Microscopic observations of domain collapse in TbFeCo-based magneto-optic recording

Romel D. Gomez; A. R. Kratz; Isaak D. Mayergoyz; Edward R. Burke

doi:10.1117/12.218748

8 September 1995 Microscopic observations of domain collapse in TbFeCo-based magneto-optic recording

Romel D. Gomez, A. R. Kratz, Isaak D. Mayergoyz, Edward R. Burke

Proceedings Volume 2514, Optical Data Storage '95; (1995) https://doi.org/10.1117/12.218748
Event: Optical Data Storage '95, 1995, San Diego, CA, United States

Abstract

This paper discussed the further development of magnetic force microscopy to observe successive changes in recorded marks resulting from heating cycles in the presence of an external field. Our results on a conventional TbFeCo-based medium indicate very stable domains up to relatively high temperatures, which then rapidly collapse once wall movement starts. The images show that due to variations of the media on the local scale, the marks diminish in a highly nonuniformity manner. Inhomogeneities of the magnetic and mechanical properties of the medium play a crucial role in retarding wall motion and lead to formation of complex domain shapes prior to collapse. Pinning at the grooves has been similarly observed. Quantitative analysis of the results provide additonal insights concerning mark size reduction and edge sharpening as a function of temperature. This analysis also leads to the derivation of a critical radius for this media and biasing field combination.

Citation Download Citation

Romel D. Gomez, A. R. Kratz, Isaak D. Mayergoyz, and Edward R. Burke "Microscopic observations of domain collapse in TbFeCo-based magneto-optic recording", Proc. SPIE 2514, Optical Data Storage '95, (8 September 1995); https://doi.org/10.1117/12.218748

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