21 Result(s)

Article

Indium Gallium Nitride on Germanium by Molecular Beam Epitaxy

Indium containing III-Nitride layers are predominantly grown by heteroepitaxy on foreign substrates, most often Al₂O₃, SiC and Si. We have investigated the epitaxial growth of In_xGa_1-xN (InGaN) alloys on Ge subst...

R. R. Lieten, W.-J. Tseng, M. Leys, J.-P. Locquet… in MRS Online Proceedings Library (2011)

Article

Magnetic Phase Transition in the Csci Fesi Spacer in Fe/FeSi Multilayers

We report the formation of the CsCI FeSi phase in Fe/FeSi multilayers with constant Fe thickness and varying FeSi layer thickness. The crystallographic and magnetic properties of this metastable FeSi phase are...

J. Dekoster, A. Vantomme, S. Degroote, R. Moons… in MRS Online Proceedings Library (2011)

Article

Molecular Beam Epitaxy study of a common a-GeO₂ interfacial passivation layer for Ge- and GaAs-based MOS heterostructures

Future CMOS technologies will require the use of substrate material with a very high mobility. Therefore, the combination of Ge pMOS with GaAs nMOS devices is investigated for its possible use in advanced CMOS...

C. Merckling, J. Penaud, F. Bellenger, D. Kohen… in MRS Online Proceedings Library (2009)

Article

Off-Specular Synchrotron Mössbauer Reflectometry: A Novel Tool for Studying the Domain Structure in Antiferromagnetic Multilayers

The off-specular (diffuse) nuclear resonant reflectivity of synchrotron radiation is a sensitive measure of the lateral autocorrelation of the magnetisation in thin films and multilayers. The width of the diff...

D. L. Nagy, L. Bottyán, L. Deák, B. Degroote, J. Dekoster… in Hyperfine Interactions (2002)

Article

Synchrotron Mössbauer reflectometry

Grazing incidence nuclear resonant scattering of synchrotron radiation can be applied to perform depth-selective phase analysis and to determine the isotopic and magnetic structure of thin films and multilayer...

D.L. Nagy, L. Bottyán, L. Deák, E. Szilágyi, H. Spiering… in Hyperfine Interactions (2000)

Article

Step-induced canting of magnetization in Fe/Ag superlattices

We have investigated the reorientation of the easy axis of magnetization in (0 0 1) Fe/Ag superlattices using vibrating sample magnetometry, Mössbauer spectroscopy and nuclear resonance scattering of synchrotr...

J. Dekoster, J. Meersschaut, B. Degroote, S. Degroote, C. L'abbé… in Hyperfine Interactions (2000)

Article

Controlled Phase Formation by Using a Diffusion Barrier - The Fe-Si REACTION

By analogy to reactive deposition epitaxy and titanium interlayer mediated epitaxy experiments, an attempt has been made to constrain the supply of reactants to the reaction interface in the solid phase reacti...

C. C. Theron, A. Falepin, S. Degroote, J. Dekoster… in MRS Online Proceedings Library (1999)

Article

Growth of Co ON Ag(100): A Comparison of Ultra Low Energyion Beam Deposition and Thermal Deposition

We have investigated the growth of Co deposited on Ag(100) with ultra low energy ion beam deposition. The preferred sites of nucleation, the island densities and heights are determined with scanning tunneling ...

B. Degroote, J. Dekoster, S. Degroote, H. Pattyn… in MRS Online Proceedings Library (1999)

Article

A study of the induced magnetic hyperfine fields in Fe/Ag multilayers

Near perpendicular magnetic hyperfine fields in ^110mAg have been observed in Fe/Ag multilayers. These fields are studied by low temperature nuclear orientation (LTNO) in multilayers [Ag(x ML)/Fe(y ML)]₂₀, with (x...

T. Phalet, M.J. Prandolini, W.D. Brewer, J. Dekoster, P. De Moor… in Hyperfine Interactions (1999)

Article

Interlayer exchange coupling, crystalline and magnetic structure in Fe/CsCl–FeSi multilayers grown by molecular beam epitaxy

Crystalline and magnetic structure as well as the interlayer exchange coupling in MBE grown Fe/FeSi multilayers are investigated. From conversion electron Mössbauer spectroscopy and ion beam channeling measure...

J. Dekoster, S. Degroote, J. Meersschaut, R. Moons, A. Vantomme… in Hyperfine Interactions (1999)

Chapter

Synchrotron Mössbauer Reflectometry in Materials Science

⁵⁷Fe nuclear resonant scattering experiments are reported on iron-containing thin films using 14.41 keV synchrotron radiation at angles of grazing incidence around and slightly above the critical...

D. L. Nagy, L. Bottyán, L. Deák, J. Dekoster… in Mössbauer Spectroscopy in Materials Science (1999)

Article

Layer magnetization canting in ⁵⁷Fe/FeSi multilayer observed by synchrotron Mössbauer reflectometry

Synchrotron Mössbauer reflectometry and CEMS results on a [⁵⁷Fe(2.55 nm)/FeSi\break(1.57 nm)]₁₀ multilayer (ML) on a Zerodur substrate are reported. CEMS spectra are satisfactorily fitted by α‐Fe and an interface...

L. Bottyán, J. Dekoster, L. Deák, A.Q.R. Baron, S. Degroote… in Hyperfine Interactions (1998)

Article

Study of perpendicular induced magnetic moments in the Ag of Ag/Fe multilayers

We investigated the induced magnetic behaviour of the Ag of Fe/Ag multilayers with low temperature nuclear orientation. The experiments show induced magnetic moments in all samples. Furthermore, multilayers wi...

T. Phale, J. Dekoster, P. De Moor, P. Schuurmans… in MRS Online Proceedings Library (1997)

Article

On the stability of bcc Co in Co/Fe superlattices an NMR and XRD study

While RHEED observations show that 10 to 11 As is the stability limit for an open bcc Co layer when grown on an Fe substrate, our XRD and NMR studies have shown that, in MBE grown Co/Fe superlattices, cobalt c...

J.P. Jay, E. Jêdryka, M. Wójcik, J. Dekoster… in Zeitschrift für Physik B Condensed Matter (1997)

Article

New phases and chemical short range order in co-deposited CoFe thin films with bcc structure: an NMR study

A ⁵⁹Co NMR study has been carried out on several series of co-evaporated Co₁-_xFe_x thin-film alloys prepared on MgO (001), GaAs (100), and GaAs (110) substrates at deposition temperatures between 175°C and 500°C. ...

M. Wojcik, J.P. Jay, P. Panissod, E. Jedryka… in Zeitschrift für Physik B Condensed Matter (1997)

Article

Preface

M. Rots, A. Vantomme, J. Dekoster, R. Coussement, G. Langouche in Hyperfine Interactions (1996)

Article

Nuclear spin-lattice relaxation of Co nuclei in a Fe/Co multilayer at low temperatures

Low-temperature nuclear orientation has been applied to the study of the nuclear spin-lattice relaxation (SLR) of⁶⁰Co in the Co phase of a single-crystalline [Co(21 Å) /Fe(24 Å)]₂₅ multilayer. The Co layers previ...

M. Trhlík, E. Beck, W. D. Brewer, J. Dekoster… in Czechoslovak Journal of Physics (1996)

Article

RTA-Preparation of β-FeSi₂ Layers from MBE-Grown Fe-Si Films Deposited on Si and Relaxed SiGe (100) Substrates

Rapid thermal annealing (RTA) of Fe-Si layers co-deposited on n- and p- type Si (100) and Si-capped relaxed Si_0.6Ge_0.4 (100) substrates was studied. Relaxed (100) Si_0.6Ge_0.4 epitaxial layers represent a pseudo-ma...

M. LíBezný, J. Poortmans, J. Dekoster, S. Degroote… in MRS Online Proceedings Library (1995)

Article

Mössbauer spectroscopy investigation of body centered cubic Co in Co/Fe superlattices prepared with MBE

A new spectrum component is observed in Mössbauer spectra of thin body centered cubic Co layers prepared in Fe/Co superlattices doped with⁵⁷Co. It is characterized by a large magnetic hyperfine field (31.2 T) and...

J. Dekoster, H. Bemelmans, S. Degroote, J. De Wächter, E. Jedryka… in Hyperfine Interactions (1995)

Article

Fe-Silicides Formed with Molecular Beam Epitaxy and Studied with Conversion Electron Mössbauer Spectroscopy

Fe-silicides were formed by annealing MBE-deposited thin ⁵⁷Fe layers with thicknesses between 20 Å and 60 Å on (7 × 7) reconstructed Si(111) substrates. During the growth the substrate was held at room temperatur...

S. Degroote, M.H. Langelaar, T. Kobayashi, J. Dekoster… in MRS Online Proceedings Library (1993)