In-liquid Bulk Acoustic Wave Resonators for Biosensing Applications
27 May 2020 | | Contributor(s):: Girish Rughoobur
Gravimetric sensors based on thin-film bulk acoustic wave (BAW) resonators operating between 1-5 GHz have tremendous potential as biosensors because they are inexpensive, label-free, fast and highly sensitive. The two main challenges in this objective are: the conventional longitudinal mode...
Structure and Morphology of Silicon Germanium Thin Films
30 Dec 2013 | | Contributor(s):: Brian Demczyk
Single layer silicon and germanium films as well as nominally 50-50 silicon-germanium alloys were deposited on single crystal silicon and germanium (001) and (111) substrates by ultrahigh vacuum chemical vapor deposition. These films spanned the range of + 4 % film-substrate lattice mismatch. A...
Evolution of microstructure and magnetic properties in magnetron-sputtered CoCr thin films
02 Feb 2012 | | Contributor(s):: Brian Demczyk
In this work, transmission electron microscopy, including the Lorentz mode is combined with magnetic measurements (vibrating sample magnetometry and ferromagnetic resonance)to draw correlations between the structural and magnetic constituents in cobalt-chromium films of increasing thickness.
Interface structure and surface morphology of (Co, Fe, Ni)/Cu/Si(100) thin films
07 Oct 2011 | | Contributor(s):: Brian Demczyk, V.M. Naik, A. Lukaszew, R. Naik, G. W. Auner
We have examined bilayer Co/Cu, Fe/Cu, and Ni/Cu films deposited by molecular-beam epitaxy onhydrogen-terminated @100# silicon substrates.
Oxidation Behavior of CoCr Thin Films
07 Oct 2011 | | Contributor(s):: Brian Demczyk
In this work, elemental redistribution of annealed CoCr thin films has been investigated by X-ray photoelectron spectroscopy.
Lubrication Effects on Head-Disk Spacing Loss
07 Oct 2011 | | Contributor(s):: Brian Demczyk, J. Liu, C. Y. Chen, S. Zhang
The effects of lubrication thickness on the magnetic recording head-media tribology were investigated in this study.
Growth of Cu films on hydrogen terminated Si(lQ0) and Si(lll) surf&es
07 Oct 2011 | | Contributor(s):: Brian Demczyk, R. Naik, G. Auner, C. Kota, U. Rao
We have employed reflection high energy electron diffraction (RHEED) and high resolutiontransmission electron microscopy (HREM) to study Cu films grown on hydrogen terminatedSi( 100) and Si( 111) substrates by molecular beam epitaxy.
Origin of the orientation ratio in sputtered longitudinal media
07 Oct 2011 | | Contributor(s):: Brian Demczyk, J. N. Zhou, G. Choe, E. Stach, E. C. Nelson, U. Dahmen
The surface morphology, thin film microstructure, and crystallography of sputtered longitudinalmedia were examined by atomic force and transmission electron microscopy.
Magnetic properties of magnetron sputtered Co-Cr thin films
07 Oct 2011 | | Contributor(s):: Brian Demczyk, J. O. Artman
The magnetic properties 01 magnetron sputtered CO-22 at.% Cr films of various thickness deposited on glass have been examined, with particular attentionto the various contributions to the film anisotropy
Comparison of strain relaxation in epitaxial Si0.3Ge0.7 films grown on Si(001) and Ge(001)
Surface and interfacial strain have been computed for SiGe thin films grown by UHVCVD,based on measurements via transmission electron microscopy and Raman spectroscopy.
Anisotropic magnetoresistance in colossal magnetoresistive La1-xSrxMnO3 thin films
03 Sep 2010 | | Contributor(s):: Jeng-Bang (Tony) Yau
We report on magnetic field and temperature dependent measurements of the anisotropic magnetoresistance (AMR) in epitaxial La1-xSrxMnO3 (LSMO) thin flms. While in 3d ferromagnetic alloys increasing the magnetization, either by reducing the temperature or increasing the magnetic field, increases...
Functional Graded Materials architectures applied at nanoscale: thin PVD nanograded and layered coatings
out of 5 stars
09 Oct 2008 | | Contributor(s):: Vasco Teixeira
Functionally graded materials (FGM’s) are designed to achieve levels of performance superior to that of homogeneous materials by combining the desirable properties of each constituent phase. FGM’s are composite materials where the composition or the microstructure is locally varied so that a...