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Title: Locally-controlled domain microstructures in bismuth-iron-garnet films for magneto-optical current sensors.

Abstract

Abstract not provided.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1142033
Report Number(s):
SAND2009-4793C
507881
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the SPIE Optics + Photonics held August 2-6, 2009 in San Diego, CA.
Country of Publication:
United States
Language:
English

Citation Formats

Cich, Michael Joseph, Mukherjee, Sayan, Keeler, Gordon Arthur, Nordquist, Christopher, and Hsu, Alan Y. Locally-controlled domain microstructures in bismuth-iron-garnet films for magneto-optical current sensors.. United States: N. p., 2009. Web.
Cich, Michael Joseph, Mukherjee, Sayan, Keeler, Gordon Arthur, Nordquist, Christopher, & Hsu, Alan Y. Locally-controlled domain microstructures in bismuth-iron-garnet films for magneto-optical current sensors.. United States.
Cich, Michael Joseph, Mukherjee, Sayan, Keeler, Gordon Arthur, Nordquist, Christopher, and Hsu, Alan Y. Sat . "Locally-controlled domain microstructures in bismuth-iron-garnet films for magneto-optical current sensors.". United States. doi:. https://www.osti.gov/servlets/purl/1142033.
@article{osti_1142033,
title = {Locally-controlled domain microstructures in bismuth-iron-garnet films for magneto-optical current sensors.},
author = {Cich, Michael Joseph and Mukherjee, Sayan and Keeler, Gordon Arthur and Nordquist, Christopher and Hsu, Alan Y.},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Aug 01 00:00:00 EDT 2009},
month = {Sat Aug 01 00:00:00 EDT 2009}
}

Conference:
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  • The Bi{sub x}Ce{sub 3-x}Fe{sub 5}O{sub 12} (x = 0.8) epitaxial films of high quality were grown by means of pulsed laser deposition on paramagnetic substrates of Gadolinium Gallium Garnet. We study the modifications of substitutions in the parent garnet Y{sub 3}Fe{sub 5}O{sub 12} that produces a higher magneto-optical response at communication wavelengths. These films displayed a strong in plane textures which are treated in argon as well as reduced atmosphere conditions. The elemental constituents of these films were confirmed by energy dispersive-X ray analysis, elastic recoil detection system, Rutherford backscattering spectroscopy, and X-ray photoelectron spectroscopy measurements. The transmittance spectra weremore » measured and found these films exhibit good transmittance values. The transmittance-spectra were fitted with the theoretical model and the optical constants such as refractive index and absorption edge were evaluated. The highest (negative) Faraday rotation was found for these films treated in the environment of Ar + H{sub 2}. A density matrix theory has been developed for the Faraday rotation and a good agreement between the theory and experiment is found. These epitaxial garnet films can be used in a wide range of frequencies from visible to infrared spectra making them ideal for many magneto optical applications. Therefore, these films may overcome many issues in fabricating all optical isolators which is the viable solution for integrated photonics.« less
  • Abstract not provided.
  • Abstract not provided.
  • The effects of the sputtering conditions on the magnetic and magneto-optic properties of bismuth substituted gadolinium iron garnet (GdIG) films are studied. GdIG films with uniaxial perpendicular anisotropy and room temperature coercivities greater than 1 kOe have been deposited on glass substrates by rf magnetron sputtering. These films have Faraday rotations between 0.6 */{mu}m and 1.3 */{mu}/m and temperature dependent coercivities similar to rare earth-transition metal alloys. Increasing the rf power or argon bleeding pressure results in an increase in the compensation temperature (T/sub comp/) with little change in the Curie temperature (T/sub c/).
  • Faraday rotation and ellipticity were measured at room temperature in the photon energy range of 1.5{endash}4.2 eV on Y{sub 3{minus}x}Pr{sub x}Fe{sub 5}O{sub 12} (x=0{endash}2.0) epitaxial films grown by rf sputtering. The Pr{sup 3+} substitution induced negative rotation and ellipticity which satisfy a paramagnetic dispersion relation caused by an electronic transition centered at 3.0 eV. The maximum value of the Pr{sup 3+} contribution was {minus}2.5{times}10{sup 4}deg/cm in rotation and {minus}4.1{times}10{sup 4}deg/cm in ellipticity for x=2.0. Optical absorption measurements showed that this is a new transition induced by the coexistence of Pr{sup 3+} and Fe{sup 3+}, and it is neither 4f{endash}5d intra-atomicmore » transition nor 4f{endash}4f transition originating from Pr ions as previously supposed. {copyright} {ital 1997 American Institute of Physics.}« less