Zobrazeno 1 - 10
of 187
pro vyhledávání: '"Eugene L. VENTURINI"'
Autor:
Todd C. Monson, Yang Ren, Judith Maria Lavin, Dale L. Huber, Valeri Petkov, Eugene L. Venturini
Publikováno v:
Journal of Magnetism and Magnetic Materials. 331:156-161
Magnetic characterization of spherical, oxide-free, bcc iron nanoparticles synthesized with β-diketone surfactants has been performed. The results of this characterization, which included particles with diameters ranging between 2 and 5 nm show that
Autor:
Christian Bergemann, Natalie L. Adolphi, Todd C. Monson, Eugene L. Venturini, Richard S. Larson, Edward R. Flynn, Trace E. Tessier, Dale L. Huber, Helen J. Hathaway, Debbie M. Lovato, Danielle L. Fegan, Jason E. Jaetao, H.C. Bryant
Publikováno v:
Journal of Magnetism and Magnetic Materials. 321:1459-1464
Magnetite nanoparticles (Chemicell SiMAG-TCL) were characterized by SQUID-relaxometry, susceptometry, and TEM. The magnetization detected by SQUID-relaxometry was 0.33% of that detected by susceptometry, indicating that the sensitivity of SQUID-relax
Publikováno v:
Ferroelectrics. 377:120-136
Ceramic samples of Pb 0.99 La 0.01 (Zr 0.91 Ti0.09)O 3 were studied by dielectric and time-of-flight neutron diffraction measurements at 300 and 250 K versus pressure. Isothermal dielectric data (300/250 K) suggest structural transitions with onsets
Publikováno v:
Journal of Magnetism and Magnetic Materials. 320:2221-2227
We demonstrate through experiment and simulation that when mono-domain Fe nanoparticles are formed into chains by the application of a magnetic field, the susceptibility of the resulting structure is greatly enhanced (11.4-fold) parallel to the parti
Publikováno v:
Journal of Magnetism and Magnetic Materials. 278:311-316
We describe the synthesis of highly magnetic iron nanoparticles using a novel surfactant, a β-diketone. We have produced 6 nm iron nanoparticles with an unusually high saturation magnetization of more than 80% the value of bulk iron. Additionally, w
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 600:254-256
Neutron scattering experiments using triple axis spectrometers have been performed for the relaxor ferroelectric materials K1-xLixTaO3 (x = 0.05, 0.10) in order to study the behavior of the zone-center (ZC) transverse-optic (TO) phonon mode (ferroele
Publikováno v:
Journal of Materials Research. 14:4482-4488
We report the stability of TlBa{sub 2}CaCu{sub 2}O{sub 7} (Tl-1212) and Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub 8} (T1-2212) thin films and by inference, the stability of TlBa{sub 2}Ca{sub 2}Cu{sub 3}O{sub 9} (Tl-1223) and Tl{sub 2}Ba{sub 2}Ca{sub 2}Cu{su
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 9:2292-2295
Elongated, discontinuous defects provide strong vortex pinning and a corresponding large increase in critical current density in highly anisotropic Tl/sub 2/Ba/sub 2/CaCu/sub 2/O/sub x/ (Tl-2212) thin films. We generate controlled, amorphous damage r
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 9:1555-1558
Tl-2212 and Tl-1212 are the two easiest unsubstituted Tl-Ba-Ca-Cu-O superconducting thin films to grow. Both phases exhibit T/sub c//spl ges/95 K, J/sub c/(5 K)>10 MA/cm/sup 2/ and smooth morphologies. We report on the properties of both materials fo
Publikováno v:
Journal of Materials Research. 13:3349-3352
Epitaxial Tl2Ba2CaCu2O8 (Tl-2212) films ∼5500 Å thick are grown on LaAlO3(100) substrates using a new hybrid two-zone/crucible furnace process enabling precise control of thallination. This method combines the best features of both conventional cr