Magnetic garnet film epitaxy on nonsingular faces (abstract)
- Moscow State Institute of Steel and Alloys, Leninsky Prospect 4, Moscow, 117936 (Russia)
The single crystal films of magnetic garnets are widely used in various microelectronics devices. The yttrium{endash}iron and bismuth{endash}gallium-substituted magnetic garnet films were grown by liquid phase epitaxy from supercooled solutions on the basis PbO+B{sub 2}O{sub 3}. As substrates for films the gadolinium{endash}gallium garnet wafers crystallographically oriented in the range from (111)- to (110)-directions are used. In experiments such growth process parameters as supercooling temperature and angular velocity of substrate rotation were varied too. The parameters to be examined were thickness, growth rate, crystallografic, magnetic, and magnetooptical characteristics of the as-grown films. To analyze the growth process kinetics it was developed the model, including the terms (supersaturation {ital C}{sub {ital L}}{minus}{ital C}{sub {ital E}}) of the first and second orders for description of surface crystallization reaction. The following expression was derived for epitaxial growth rate: {ital f}={ital D}/{rho}{delta}[({ital C}{sub {ital L}}{minus}{ital C}{sub {ital E}})+{ital k}{sub 1}{delta}+{ital D}/2{ital k}{sub 2}{delta}{minus}{radical} ({ital k}{sub 1}{delta}+{ital D}){sup 2}+4{ital k}{sub 2}{delta}{ital D}({ital C}{sub {ital L}}{minus}{ital C}{sub {ital E}})/2{ital k}{sub 2}{delta}], where {ital D} is diffusion coefficient, {delta} is diffusion boundary layer thickness on the solid{endash}liquid interface, {rho} is film density, {ital C}{sub {ital L}} is concentration of garnet phase in the melted solution, {ital C}{sub {ital E}} is equilibrium concentration, {ital k}{sub {ital m}} is surface reaction constant (kinetic coefficient) of order {ital m} in {ital D}{partial_derivative}{ital C}/{partial_derivative}{ital x}(0,{ital t})={ital k}{sub {ital m}}[{ital C}(0,{ital t}){minus}{ital C}{sub {ital E}}]{sup {ital m}}. (Abstract Truncated)
- OSTI ID:
- 280061
- Report Number(s):
- CONF-951101-; ISSN 0021-8979; TRN: 9608M0117
- Journal Information:
- Journal of Applied Physics, Vol. 79, Issue 8; Conference: 40. conference on magnetism and magnetic materials, Philadelphia, PA (United States), 6-9 Nov 1995; Other Information: PBD: Apr 1996
- Country of Publication:
- United States
- Language:
- English
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