Title :
Magnetic and magneto-optical properties of Ga doped EuIG single crystals
Author :
Ostoréro, J. ; Escorne, M.
Author_Institution :
Lab. de Magnetisme et Mater. Magnetiques, CNRS, Meudon, France
fDate :
11/1/1991 12:00:00 AM
Abstract :
Magnetization and Faraday rotation measurements at 1150 nm have been performed on Eu3Fe5-zGazO12 single crystals (0⩽z<0.9) quenched at two temperatures, Tq=1200 and 1473 K, as a function of temperature and magnetic field. The heat treatments, which have a greater influence on magnetization than Faraday rotation, shift the magnetic compensation temperature towards lower T when T q increases. The magnetization results are interpreted on the basis of an induced moment of Eu3+ in agreement with W.P. Wolf and J.H. Van Vleck, and G.F. Dionne´s model of ferrimagnetic garnets, assuming that the distribution of Ga on the different sites is the same as YIG:Ga crystals. The contribution of Eu to Faraday rotation in EuIG shows that the gyroelectric magnetooptical coefficient of the model of W.A. Crossley et al., is a linear function of temperature for T>50 K (gEu constant)
Keywords :
Faraday effect; europium compounds; ferrimagnetic properties of substances; garnets; heat treatment; magnetisation; magneto-optical effects; 1150 nm; 1200 K; 1473 K; Eu3Fe5-zGazO12; Faraday rotation measurements; ferrimagnetic garnets; gyroelectric magnetooptical coefficient; heat treatments; linear function; magnetic compensation temperature; magnetic field; magnetization; magneto-optical properties; model; Crystals; Heat treatment; Iron; Magnetic fields; Magnetic properties; Magnetization; Performance evaluation; Q measurement; Rotation measurement; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on