Comment on `Ising Pyrochlore Magnets: Low Temperature Properties, ``Ice Rules,'' and Beyond' by R. Siddharthan et al., Phys. Rev. Lett. 83, 1854 (1999)
In this Comment we argue that Ho$_2$Ti$_2$O$_7$ does not exhibit a transition to a partially ordered state unlike what is argued in PRL 83, 1854 (1999), that it exhibits spin ice behavior, and that the experimental specific heat data by Siddharthan et al. can be accounted for in terms of a "dipolar spin ice" model by including an expected contibution from the nuclear Ho spins to the appropriate long-range treatment of the dipole-dipole interactions.
- Pub Date:
- December 1999
- Condensed Matter - Disordered Systems and Neural Networks;
- Condensed Matter - Statistical Mechanics
- Comment on PRL 83, 1854 (1999). 1 PostScript figure included. Submitted to Physical Review Letters. Contact: firstname.lastname@example.org . Comment rejected by PRL. Material herein recast in form of a paper (cond-mat/0101114)