnet Ho{sub 2}Ti{sub 2}O{sub 7}". United States. doi:10.1063/1.372565.
@article{osti_20216257,
title = {Crystal-field interaction in the pyrochlore magnet Ho{sub 2}Ti{sub 2}O{sub 7}},
author = {Rosenkranz, S. and Ramirez, A. P. and Hayashi, A. and Cava, R. J. and Siddharthan, R. and Shastry, B. S.},
abstractNote = {Neutron time-of-flight spectroscopy has been employed to study the crystal-field interaction in the pyrochlore titanate Ho{sub 2}Ti{sub 2}O{sub 7}. The crystal-field parameters and corresponding energy-level scheme have been determined from a profile fit to the observed neutron spectra. The ground state is a well separated E{sub g} doublet with a strong Ising-like anisotropy, which can give rise to frustration in the pyrochlore lattice. Using the crystal-field parameters determined for the Ho compound as an estimate of the crystal-field potential 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.},
doi = {10.1063/1.372565},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 9,
volume = 87,
place = {United States},
year = {2000},
month = {5}
}