Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Alexander J. Shapiro"'
Autor:
Chia-Ling Chien, Robert D. Shull, V. I. Nikitenko, Yu. L. Iunin, Yu. P. Kabanov, Alexander J. Shapiro, L. Y. Zhu
Publikováno v:
IEEE Transactions on Magnetics. 46:2220-2223
We studied how the application of an in-plane field affects the asymmetries of the domain nucleation activity and domain wall velocity revealed previously in ultrathin Co films with perpendicular anisotropy. It is established that the asymmetries sur
Publikováno v:
Journal of Alloys and Compounds. 470:365-368
We report the synthesis and temperature-dependent transport properties of a new type II germanium clathrate, Cs8Na16Cu5Ge131 (space group F d 3 ¯ m ; a = 15.42000(9) A). In comparison to the parent compound Cs8Na16Ge136, Cu substitution for Ge on th
Publikováno v:
IEEE Transactions on Magnetics. 44:3048-3051
In this study the magnetic properties and the structure of Gd5Ge1.8Si1.8Sn0.4 alloy were investigated by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and magnetometry. The concentration of
Autor:
William F. Egelhoff, Alexander J. Shapiro, Ugo Bertocci, Jonathan J. Mallett, Thomas P. Moffat, Erik B. Svedberg, John Bovevich
Publikováno v:
ECS Transactions. 2:315-328
The electrodeposition of Cu1-xPtx alloys by underpotential co- deposition of Cu with Pt is demonstrated using an H2SO4-CuSO4- PtCl42- electrolyte. The composition and structure of 1 micrometer thick alloy films grown at different potentials were exam
Autor:
V. I. Nikitenko, C. L. Chien, Alexander J. Shapiro, Fengyuan Yang, V. S. Gornakov, Robert D. Shull
Publikováno v:
The Physics of Metals and Metallography. 101:S51-S55
We have studied FeMn/Ni81Fe19 bilayers using vectorial vibrating-sample magnetometry (VSM) and the magnetooptic-indicator-film (MOIF) technique and observed stationary antiferromagnetic (AF) domain walls throughout the hysteresis process. The FeMn/Ni
Autor:
Alexana Roshko, Youn-Seon Kang, Albert V. Davydov, Igor Levin, Norman A. Sanford, C. E. Stutz, Matthew H. Gray, Alexander J. Shapiro, Lawrence H. Robins, R. Cortez, J. E. Van Nostrand
Publikováno v:
physica status solidi (c). 2:2357-2360
GaN nanorods were grown on c-plane sapphire substrates under N-rich conditions by plasma-assisted molecular-beam epitaxy. Scanning electron microsopy revealed densely packed nanorods of hexagonal cross section with diameters ranging from roughly 40 t
Autor:
William J. Boettinger, Albert V. Davydov, G. L. Harris, Alexander J. Shapiro, Daniel Josell, Tsvetanka Zheleva, Abhishek Motayed, Igor Levin
Publikováno v:
physica status solidi (c). 2:2536-2539
Tungsten metal layer was used for the first time as an effective diffusion barrier for the standard Ti/Al/Ti/Au ohmic metallization scheme to obtain thermally stable ohmic contact suitable for high temperature applications. Comparative studies were p
Autor:
Albert V. Davydov, Alexander J. Shapiro, Safak Sayan, Igor Levin, Norman A. Sanford, Anneli Munkholm, Michael R. Krames, L. Wielunski, T. E. Madey
Publikováno v:
physica status solidi (c). 2:2783-2786
The refractive index and birefringence of InxGa1–xN films grown on GaN layers were measured by prism coupling used in conjunction with multilayer optical waveguide analysis. Samples with x = 0.036, 0.049, 0.060, and 0.066 were examined at the separ
Autor:
S. N. Mohammad, Damian Bryson, Youn-Seon Kang, A. G. Birdwell, M. M. E. Fahmi, W. R. Thurber, Mark D. Vaudin, Alexander J. Shapiro, Lawrence H. Robins
Publikováno v:
physica status solidi (c). 2:2800-2804
The electronic structure of Si-doped InyGa1−yAs1−xNx films on GaAs substrates, grown by nitrogen-plasma-assisted MBE, was examined by photoreflectance (PR) spectroscopy at temperatures between 20 K and 300 K. The measured critical-point energies
Autor:
Y Kadmon, P J. Chen, Erik B. Svedberg, William F. Egelhoff, L Gan, Hanania Ettedgui, Thomas P. Moffat, Robert D. McMichael, Mark D. Stiles, Cedric J. Powell, Alexander J. Shapiro, Jonathan J. Mallett
Publikováno v:
Journal of Magnetism and Magnetic Materials. 287:496-500
We have investigated the circumstances underlying recent reports of very large values of ballistic magnetoresistance (BMR) in nanocontacts between magnetic wires. We find that the geometries used are subject to artifacts due to motion of the wires th