/sup 57/Fe-YIG: Narrow x-ray linewidth epitaxial layers on Gd/sub 3/Ga/sub 5/O/sub 12/

Journal Article · Fri Apr 15 04:00:00 EDT 1988 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.340617· OSTI ID:5390105

Gualtieri, D M; Lavender, W; Ruby, S L

Epitaxial layers of 81% /sup 57/Fe-enriched Y/sub 3/Fe/sub 5/O/sub 12/ were grown on thick, (100)-oriented substrates of Gd/sub 3/Ga/sub 5/O/sub 12/ for experiments in resonant nuclear diffraction. Layers up to 10 ..mu..m thick were grown on each side of 32-mm-diam, 5-mm-thick wafers using techniques common for the growth of magnetic bubble materials, but with the use of a PbO-V/sub 2/O/sub 5/ flux in place of the usual PbO-B/sub 2/O/sub 3/ flux. The PbO-V/sub 2/O/sub 5/ flux offers a lower solubility of YIG which allows a reduction in the amount of /sup 57/Fe oxide required for layer growth. Thick substrates were used to reduce possible bowing from lattice constant mismatch. Lead incorporation onto yttrium lattice sites was controlled by adjusting the growth temperature, and this allowed a close lattice constant match between the layers and the substrate. Layer thickness was essentially uniform across the layer diameter with the edges 5% thicker than the center. Curie temperature and Faraday rotation measurements of the equivalent (111)-oriented material indicate as a formula unit (Y/sub 2.96/Pb/sub 0.04/)Fe/sub 3/(Fe/sub 1.94/Y/sub 0.06/)O/sub 12/. YIG/YIG double-crystal diffraction by tungsten L-..gamma../sub 1/ irradiation of a 5 x 7-mm rectangular area of the first crystal gave a composite linewidth of 13 arcsec for the )400) reflection. This same linewidth was observed in synchrotron illumination of the central 80% of the area of the first layer. The possibility of linewidth reduction in this material is discussed.

• Research Organization: Electronic Materials and Devices Laboratory, Allied-Signal Incorporated, P. O. Box 1021-R, Morristown, New Jersey 07960
• OSTI ID: 5390105
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 63:8; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL GROWTH
CURIE POINT
DIFFRACTION
DOMAIN STRUCTURE
EPITAXY
FARADAY EFFECT
GADOLINIUM COMPOUNDS
GADOLINIUM OXIDES
GALLIUM COMPOUNDS
GALLIUM OXIDES
IRON COMPOUNDS
IRON OXIDES
LAYERS
LINE WIDTHS
LIQUID PHASE EPITAXY
MAGNETIC MATERIALS
MATERIALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
SUBSTRATES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES