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Articles 1 - 14 of 14

Full-Text Articles in Engineering

Magnetic Properties Of Crystals Of La5Mo4-XTXO16, S. Lofland, Jason Hattrick-Simpers, K. Ramanujachary, W. Mccarroll Mar 2015

Magnetic Properties Of Crystals Of La5Mo4-XTXO16, S. Lofland, Jason Hattrick-Simpers, K. Ramanujachary, W. Mccarroll

Jason R. Hattrick-Simpers

No abstract provided.


Applications Of High Throughput Screening Tools For Thermoelectric Materials, W. Wong-Ng, H. Joress, J. Martin, Y. Yan, M. Otani, E. Thomas, M. Green, Jason Hattrick-Simpers Mar 2015

Applications Of High Throughput Screening Tools For Thermoelectric Materials, W. Wong-Ng, H. Joress, J. Martin, Y. Yan, M. Otani, E. Thomas, M. Green, Jason Hattrick-Simpers

Jason R. Hattrick-Simpers

No abstract provided.


Data Management And Visualization Of X-Ray Diffraction Spectra From Thin Film Ternary Composition Spreads, I. Takeuchi, C. Long, O. Famodu, M. Murakami, Jason Hattrick-Simpers, G. Rubloff, M. Stukowski, K. Rajan Mar 2015

Data Management And Visualization Of X-Ray Diffraction Spectra From Thin Film Ternary Composition Spreads, I. Takeuchi, C. Long, O. Famodu, M. Murakami, Jason Hattrick-Simpers, G. Rubloff, M. Stukowski, K. Rajan

Jason R. Hattrick-Simpers

We discuss techniques for managing and visualizing x-ray diffraction spectrum data for thin film composition spreads which map large fractions of ternary compositional phase diagrams. An in-house x-ray microdiffractometer is used to obtain spectra from over 500 different compositions on an individual spread. The MATLAB software is used to quickly organize the data and create various plots from which one can quickly grasp different information regarding structural and phase changes across the composition spreads. Such exercises are valuable in rapidly assessing the “overall” picture of the structural evolution across phase diagrams before focusing in on specific composition regions for detailed …


High-Throughput Screening Of Magnetic Properties Of Quench Metallic-Alloy Thin-Film Composition Spreads, Jason Hattrick-Simpers, Cui Jun, Makoto Murakami, Antonio Orozco, Lee Knauss, Robert Booth, Edward Greve, Samuel Lofland, Manfred Wuttig, Ichiro Takeuchi Mar 2015

High-Throughput Screening Of Magnetic Properties Of Quench Metallic-Alloy Thin-Film Composition Spreads, Jason Hattrick-Simpers, Cui Jun, Makoto Murakami, Antonio Orozco, Lee Knauss, Robert Booth, Edward Greve, Samuel Lofland, Manfred Wuttig, Ichiro Takeuchi

Jason R. Hattrick-Simpers

No abstract provided.


Phase Transformation In An Yttrium-Hydrogen System Studied By Tem, K. Wang, Jason Hattrick-Simpers, L. Bendersky Mar 2015

Phase Transformation In An Yttrium-Hydrogen System Studied By Tem, K. Wang, Jason Hattrick-Simpers, L. Bendersky

Jason R. Hattrick-Simpers

No abstract provided.


Fabrication And Characterization Of In-Situ Grown Epitaxial Ba1-XSrXTio3 Composition Spreads, K. Chang, M. Aronova, O. Famodu, Jason Hattrick-Simpers, S. Lofland, I. Takeuchi, C. Lu, L. Bendersky, H. Chang Mar 2015

Fabrication And Characterization Of In-Situ Grown Epitaxial Ba1-XSrXTio3 Composition Spreads, K. Chang, M. Aronova, O. Famodu, Jason Hattrick-Simpers, S. Lofland, I. Takeuchi, C. Lu, L. Bendersky, H. Chang

Jason R. Hattrick-Simpers

No abstract provided.


Synthesis And Characterization Of Sr3Femoo6.88: An Oxygen-Deficient 2d Analogue Of The Double Perobskite Sr2Femoo6, Gabriel Veith, Martha Greenblatt, Mark Croft, K. Ramanujachary, Jason Hattrick-Simpers, Samuel Lofland, Israel Nowik Mar 2015

Synthesis And Characterization Of Sr3Femoo6.88: An Oxygen-Deficient 2d Analogue Of The Double Perobskite Sr2Femoo6, Gabriel Veith, Martha Greenblatt, Mark Croft, K. Ramanujachary, Jason Hattrick-Simpers, Samuel Lofland, Israel Nowik

Jason R. Hattrick-Simpers

No abstract provided.


Determination Of Work Functions In The Ta1-XAlXNY/Hfo2 Advanced Gate Stack Using Combinatorial Methodology, Kao-Shuo Chang, Martin Green, Jason Hattrick-Simpers, Ichiro Takeuchi, J. Suehle, O. Celik, S. De Gendt Mar 2015

Determination Of Work Functions In The Ta1-XAlXNY/Hfo2 Advanced Gate Stack Using Combinatorial Methodology, Kao-Shuo Chang, Martin Green, Jason Hattrick-Simpers, Ichiro Takeuchi, J. Suehle, O. Celik, S. De Gendt

Jason R. Hattrick-Simpers

No abstract provided.


Combinatorial Study Of Ni-Ti-Pt Ternary Metal Gate Electrodes On Hfo2 For The Advanced Gate Stack, K.-S. Chang, M. Green, J. Suehle, E. Vogel, H. Xiong, Jason Hattrick-Simpers, I. Takeuchi, O. Famodu, K. Ohmori, P. Ahmet, T. Chikyow, P. Majhi, B.-H. Lee, M. Gardner Mar 2015

Combinatorial Study Of Ni-Ti-Pt Ternary Metal Gate Electrodes On Hfo2 For The Advanced Gate Stack, K.-S. Chang, M. Green, J. Suehle, E. Vogel, H. Xiong, Jason Hattrick-Simpers, I. Takeuchi, O. Famodu, K. Ohmori, P. Ahmet, T. Chikyow, P. Majhi, B.-H. Lee, M. Gardner

Jason R. Hattrick-Simpers

The authors have fabricated combinatorial Ni–Ti–Pt ternary metal gate thin film libraries on HfO2 using magnetron co-sputtering to investigate flatband voltage shift (ΔVfb) , work function (Φm) , and leakage current density (JL) variations. A more negative ΔVfb is observed close to the Ti-rich corner than at the Ni- and Pt-rich corners, implying smaller Φm near the Ti-rich corners and higher Φm near the Ni- and Pt-rich corners. In addition, measured JL values can be explained consistently with the observed Φm variations. Combinatorial methodologies prove to be useful in surveying the large compositional space of ternary alloymetal gate electrode systems.


High-Throughput Characterization Of Shape Memory Thin Films Using Automated Temperature-Dependent Resistance Measurements, Sigurd Thienhaus, Christiane Zamponi, Holger Rumpf, Jason Hattrick-Simpers, Ichiro Takeuchi, Alfred Ludwig Mar 2015

High-Throughput Characterization Of Shape Memory Thin Films Using Automated Temperature-Dependent Resistance Measurements, Sigurd Thienhaus, Christiane Zamponi, Holger Rumpf, Jason Hattrick-Simpers, Ichiro Takeuchi, Alfred Ludwig

Jason R. Hattrick-Simpers

No abstract provided.


Combinatorial Approach To Turbine Bond Coat Discovery, Christopher Metting, Johnathan Bunn, Ellen Underwood, Stephen Smoak, Jason Hattrick-Simpers Mar 2015

Combinatorial Approach To Turbine Bond Coat Discovery, Christopher Metting, Johnathan Bunn, Ellen Underwood, Stephen Smoak, Jason Hattrick-Simpers

Jason R. Hattrick-Simpers

No abstract provided.


Combinatorial Investigation Of Ferromagnetic Shape-Memory Alloys In The Ni-Mn-Al Ternary System Using A Composition Spread Technique, Olugbenga Famodu, Jason Hattrick-Simpers, Maria Aronova, Kao-Shou Chang, Makoto Murakami, Manfred Wuttig, Teiko Okazaki, Yasubumi Furuya, Lee Knauss, Leonid Bendersky, Frank Biaricaniello, Ichiro Takeuchi Mar 2015

Combinatorial Investigation Of Ferromagnetic Shape-Memory Alloys In The Ni-Mn-Al Ternary System Using A Composition Spread Technique, Olugbenga Famodu, Jason Hattrick-Simpers, Maria Aronova, Kao-Shou Chang, Makoto Murakami, Manfred Wuttig, Teiko Okazaki, Yasubumi Furuya, Lee Knauss, Leonid Bendersky, Frank Biaricaniello, Ichiro Takeuchi

Jason R. Hattrick-Simpers

No abstract provided.


Enhanced Dielectric Properties In Single Crystal-Like Bifeo3 Thin Films Grown By Flux-Mediated Epitaxy, S.-H. Lim, M. Murakami, J. Yang, S.-Y. Young, Jason Hattrick-Simpers, M. Wuttig, L. Salamanca-Riba, I. Takeuchi Mar 2015

Enhanced Dielectric Properties In Single Crystal-Like Bifeo3 Thin Films Grown By Flux-Mediated Epitaxy, S.-H. Lim, M. Murakami, J. Yang, S.-Y. Young, Jason Hattrick-Simpers, M. Wuttig, L. Salamanca-Riba, I. Takeuchi

Jason R. Hattrick-Simpers

We have fabricated single crystal-like BiFeO3 (BFO) thin films by flux-mediated epitaxy using pulsed laser deposition(PLD). The Bi–Cu–O flux composition and its thickness were optimized using composition spread, thickness gradient, and temperature gradient libraries. The optimized BFO thin films grown with this technique showed larger grain size of ∼2μm and higher dielectric constant in the range of 260–340 than those for standard PLD grown films. In addition, the leakage current density of the films was reduced by two orders of magnitude compared to that of standard PLD grown films.


Tunable Multiferroic Properties In Nanocomposite Pbtio3-Cofe2O4 Epitaxial Thin Films, M. Murakami, K.-S. Chang, M. Aronova, C.-L. Lin, Ming Yu, Jason Hattrick-Simpers, M. Wuttig, I. Takeuchi, C. Gao, B. Hu, S. Lofland, L. Knauss, L. Bendersky Mar 2015

Tunable Multiferroic Properties In Nanocomposite Pbtio3-Cofe2O4 Epitaxial Thin Films, M. Murakami, K.-S. Chang, M. Aronova, C.-L. Lin, Ming Yu, Jason Hattrick-Simpers, M. Wuttig, I. Takeuchi, C. Gao, B. Hu, S. Lofland, L. Knauss, L. Bendersky

Jason R. Hattrick-Simpers

We report on the synthesis of PbTiO3–CoFe2O4 multiferroic nanocomposites and continuous tuning of their ferroelectric and magnetic properties as a function of the average composition on thin-film composition spreads. The highest dielectric constant and nonlinear dielectric signal was observed at (PbTiO3)85–(CoFe2O4)15, where robust magnetism was also observed. Transmission electron microscopy revealed a pancake-shaped epitaxial nanostructure of PbTiO3 on the order of 30 nm embedded in the matrix of CoFe2O4 at this composition. Composition dependent ferroics properties observed here indicate that there is considerable interdiffusion of cations into each other.