Study of temperature dependence of spin order in the Si-substituted YIG system by Moessbauer effect and magnetization measurements

Spin arrangement at higher temperatures was studied using the Moessbauer effect and the magnetic moment measurement in the Si-substituted Y/G system. Measurements were conducted in a wide temperature range for x = 0.82, 1.2, and 1.5. The information of the spin arrangement was obtained by the analysis of temperature dependence of angular relations between the direction of magnetic effective field Hsub(eff)sup(i) (i = a, d) and that of the EFG axes. A second method was the computation of the net magnetic moment from the values of experimental and magnetic effective fields Hsub(eff)sup(a), Hsub(eff)sup(i), this for temperatures different from OK. Temperature dependence data are shown in graphs. (L.O.)