Crystal-field interaction in the pyrochlore magnet $Ho_2Ti_2O_7$

Rosenkranz, S and Ramirez, AP and Hayashi, A and Cava, RJ and Siddharthan, R and Shastry, BS (2000) Crystal-field interaction in the pyrochlore magnet $Ho_2Ti_2O_7$. In: Journal of Applied Physics, 87 (9). pp. 5914-5916.

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Abstract

Neutron time-of-flight spectroscopy has been employed to study the crystal-field interaction in the pyrochlore titanate $Ho_2Ti_2O_7$. 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 $E_g$ 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.

Item Type:	Journal Article
Publication:	Journal of Applied Physics
Publisher:	American Institute of Physics
Additional Information:	Copyright of this article belongs to American Institute of Physics.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	13 Aug 2008
Last Modified:	19 Sep 2010 04:49
URI:	http://eprints.iisc.ac.in/id/eprint/15586

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