Ferroelectric Domain Structure of La-modified Lead Titanate Ceramics
14 Dec 2018 | Contributor(s): Brian Demczyk, G. Thomas
Presentation describes the ferroelectric domain structure of Lanthanum-modified lead titanate ceramics, as deduced by transmission electron microscopy, including the ferroelectric to paraelectric phase transformation. A significant result was the observation of a minimum grain size for...
Novel EM Nanoscale Techniques
Presentation Materials | 27 Nov 2017 | Contributor(s): Brian Demczyk
Describes unconventional use of conventional techniques (SAD,CBED, HREM and Fourier analysis) to elucidate hard-to-access structural information at the nano scale.
Bifunctional Air Electrode Studies
Presentation Materials | 01 Apr 2016 | Contributor(s): Brian Demczyk, C. T. Liu
This presentation outlines a number of fundamental and processing studies conducted on carbon-based bifunctional air electrodes
Structure and Morphology of Silicon-Germanium Thin Films
Presentation Materials | 07 Feb 2015 | Contributor(s): Brian Demczyk
This presentation describes the growth of (Si,Ge & SiGe) thin films on Si and Ge (001) and (111) substrates by ultrahigh vacuum chemical vapor deposition (UHVCVD). Thin films were characterized structurally by conventional and high-resolution transmission electron microscopy (TEM) and...
Interface Structure/Surface Morphology of (Co,Fe,Ni)/Cu/Si Thin Films
Presentation Materials | 25 Mar 2014 | Contributor(s): Brian Demczyk, R. Naik, A. Lukaszew, G. W. Auner, V. M. Naik
The effects of thin film and interfacial stress on the magnetic properties Fe, Co and Ni films deposited by molecular beam epitaxy on Cu underlayers (Si substrate) were examined, employing transmission,ans scanning probe microscopy and reflection high energy diffraction. It ws found that the...
Evolution of Microstructure and Magnetic Properties in CoCr Thin Films
Presentation Materials | 25 Mar 2014 | Contributor(s): Brian Demczyk, J. O. Artman
This presentation describes the structural and magnetic properties, including domain structures, in magnetron-sputtered Co-25% Cr thin films.
Structure and Properties of Carbon and Boron Nitride Nanotubes
Presentation Materials | 10 Jan 2014 | Contributor(s): Brian Demczyk
This presentation describes structure and mechanical property determinations on carbon and boron nitride (sp2-bonded) nanotubes , as deduced by transmission electron microscopy.
Corrosion Mechanisms in Magnetic Recording Media
Presentation Materials | 29 Jul 2013 | Contributor(s): Brian Demczyk
This presentation describes the corrosion process in longitudinal and perpendicular recording media, based upon electron and scanning probe microscopic analysis.
Texture-Induced hcp c-axis Alignment in Longitudinal Media
Presentation Materials | 15 Jul 2013 | Contributor(s): Brian Demczyk
This presentation discusses the development and measurement of c-axis text in longitudinal hard disk media.
Atomic Force Microscope Investigations of Lubrication Layers
Presentation Materials | 26 Nov 2012 | Contributor(s): Brian Demczyk
This presentation discusses the characterization of hard disk lubrication layers by phase contrast atomic force microscopy.
On the Origin of the Orientation Ratio in Sputtered Longitudinal Media
Presentation Materials | 26 Oct 2012 | Contributor(s): Brian Demczyk
This presentation discusses the influence of processing on the development of nanostructural features and their relationship to the orientation ratio, which is of importance in determining magnetic properties in longitudinal recording media. fabricated hard disks were characterized by...
Nanoscale Dimensions in Hard Disk Media
Presentation Materials | 27 Sep 2012 | Contributor(s): Brian Demczyk
This presentation examines the relationship of longidudinal hard disk media nanostructure,lubricant distribution and surface nanoroughness to disk contact to flying time transition and lubricant thickness to data zone takeoff. Also included is a model of disk wear.