Abstract
The field dependent magnetocrystalline anisotropy and magnetization of various rare earth garnets were measured in magnetic fields up to 7 tesla (70 kOe). It was observed that the anisotropy of the heavy rare earth ions in ytrium-iron garnet (YIG) obeys the single-ion renormalization law, whereas that of the light rare earth ions does not. From this it was concluded that the anisotropy of the heavy rare earth ions is predominantly due to crystalline electric field (CEF), but the exchange anisotropy is also important for the light rare earth ions.
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