MBE growth of ultrathin Co films on a Si(1 1 1) surface with ultrathin buffer layers

Kyoko Hyomi, Akihiro Murayama, Yasuo Oka, Shinji Kondoh, Charles M Falco

Research output: Contribution to journalArticle

Abstract

We have grown hetero-epitaxially ultrathin Co films on a 7 × 7-Si(1 1 1) surface using buffer layers of Au and Cu, where the thickness of each film is controlled to atomic-scale dimensions. The film structure and related magnetic properties are investigated. The hcp-(0 0 0 1) planes are identified in Co deposited on the Au/Cu surface, while the fcc-(1 1 1) planes are dominant with a Cu-buffer layer. Perpendicular magnetic anisotropy constants in Co indicate sharp thickness-independent interfaces and bulk-like crystallinity even in a monatomic thickness region of < 2 monolayers of Co. Structure related inhomogeneities are quantified as a function of Co thickness for various overlayers by the spin-wave spectrum width. In the results, we show a successful fabrication of epitaxial growth of ultrathin Co films on the Au/Cu/Si surface with a well-defined magnetic structure.

Original languageEnglish (US)
Pages (from-to)1383-1387
Number of pages5
JournalJournal of Crystal Growth
Volume237-239
Issue number1-4 II
DOIs
StatePublished - Apr 2002

Fingerprint

Buffer layers
Molecular beam epitaxy
buffers
Spin waves
Magnetic anisotropy
Magnetic structure
Epitaxial growth
magnons
Monolayers
crystallinity
Magnetic properties
inhomogeneity
magnetic properties
Fabrication
anisotropy
fabrication

Keywords

  • A1. interfaces
  • A3. Molecular beam epitaxy
  • B1. Metals
  • B2. Magnetic properties

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

MBE growth of ultrathin Co films on a Si(1 1 1) surface with ultrathin buffer layers. / Hyomi, Kyoko; Murayama, Akihiro; Oka, Yasuo; Kondoh, Shinji; Falco, Charles M.

In: Journal of Crystal Growth, Vol. 237-239, No. 1-4 II, 04.2002, p. 1383-1387.

Research output: Contribution to journalArticle

Hyomi, Kyoko ; Murayama, Akihiro ; Oka, Yasuo ; Kondoh, Shinji ; Falco, Charles M. / MBE growth of ultrathin Co films on a Si(1 1 1) surface with ultrathin buffer layers. In: Journal of Crystal Growth. 2002 ; Vol. 237-239, No. 1-4 II. pp. 1383-1387.
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