Jw. Boyle et al., INVESTIGATIONS OF EPITAXIAL GA-YIG(111) FILMS BY BRILLOUIN LIGHT-SCATTERING AND MICROWAVE SPECTROSCOPY, Journal de physique. IV, 7(C1), 1997, pp. 497-498
Brillouin light scattering and microwave spectroscopy measurements hav
e enabled the room temperature magnetic characteristics of five Y3Fe5-
xGaxO12 (111) films with 0 less than or equal to x less than or equal
to 0.73 to be obtained. The film thicknesses ranged from 7 to 10 micro
ns. The BLS measurements gave stiffness factors ranging from 5.52 to 8
.77.10(-9) Oe.cm(2). This variation is attributed to the occupation by
Ga atoms of the A and D sites causing a decrease in J(ad). The values
of 4 pi M-s and gamma deduced were in good agreement with those obtai
ned by microwave spectroscopy which examined the frequencies of the MS
BVW and MSFVW excitations generated by a periodic array of microstrips
. 4 pi M-s decreased from 1.740 kG for x = 0 to 0.645 kG for x = 0.73.
A cubic anisotropy field H-K of similar to 45 Oe and first and second
order uniaxial anisotropy fields H-u1 and H-u2 of similar to-70 and 5
0 Oe respectively were obtained.