Characterization of epitaxial (Y,Bi)3(Fe,Ga)5O12 thin films grown by metal-organic decomposition method

Epitaxial (Y,Bi)3(Fe,Ga)5O12 garnet thin films have been prepared on Gd3Ga5O12 (111) substrates by a metal-organic decomposition (MOD) method using carboxylic acids. The chemical compositions of the films prepared in this study are Y2BiFe5O12 (YBFO), Y3Fe4GaO12 (YFGO), and Y2BiFe4GaO12 (YBFGO). Epitaxy of these films was confirmed by x-ray diffraction and Rutherford backscattering (RBS) measurements. Full width of half maximum values of the 444 diffraction peaks of YFGO and YBFGO were 0.4° and 0.04°, respectively. RBS channeling was clearly observed for the YFGO film with a minimum yield χmin along the [111] direction of ∼7.5%. These garnet films could also be reproducibly obtained by the MOD method without any deterioration in the MOD solutions over two years.

[1]  H. I. Ralph,et al.  Garnets with high magnetooptic figures of merit in the visible region , 1973 .

[2]  Mark H. Kryder,et al.  Deposition of garnet thin films by metallo-organic decomposition (MOD) , 1994 .

[3]  K. Yamaguchi,et al.  Enhancement of magneto-optical Faraday rotation by bismuth substitution in bismuth and aluminum substituted yttrium-iron-garnet single-crystal films grown by coating gels , 1992 .

[4]  J. Robertson,et al.  Magneto-optic spectra and the dielectric tensor elements of bismuth-substituted iron garnets at photon energies between 2.2-5.2 eV , 1975 .

[5]  P. Hansen,et al.  Magnetic and magneto‐optic properties of praseodymium‐ and bismuth‐substituted yttrium iron garnet films , 1986 .

[6]  Koji Matsumoto,et al.  Preparation of Polycrystalline Bismuth and Aluminum Substituted Yttrium-Iron Garnet Films by Repetitive Gel Coating on Glass Substrates , 1991 .

[7]  C. Graham,et al.  Magnetism and magnetic materials, 1971 , 1972 .

[8]  P. E. Goa,et al.  Magneto-optical imaging setup for single vortex observation , 2003 .

[9]  壽崇 藤井,et al.  ゾル·ゲル法による Bi 置換 YIG の作製と磁気持性 , 1990 .

[10]  C. G. Kim,et al.  Ion channeling effect of In dopant in semi‐insulating GaAs , 1986 .

[11]  正紀 阿部,et al.  熱分解法により作製されたBi, Ga(またはAl)置換ガーネット膜の磁気的，磁気光学的性質 , 1986 .

[12]  M. Abe,et al.  RF-Sputtering of Highly Bi-Substituted Garnet Films on Glass Substrates for Magneto-Optic Memory , 1985, IEEE Translation Journal on Magnetics in Japan.