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Using electron-induced X-ray emission spectroscopy (XES), we have studied two Al/Ni periodic multilayers that differ only by their annealing temperature: as-deposited and annealed at 115C. Our aim is to show that XES can provide further…

Materials Science · Physics 2013-07-16 K. Le Guen , G. Gamblin , Philippe Jonnard , M. Salou , J. Ben Youssef , S. Rioual , B. Rouvellou

We present first-principles calculations of the structural and electronic properties of Si(001)-SiO2 interfaces. We first arrive at reasonable structures for the c-Si/a-SiO2 interface via a Monte-Carlo simulated annealing applied to an…

Materials Science · Physics 2009-10-31 Kwok-On Ng , David Vanderbilt

We have investigated the impact of thermal annealing on the interaction of single layer MoS2 and Au using Raman Spectroscopy. We found MoS2 has two main modes of interactions with the underlying Au being either weakly-coupled or…

Materials Science · Physics 2023-11-10 Stephanie Lough , Jesse E. Thompson , Darian Smalley , Rahul Rao , Masahiro Ishigami

Diffusion mediated interaction in metal-substrate assembly during high temperature annealing leads to possible formation of new composite materials. Here, sputtered grown Ti films on Si3N4/Si substrate has been reported to produce titanium…

Materials Science · Physics 2020-11-19 Sachin Yadav , Sangeeta Sahoo

The astrochemistry of CO2 ice analogues has been a topic of intensive investigation due to the prevalence of CO2 throughout the interstellar medium and the Solar System, as well as the possibility of it acting as a carbon feedstock for the…

In this study, we achieved the improvement of uniaxial perpendicular magnetic anisotropy (PMA) in the W/MgAl2O4/CoFeMnSi/W/CoFeMnSi/MgAl2O4/W heterostructure by manipulating the annealing temperature (TA) [350 C, 450 C, and 550 C]. We…

Materials Science · Physics 2024-08-27 L. Saravanan , Nanhe Kumar Gupta , Vireshwar Mishra , Sujeet Chaudhary , Carlos Garcia

We report annealing induced exchange bias in Fe-Cu-Pt based heterostructures with Cu as an intermediate layer (Fe/Cu/Pt heterostructure) and capping layer (Fe/Pt/Cu heterostructure). Exchange bias observed at room temperature (300 K) is…

Materials Science · Physics 2019-04-26 M. A. Basha , Harsh Bhatt , Yogesh Kumar , C. L. Prajapat , M. Gupta , V. Karki , S. Basu , Surendra Singh

The effect of increasing temperature on the structural stability and interactions of two kinds of Al/Zr (Al(1%wtSi)/Zr and Al(Pure)/Zr) multilayer mirrors are investigated. All Al/Zr multilayers annealed from 200^{\circ}C to 500^{\circ}C,…

Materials Science · Physics 2015-06-11 Qi Zhong , Shuang Ma , Zhong Zhang , Runze Qi , Jia Li , Zhanshan Wang , Philippe Jonnard

Electronic and dielectric properties of vapor-phase grown MoS_{2} have been investigated in metal/MoS_{2}/silicon capacitor structures by capacitance-voltage and conductancevoltage techniques. Analytical methods confirm the MoS_{2} layered…

Materials Science · Physics 2019-07-19 M. Belete , S. Kataria , U. Koch , M. Kruth , C. Engelhard , J. Mayer , O. Engström , M. C. Lemme

Graphitization of the 6H-SiC(0001) surface as a function of annealing temperature has been studied by ARPES, high resolution XPS, and LEED. For the initial stage of graphitization - the 6root3 reconstructed surface - we observe sigma-bands…

Materials Science · Physics 2007-05-23 K. V. Emtsev , Th. Seyller , F. Speck , L. Ley , P. Stojanov , J. D. Riley , R. G. C. Leckey

Cross-sectional transmission electron microscopy (TEM) is used to characterize an amorphous layer observed at the interface in graphite and graphene films grown via thermal decomposition of C-face 4H-SiC. The amorphous layer does not to…

Materials Science · Physics 2015-05-28 R. Colby , M. L. Bolen , M. A. Capano , E. A. Stach

We perform an optical spectroscopy study to investigate the properties of different artificial MoS$_2$ bi- and trilayer stacks created from individual monolayers by a deterministic transfer process. These twisted bi- and trilayers differ…

Mesoscale and Nanoscale Physics · Physics 2015-09-29 G. Plechinger , F. Mooshammer , A. Castellanos-Gomez , G. A. Steele , C. Schüller , T. Korn

We report that annealing in low-oxygen-partial-pressure (low-p$_{\rm O2}$) ambient is effective in reducing the interface state density (D$_{\rm IT}$) at a SiC (0001)/SiO$_{\rm 2}$ interface near the conduction band edge (E$_{\rm C}$) of…

Materials Science · Physics 2019-02-19 Takuma Kobayashi , Keita Tachiki , Koji Ito , Tsunenobu Kimoto

Novel solar cell materials consisting of Si nanoparticles embedded in SiO2 layers have been studied using positron annihilation spectroscopy in Doppler broadening mode, and photoluminescence. Two positron-trapping interface states are…

Materials Science · Physics 2011-06-10 S. Kilpelainen , Y. -W. Lu , F. Tuomisto , J. Slotte , A. Nylandsted Larsen

Nanocrystalline materials are well known for their beneficial mechanical and physical properties. However, it is of utmost importance to stabilize the microstructure at elevated temperatures to broaden the window of application e.g. by…

Dissociation of gas hydrates below 240 K leads to the formation of a metastable form of water ice, so called cubic ice (Ic). Through its defective nature and small particle size the surface film composed of such material is incapable of…

Materials Science · Physics 2015-10-28 Andrzej Falenty , Thomas C. Hansen , Werner F. Kuhs

This paper reports on the physical and temperature-dependent electrical characterizations of the oxide/semiconductor interface in MOS capacitors with a SiO2 layer deposited on 4H-SiC using dichlorosilane and nitrogen-based vapor precursors.…

We found that carbon-associated byproducts formed at the dry-oxidized SiO2/SiC(0001) interface could be decomposed and be taken out to the SiO2 side by high-purity Ar annealing. We evaluated the concentration of the ejected carbon atoms in…

Materials Science · Physics 2017-10-03 Takuma Kobayashi , Tsunenobu Kimoto

The structure of crystalline interfaces plays an important role in solid-state reactions. The Al2O3/MgAl2O4/MgO system provides an ideal model system for investigating the mechanisms underlying the migration of interfaces during interface…

Materials Science · Physics 2018-12-20 C. Li , G. Habler , T. Griffiths , A. Rečnik , P. Jeřábek , L. C. Götze , C. Mangler , T. J. Pennycook , J. Meyer , R. Abart

Electrical properties of metal-semiconductor (M/SC) and metal/oxide/SC structures built with Zr or ZrO\_2 deposited on oxygen-terminated surfaces of (001)-oriented diamond films, comprising a stack of lightly p-doped diamond on a heavily…