Numéro
J. Phys. IV France
Volume 07, Numéro C1, Mars 1997
7th INTERNATIONAL CONFERENCE ON FERRITES
Page(s) C1-497 - C1-498
DOI https://doi.org/10.1051/jp4:19971203
7th INTERNATIONAL CONFERENCE ON FERRITES

J. Phys. IV France 07 (1997) C1-497-C1-498

DOI: 10.1051/jp4:19971203

Investigations of Epitaxial Ga : YIG(111) Films by Brillouin Light Scattering and Microwave Spectroscopy

J.W. Boyle1, J.G. Booth1, A.D. Boardman1, I. Zavislyak2, V. Bobkov2 and V. Romanyuk2

1  Physics Department, University of Salford, Salford M5 4WT, U.K.
2  Radiophysics Department, Taras Shevchenko University, Kiev, 252017, Ukraine


Abstract
Brillouin light scattering and microwave spectroscopy measurements have enabled the room temperature magnetic characteristics of five Y3Fe5-xGaxO12(111) films with 0≤x≤0.73 to be obtained. The film thicknesses ranged from 7 to 10 microns. The BLS measurements gave stiffness factors ranging from 5.52 to 8.77.10-9 Oe.cm2. This variation is attributed to the occupation by Ga atoms of the A and D sites causing a decrease in Jad. The values of 4πMs, and γ deduced were in good agreement with those obtained by microwave spectroscopy which examined the frequencies of the MSBVW and MSFVW excitations generated by a periodic array of microstrips. 4πMs decreased from 1.740 kG for x = 0 to 0.645 kG for x = 0.73. A cubic anisotropy field HK of ~45 Oe and first and second order uniaxial anisotropy fields Hu1 and Hu2 of ~-70 and 50 Oe respectively were obtained.



© EDP Sciences 1997