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11 Apr 1988

Volume 52, Issue 15, pp. 1201-1278

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Preparation of superconducting Y‐Ba‐Cu‐O films by a reactive plasma evaporation method

Kazuo Terashima, Keisuke Eguchi, Toyonobu Yoshida, and Kazuo Akashi

Appl. Phys. Lett. 52, 1274 (1988); http://dx.doi.org/10.1063/1.99679 (3 pages) | Cited 23 times

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Y‐Ba‐Cu‐O superconducting films were prepared by a reactive plasma evaporation method, in which mixed powders were coevaporated in a thermal radio‐frequency Ar+O2 plasma and the ternary composition controlled high‐temperature metallic vapors were codeposited onto a substrate. The deposition rate was much more than 10 μm/min, which is several orders of magnitude higher than those reported by the other methods previously. The structure of the prepared films was identified as an orthorhombic oxygen‐deficient perovskite phase and some films showed the preferred orientation of (001). The as‐deposited film without post‐annealing showed a superconducting transition temperature Tcm (midpoint) of 94 K.
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74.78.-w Superconducting films and low-dimensional structures
81.15.Rs Spray coating techniques
74.70.-b Superconducting materials other than cuprates
68.55.-a Thin film structure and morphology

Direct overwrite in magneto‐optical recording

C. M. Savage, F. Marquis, M. Watson, and P. Meystre

Appl. Phys. Lett. 52, 1277 (1988); http://dx.doi.org/10.1063/1.99139 (2 pages) | Cited 10 times

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We have used a numerical model of thermomagnetic recording to investigate direct overwrite by domain destabilization in magneto‐optical thin films. Our model includes a linear dependence of domain wall velocity on the net wall pressure due to the demagnetizing field and the wall energy density. Direct overwrite by domain destabilization can be accomplished in one step, without bias fields or prior reading or erasure.
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85.70.Sq Magnetooptical devices
75.70.Kw Domain structure (including magnetic bubbles and vortices)
42.79.Vb Optical storage systems, optical disks
73.50.Jt Galvanomagnetic and other magnetotransport effects (including thermomagnetic effects)
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