Observation of a high negative spin polarization at the Fe/MgO(100) surface oxidized at room temperature

Kurahashi, M.; Sun, X.; Entani, S.; Yamauchi, Y.
September 2008
Applied Physics Letters;9/29/2008, Vol. 93 Issue 13, p132505
Academic Journal
Spin polarization of an Fe/MgO(100) surface oxidized at room temperature has been analyzed with a spin-polarized metastable helium beam, which is an extremely surface sensitive spin probe, under high magnetic fields (0–50 kOe). The spin polarization of the Fe surface, although it initially decays with oxygen exposure, increases at >20 L (1 L=10-6 Torr sec) and becomes comparable to that observed for a clean Fe surface at >100 L. The polarization is negative and especially high at around the Fermi level. This may be understood if we assume the formation of Fe3O4.


Related Articles

  • Towards high-power mid-infrared emission from a fibre laser. Jackson, Stuart D. // Nature Photonics;Jul2012, Vol. 6 Issue 7, p423 

    The diverse output pulsewidths, linewidths and polarization states of fibre lasers provide both high efficiency and high output power in a small, low-maintenance format that is ideal for applications throughout research, defence and industry. New directions are constantly being pursued to...

  • Experimental Realization of Hyper-Entangled Two-Photon States. Barbieri, M.; Cinelli, C.; De Martini, F.; Mataloni, P. // AIP Conference Proceedings;2004, Vol. 734 Issue 1, p253 

    We report on the experimental realization of hyper-entangled two photon states, entangled both in polarization and momentum. These states are produced by a high brilliance parametric source of entangled photon pairs with peculiar characteristics of flexibilty of state generation. The...

  • Connectors reduce costs and increase flexibility.  // EDN;10/14/2004, Vol. 49 Issue 21, p121 

    This article offers information on several connectors from Samtec, Inc. These systems feature polarization to prevent incorrect mating and audible clicks to verify proper seating on 0.0025-, 0.0787-, and 0.1-inch pitch, respectively. The LSS Series on 0.025-inch pitch provides full shrouding,...

  • Constrained ferroelectricity in the (001)-textured superlattices of PbZrO3/BaZrO3. Wu, Tai-Bor; Hung, Cheng-Lung // Applied Physics Letters;3/14/2005, Vol. 86 Issue 11, p112902 

    A constrained ferroelectricity is found in the (001)-textured PbZrO3/BaZrO3 superlattice films having an average composition of (Pb0.75Ba0.25)ZrO3, which is characterized by the linear dependence of remanent polarization (Pr) and coercive field (Ec) on the applied voltage and its stability...

  • Spin polarization of currents in Co/Pt multilayer and Co–Pt alloy thin films. Rajanikanth, A.; Kasai, S.; Ohshima, N.; Hono, K. // Applied Physics Letters;7/12/2010, Vol. 97 Issue 2, p022505 

    The point contact Andreev reflection technique was employed to estimate the spin polarization of currents in Co/Pt multilayered thin film and Co–Pt alloy film with perpendicular anisotropy. The spin polarization of currents in the Co–Pt alloy film was estimated to be 0.48, while...

  • The dipole moments of the excited states of FeC. Tzeli, Demeter; Mavridis, Aristides // Journal of Chemical Physics;2/1/2005, Vol. 122 Issue 5, p056101 

    With the purpose of comparing expectation dipole moment values 〈μ〉 with finite-field obtained dipole moments μFF, we recalculated by the finite-field method previously reported 〈μ〉 values of 38 excited states of FeC. In most of the cases μFF is significantly...

  • Molecular geometry and polarizability of small cadmium selenide clusters from all-electron ab initio and Density Functional Theory calculations. Karamanis, Panaghiotis; Maroulis, George; Pouchan, Claude // Journal of Chemical Physics;2/21/2006, Vol. 124 Issue 7, p071101 

    We have calculated molecular geometries and electric polarizabilities for small cadmium selenide clusters. Our calculations were performed with conventional ab initio and density functional theory methods and Gaussian-type basis sets especially designed for (CdSe)n. We find that the dipole...

  • van der Waals forces between nanoclusters: Importance of many-body effects. Hye-Young Kim; Sofo, Jorge O.; Velegol, Darrell; Cole, Milton W.; Lucas, Amand A. // Journal of Chemical Physics;2/21/2006, Vol. 124 Issue 7, p074504 

    van der Waals interactions between nanoclusters have been calculated with a self-consistent, coupled dipole method. The method accounts for all many-body (MB) effects. Comparison is made between the exact potential energy, V, and the values obtained with two alternative methods: the sum of...

  • Appearance of a Debye process at the conductivity relaxation frequency of a viscous liquid. Richert, Ranko; Agapov, Alexander; Sokolov, Alexei P. // Journal of Chemical Physics;3/14/2011, Vol. 134 Issue 10, p104508 

    The existence of a Debye-type ultraslow process in dielectric spectra of bulk polyalcohols and similar materials has been reported repeatedly in the recent literature. Its loss peak is observed at frequencies that are decades below those of the primary structural relaxation, in a range where the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics