Magnetic and structural characterizations of HCP permalloy films grown by molecular beam epitaxy

Jung-Chun Huang, Y. M. Hu, C. C. Yu

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

An hep metastable phase of Ni80Fe20(1100) structure has been grown as high-quality epitaxial films on Co(1100) and Cr(211) planes. The epilayers of Ni80Fe20 grow as hep structure up to a critical thickness of ∼100 Å, and the further layers transform to twinned fee structure. Magneto-optical Kerr effect study indicates that the hep Ni80Fe20(1100) layers exhibit strong crystalline induced uniaxial magnetic anisotropy with easy axis along the hcp[0001] direction. The subsequent fee Ni80Fe20 layers show decreasing coercive fields as the film thickness increased. For the thick fee film, interestingly, the magnetic easy axis shifts 90° with respect to that of the underlying hep layers. The result is explained by the shape anisotropy effect due to the formation of quasi-1D columnar islands directed perpendicular to the hcp[0001] direction.

Original languageEnglish
Pages (from-to)7046-7048
Number of pages3
JournalJournal of Applied Physics
Volume83
Issue number11
DOIs
Publication statusPublished - 1998 Jan 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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