Ferromagnetism in lithium holmium fluoride-LiHoF4. II. Optical and spectroscopic measurements
- 7 December 1975
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 8 (23) , 4089-4095
- https://doi.org/10.1088/0022-3719/8/23/022
Abstract
For pt.I see ibid., vol.8, p.4083 (1975). The absorption spectrum of LiHoF4 has been studied, and the lowest-lying crystal-field levels of Ho3+ in LiHoF4 have been determined. The ground state is a crystal-field doublet with a uniaxial g-factor of gc=13.8+or-0.5. The spectroscopic measurements and the direct optical observation of domain structure both indicate that LiHoF4 orders ferromagnetically parallel to the crystallographic c-axis at Tc=1.52+or-0.01K. The ordering is caused by magnetic dipole interaction, and the formation of domains of small demagnetizing factor is essential.Keywords
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