-
Article
Improvements in the Conductivity of n-type ZnO Through Codo** with Al and In
ZnO has been identified as a viable candidate to replace expensive Sn doped In2O3 due to its high transparency and good conductivity. ZnO has been doped with many elements including Al and In to achieve conductiv...
-
Article
Molecular volume and polarizability in the amorphous dielectric Zr0.2 Sn0.2Ti0.6O2
The dielectric constant of a material is strongly dependent on both the polarizability and the density of the material through the Clausius Mossotti equation. While the atomic polarizability depends on the sto...
-
Article
High-Throughput Measurement of Magnetostriction using MEMS and Composition Spreads
While measurement of magnetostriction in bulk materials is readily accomplished using a strain gauge, measurement of this quantity for thin films presents a greater challenge, and typically involves measuremen...
-
Article
Iron-clad MgB2Superconductor Wires
The fabrication of bulk, stoichiometric MgB2wires is a challenge because of the difficulties associated with the volatility and reactivity of magnesium and the brittleness of MgB2. Metal-clad processing of MgB2is...
-
Article
High critical currents in iron-clad superconducting MgB2 wires
Technically useful bulk superconductors must have high transport critical current densities, Jc, at operating temperatures. They also require a normal metal cladding to provide parallel electrical conduction, the...
-
Article
Improved properties of TaOx films doped with Al and N
Simultaneous addition of Al and N to Ta-O thin films is found to significantly improve the dielectric properties of the films. Specifically, substitution of 10-40 at. % Al for Ta along with ∼2 at. % N for O is...
-
Article
High Dielectric Constant Hf-Ti-Sn-O Off-Axis Cosputtered Films
New Hf-Sn-Ti-O thin-film dielectric materials were explored using a compositional-spread approach. Thin films of composition Hf0.2Sn0.05Ti0.75O2 prepared at 250°C have excellent dielectric properties: 40-50 nm th...
-
Article
Discovery of a useful thin-film dielectric using a composition-spread approach
The continuing drive towards miniaturization of electronic devices1 is motivating the search for new materials. Consider, for example, the case of the much-used dynamic random-access memory. The minimum capacitan...
-
Article
Temperature Dependence of Strong Exchange Coupling in Ferrite Heterostructures
Single crystalline spinel structure ferrite thin film bilayers exhibit nearly ideal exchange coupling at room temperature. In these bilayers, the blocking temperature is only limited by the Curie temperature o...
-
Article
The Effects of Strain on The Magnetic Anisotropy of Doped Manganite Thin Films
We show the importance of the role of strain in doped manganite perovskite materials by revealing the dominance of stress anisotropy effects over magnetocrystalline anisotropy effects in the magnetic anisotrop...
-
Article
Fe-Cr-N Based Nanocrystalline Soft Magnetic Thin Films
We have investigated the soft magnetic properties of new Fe-Cr-Ta-N and Fe-Cr-Hf-N alloy films. Thin films with compositions in the range of Fe-2∼8%Cr-0∼1%Ta (or Hf)-5∼10%N (in atomic %) were prepared by react...
-
Article
Magnetic Anisotropy and Lattice Distortions in The Doped Perovskite Manganites
We have investigated the magnetic anisotropies of doped manganite materials in epitaxial thin film and single crystal form. Structural characterization, including x-ray diffraction, Rudierford backscattering s...
-
Article
Epitaxial growth and magnetic behavior of NiFe2O4 thin films
Thin films of NiFe2O4 were deposited on SrTiO3 (001) and Y0.15Zr0.85O2 (yttria-stabilized zirconia) (001) and (011) substrates by 90°-off-axis sputtering. Ion channeling, x-ray diffraction, and transmission elect...
-
Article
Epitaxial Single Crystalline Ferrite Films for High Frequency Applications
The successful growth of single crystal ferrites in thin film form is an important step towards their future incorporation into integrated circuits operating at microwave frequencies. We have successfully grow...
-
Article
Structure and Magnetic Properties of Epitaxial NiFe2O4 Films
We have made NiFe2O4 films by rf sputtering using the 90 °off-axis geometry. Films grown at 600°C on SrTiO3 and Y.15Zr.85O2 substrates are single crystals with (100) and (110) texture, respectively, but exhibit a...
-
Article
Transparent Conducting Films Of GaInO3 By Sputtering
One of the critical components used in the display device is the transparent conducting electrode. A new candidate for the transparent conductor, GaInO3 containing a tetrahedrally coordinated Ga site was identifi...
-
Article
Transparent Conducting Films Grown By Pulsed Laser Deposition
We have studied the properties of two types of transparent conducting oxides grown by pulsed laser deposition (PLD) on quartz substrates. We have grown films of ITO with resistivity as low as 250 μΩ-cm and wit...
-
Article
Superconductivity at 23 K in yttrium palladium boride carbide
COPPER oxide compounds have dominated superconductivity research since 1986 because of their very high transition temperatures (Tcs). In contrast, no new families of high-Tc intermetallic compounds have been disc...
-
Chapter
Xe+ Irradiation Increases Magnetoresistance in Sputtered Fe/Cr Superlattices
We have studied the magnetoresistance of sputtered Fe/Cr superlattices as a function of 500 keV Xe+ irradiation in the fluence range of 1 × 1010 to 1 × 1015 Xe+/cm2. The results show that the giant magnetoresista...
-
Article
Superconductivity in the quaternary intermetallic compounds LnNi2B2C
THE attainment of unprecedentedly high transition temperatures (Tcs) in the copper oxide superconductors illustrates how working with more complex chemical systems allows greater opportunity to balance opposing f...
