Technique for controlling the properties of magnetic garnet films

Hewitt, B.S.; Pierce, R.D.; Blank, S. L.; Knight, Stephen

doi:10.1109/tmag.1973.1067614

Cited by 43 publications

(4 citation statements)

References 11 publications

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“…Hewitt, et al [24] and Kasai and Ishida [23] report a depletion compensation scheme in which temperature and time are changed a fixed amount with each film grown to keep collapse field and film thickness within specified limits. Sumner and Cox [25] describe a scheme in which the sensitivities of characteristic length and growth rate to changes in temperature are determined for each melt.…”

Section: Development Of Growth Strategiesmentioning

confidence: 99%

Regression Model for LPE Film Property Control

Lewis¹

1978

IBM J. Res. & Dev.

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Empirical regression equations permit the calculation of liquid phase epitaxial (LPE) film properties from film growth parameters. Numerical differentiation of these equations facilitates examination of the sensitivities of film properties to fluctuations in growth conditions and the development of depletion-compensating growth strategies. Regression equations for nominal 3-ILm bubble size CaGe and Ga films have been generated and used for quantitative comparisons of the growth behavior of the two systems. A real time feedback control scheme has been applied to the Ga system resulting in 70 percent of the as-grown films falling within ± 1 percent of the target collapse field.

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Section: Development Of Growth Strategiesmentioning

confidence: 99%

Regression Model for LPE Film Property Control

Lewis¹

1978

IBM J. Res. & Dev.

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“…In general, garnets can have higher bubble speeds than either ferrites or orthoferrites. [15,37] Magnetic Bubble Data Rate and Access Time…”

Section: Figures 2 and 3 Indicate Some Of The Relationships Between Fmentioning

confidence: 99%

Foreign and domestic accomplishments in magnetic bubble device technology

Warner¹,

Calomeris²

1977

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This document assesses the status of magnetic bubble technology as displayed by non-U. S. research and manufacturing facilities. Non-U. S. research and U.S. accomplishments are described while both technical and economic factors are addressed. Magnetic bubble devices are discussed whenever their application could impact future computer system design. Generally the magnetic bubble device can be applied to a computer system as a peripheral mass memory. Magnetic bubble devices are produced from either synthetic garnet or amorphous materials rather than from familiar silicon material. The document contains a significant bibliography to support certain main points which are supplemented by information supplied by the library of the Information Technology Division (ICST-NBS) and from private interviews with various U.S. technical experts.

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“…The defect levels in garnet films can be reduced to a few defects per ern" [38,39]. The minimum defect levels in amorphous films have not yet been determined.…”

Section: Coercivity and Mobilitymentioning

confidence: 99%

Amorphous Materials for Micrometer and Submicrometer Bubble Domain Technology

Bajorek

Kobliska

1976

IBM J. Res. & Dev.

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A review and critique is made of those material and processing issues that pertain to the implementation of micrometer and subrnicrometer bubble devices on amorphous films. Adequate reproducibility and uniformity have been achieved in ternary amorphous films prepared by rf sputtering and their magnetic characteristics are very similar to those of analogous garnet films. Factors that may limit application to the amorphous films include defects and dielectric breakdown in insulating layers, sensitivity to annealing, and larger, but not prohibitive, coercivities. A salient problem common to both garnet and amorphous materials is attainment of sufficiently large values of Q to ensure stable device operation.

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Technique for controlling the properties of magnetic garnet films

Cited by 43 publications

References 11 publications

Regression Model for LPE Film Property Control

Regression Model for LPE Film Property Control

Foreign and domestic accomplishments in magnetic bubble device technology

Amorphous Materials for Micrometer and Submicrometer Bubble Domain Technology

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