Magneto-Optic Interactions.
Abstract
The most promising approaches for bubble domain sensing are (1) magneto-resistive detectors (MRD), and (2) magneto-optical detectors (MOD). These two types of detectors are the subject of the report. For MOD a garnet film with high Faraday Rotation (FR) is desirable. Data are presented showing the effect of Bi-doping on the FR of YIG. Data are also presented on the FR of a large number of other rare earth iron garnets. The data indicate that a lens-less all-solid-state MOD is feasible using an edge-emitting light-emitting diode of GaAs:Al and a bubble film of Bi3-2xCa2xVxFe5-x012 (x approximately 1.1) grown on a nonmagnetic garnet substrate such as Sm3Ga5012:In, or a Bi-containing LPE film on a Gd3Ga5012 substrate. For a MRD, the advantageous design is one that utilizes a chevron expander with the detector formed by interconnecting the chevrons in a column to form a staggered continuous circuit. The permalloy thickness for the detector should be the same as that for the propagation elements. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1973
- Accession Number
- AD0912785
Entities
People
- Aline L. Akselrad
- John L. Druguet
- Lubomyr S. Onyshkevych
- Rabah Shahbender
Organizations
- Sarnoff Corporation