Method and apparatus for generating electron spin reversal in fe

Details Method and apparatus for generating electron spin reversal in fe Method and apparatus for generating electron spin reversal in fe

1981-05-06

1984-01-03

Hecker, Stuart N.

Static information storage and retrieval

Information masking

Polarization

365122, 369110, 350DIG1, G11C 1304, G11C 1306

Patent

active

044245807

ABSTRACT:
Methods and apparatus for reversibly altering magnetic characteristics or domains of ferrimagnetic material by photomagnetic means, particularly by electron spin reversal (spin-flip). Photomagnetic electron spin reversal and inversion creating cylinder domains and their surrounding toroid domains of oppositely directed intrinsic magnetization in ferrimagnetic thin film material are achieved by means of signal modulated circularly polarized laser radiation. Three different stable conditions are detectable. The invention has particular application as a fundamentally new aproach to erasable digital data storage, providing means and methods for photomagnetically alterable and erasable data storage which can be detected by observing polarization of optical radiation directed through the ferrimagnetic material.

REFERENCES:
patent: 3228015 (1966-01-01), Miyata et al.
patent: 3624622 (1971-11-01), Chen
patent: 3701133 (1972-10-01), Smaller et al.
Porter et al., "Transparent Ferromagnetic Light Modulator Using Yttrium Iron Garnet," Journal of Appl. Phys., vol. 29, No. 3, 3/58, pp. 495-496.
Krumme et al., "New Magnetor-Optic Memory Concept Based on Compensation Wall Domains," Appl. Phys. Lett., vol. 23, No 10, 11/15/73, pp. 576-578, S4315 0026.
Kurtzig et al., "Reorientation and Curie Point Writing in Orthoferrites," Journal of Applied Physics, vol. 42, No. 4, 3/15/71, pp. 1804-1805, S1510 0033.
Dillon, "Optical Properties of Several Ferrimagnetic Garnets, Journal of Applied Physics, vol. 29, No. 3, 3/58, pp. 539-541.
Ahn, "Induced Anisotropy in Magneto-Optic Films, " IBM Tech. Disc. Bul., vol. 11, No. 3, 8/68, pp. 326-327.

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