Abstract
Magnetization and Faraday rotation measurements at 1152 nm have been performed on Ho3Fe5−zAlzO12 (z=0.45) single crystals as a function of temperature and magnetic field oriented along the 3 crystallographic axes [100], [110], and [111] in both experiments. A strong anisotropy is observed at low temperature (T<100 K), although the Faraday susceptibility remains anisotropic until Tcomp=185 K. High field magnetization measurements (H up to 200 kOe) show that the FR anisotropy is mainly of magnetic origin. The results are interpreted on the basis of the Dionne-refined Néel model of ferrimagnetic garnets using a field dependent canting angle.
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