Magneto-optical and structural properties of bialdyig/fe multilayers

J. X. Shen, K. W. Wierman, Y. B. Zhang, R. D. Kirby, J. A. Woollam, D. J. Sellmyer

Research output: Contribution to journalArticle

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Abstract

Bi- and Al-doped DyIG(y Å)/Fe(x Å) (y=50 to 130 Å and x=5 to 15 Å) multilayer thin films were made by magnetron sputtering onto Si(111) substrates. Rapid thermal annealing was used to crystallize these garnet multilayers. The crystallized multilayer samples possess well-defined interfaces. Atomic force microscopy showed that the annealed samples had smooth surfaces, with small grain sizes (∼30 to 80 nm). All of the samples had perpendicular magnetic anisotropy with very square hysteresis loops. The coercivity was found to vary from 600 Oe to 2 kOe, depending on Fe thickness and annealing conditions. The measured figure of merit √R(θ 2K2K) at 420 nm was bigger than 0.4, suggesting that Bi- and Al-doped DyIG/Fe multilayers are promising candidates for blue light magneto-optical recording applications.

Original languageEnglish (US)
Pages (from-to)6670-6672
Number of pages3
JournalJournal of Applied Physics
Volume75
Issue number10
DOIs
StatePublished - 1994

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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