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We present tunneling experiments on Fe~001!/MgO~20 Å!/FeCo~001! single-crystal epitaxial junctions of high quality grown by sputtering and laser ablation. Tunnel magnetoresistance measurements give 60% at 30 K, to be compared with 13% obtained recently on ~001!-oriented Fe/amorphous-Al2O3 /FeCo tunnel junctions. This difference demonstrates that the spin polarization of tunneling electrons is n...

Although epitaxial growth has been traditionally monitored by reciprocal space techniques, such as reflection highenergy electron diffraction (RHEED), the development of surface-sensitive imaging techniques, such as scanning tunneling microscopy (STM), allows for monitoring in the real-space. RHEED averages information over relatively large sample regions, and is thus more representative of the...

The sputter-induced epitaxy change of in-plane orientation occurring in YBa2Cu3O72x (001) thin films grown on MgO (001) substrates by pulsed organo-metallic beam epitaxy (POMBE) is investigated by a series of film growth and characterization experiments, including RBS and TEM. The factors influencing the orientation change are systematically studied. The experimental results suggest that the su...

MgO/Fe/Au(001) and Au/Fe/Au(001) trilayers with Fe layer thickness from 0.4 to 1.2 nm were grown by the molecular beam epitaxy (MBE) method, perpendicular magnetic anisotropy (PMA) magnetization dynamics of studied. The MgO/Fe/Au trilayer exhibited a slightly larger interface than Au/Fe/Au trilayer, effective both decreased increasing due shape anisotropy. g-factor bulk value decreasing thickne...

Carotid bifurcation stenosis may coexist simultaneously with more proximal common carotid artery (CCA) atherosclerotic plaquing, primarily at the vessel origin in aortic arch. Obtaining long-term outcomes data is vital to making any definitive conclusions on efficacy of performing this dual treatment. Four cohorts were created for perioperative outcome analysis and Kaplan-Meier freedom from eve...