MBE Growth of Artificially-Layered Magnetic Metal Structures

Farrow, R. F. C.; Marks, R. F.; Harp, G. R.; Weller, D.; Rabedeau, T. A.; Toney, Michael F.; Parkin, Stuart S. P.

doi:10.1016/b978-081551371-1.50009-3

Cited by 5 publications

(6 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently it has been demonstrated that the use of the seeded epitaxy method can alter the thin film structure in molecular beam epitaxy (MBE) deposition [1][2][3][4][5][6][7][8][9] and sputter deposition [10][11][12]. The key advantage of seeded epitaxy is that multiple crystal structures and/or orientations of a given element * Corresponding author.…”

Section: Introductionmentioning

confidence: 98%

Seeded epitaxy of Co/Au(1 1 1) multilayers on α-Al2O3(0 0 0 1): Influence of Co seed layer

Kamiko

Yamamoto

2007

Materials Science and Engineering: B

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 98%

Seeded epitaxy of Co/Au(1 1 1) multilayers on α-Al2O3(0 0 0 1): Influence of Co seed layer

Kamiko

Yamamoto

2007

Materials Science and Engineering: B

View full text Add to dashboard Cite

“…An appropriate way to accommodate the different lattice parameters of the substrate and metallic film is the use of seed layers; they are deposited onto the substrate prior to the growth of the metal film. Seeded epitaxy has been known to be a useful method to improve thin film growth in molecular beam epitaxy (MBE) deposition [1][2][3][4][5][6][7] and sputter deposition [8][9][10]. The key advantage of seeded epitaxy is that one can stabilize multiple crystal structures or orientations of a given element by using a single crystal substrate by changing the initial buffer layer.…”

Section: Introductionmentioning

confidence: 99%

Epitaxial growth of Au(1 1 1) on α-Al2O3(0 0 0 1) by using a Co seed layer

Kamiko

Yamamoto

2006

Journal of Crystal Growth

View full text Add to dashboard Cite

“…1000 A thick Co77Pt23 alloy films were deposited by MBE at various temperatures onto 10 A Pt buffer layers which were grown at 875 K on sapphire (0001) substrates. This results in high quality (111) [or (0001)] oriented alloy films [13]. The deposition chamber was maintained at a pressure < 4 x 10~1 0 mbar throughout growth.…”

mentioning

confidence: 99%

Magneto-optical Kerr spectroscopy of a new chemically ordered alloy:Co3Pt

et al. 1993

View full text Add to dashboard Cite

The sensitivity of magneto-optical spectra to alloy chemical ordering is established. This is demonstrated for a new ordered CosPt phase, which was synthesized in thin film form using molecular beam epitaxial growth. This compound consists of alternating planes of Co and CoPt atoms with a hexagonal ABAB... layer sequence. The chemical ordering is accompanied by a substantial electronic structure change as reflected in a new peak in magneto-optical spectra at ~ 3.2 eV photon energy PACS numbers: 78.20.Ls, 61.66.Dk, 81.30.Bx Magneto-optical effects have attracted a lot of attention recently in research of magnetic thin films and multilayers. Strong resonance effects due to reduced optical constants [1,2], quantum confinement effects in ultrathin Fe layers [3], oscillations of the Kerr rotation with magnetic layer thickness due to quantum well states [4,5] and strong correlations between the magneto-optical Kerr effect (MOKE), and magnetic anisotropies [6] are among the most exciting recent discoveries in this field. While magnetostructural correlations have been known for a long time [7], the possibility of chemical ordering-related effects in the magneto-optical spectra has been suggested only recently [8,9]. With the advent of improved bandstructure-based magneto-optical calculations [10], it is possible to understand magneto-optical transitions from first principles and predict the effects of material structure upon Kerr rotation. In particular, the effect of chemical ordering on magneto-optical properties provides an important test of current theory. Co-Pt alloys provide an attractive candidate material for such studies since the Co-Pt bulk phase diagram reveals a continuous series of solid solutions with ferromagnetic order up to 90 at. % Pt at room temperature and the existence of chemically ordered CoPt and CoPt3 phases [11]. No chemically ordered compound is known for the composition CoaPt [11], although an LI2 cubic phase has been predicted in a recent calculation by Sanchez et at [12]. In this Letter we report the observation of a chemically ordered Co3Pt structure in films grown by molecular beam epitaxy (MBE). More importantly, we report the first unambiguous correlation between chemical ordering and magneto-optical Kerr rotation. 1000 A thick Co77Pt23 alloy films were deposited by MBE at various temperatures onto 10 A Pt buffer layers which were grown at 875 K on sapphire (0001) substrates. This results in high quality (111) [or (0001)] oriented alloy films [13]. The deposition chamber was maintained at a pressure < 4 x 10~1 0 mbar throughout growth. Electron gun sources were used for both Co and Pt, with deposition rates in the range 0.05-0.2 A/s. All compositions were checked with x-ray fluorescence. The spectral dependences of the polar Kerr effect were measured in saturating fields of ±20 kOe in the photon energy range 0.8-5.3 eV [14]. The saturation magnetization was determined using vibrating sample magnetometry. All magnetic and magneto-optic measurements were made at room temperature.

show abstract

MBE Growth of Artificially-Layered Magnetic Metal Structures

Cited by 5 publications

References 74 publications

Seeded epitaxy of Co/Au(1 1 1) multilayers on α-Al2O3(0 0 0 1): Influence of Co seed layer

Seeded epitaxy of Co/Au(1 1 1) multilayers on α-Al2O3(0 0 0 1): Influence of Co seed layer

Epitaxial growth of Au(1 1 1) on α-Al2O3(0 0 0 1) by using a Co seed layer

Magneto-optical Kerr spectroscopy of a new chemically ordered alloy:Co3Pt

Contact Info

Product

Resources

About