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Now showing items 141-151 of 151

  • Three-state dual spin valve structure 

    COEY, JOHN MICHAEL DAVID (2010)
    A dual spin valve is built with exchange bias on the top and bottom pinned layers and a central free layer. By suitable choice of the antiferromagnetic and ferromagnetic layer thicknesses, it is possible to separate the ...
  • Torque in nested Halbach cylinders 

    WEAIRE, DENIS LAWRENCE; COEY, JOHN MICHAEL DAVID (IEEE, 1999)
    Permanent magnet variable flux sources are produced by rotating two nested N-segment, permanent magnet, Halbach cylinders. Torque is primarily an end effect, determined by field non-uniformities due to the fmite length ...
  • Torque in nested Halbach cylinders 

    Ni Mhiochain, T.R; WEAIRE, DENIS LAWRENCE; MCMURRY, SARA; COEY, JOHN MICHAEL DAVID (IEEE, 1999)
  • Torque in nested Halbach cylinders 

    Ni Mhiochain, T.R.; WEAIRE, DENIS LAWRENCE; MCMURRY, SARA; COEY, JOHN MICHAEL DAVID (IEEE, 1999)
  • Transport characteristics of magnetite thin films grown onto GaAs substrates 

    VAN, DIJKEN SEBASTIAN; COEY, JOHN MICHAEL DAVID (IEEE, 2004)
    Magnetite thin films with a preferred (111) orientation have been deposited by reactive dc magnetron sputtering from a pure Fe target onto (100) GaAs substrates at 400??C. The films show a clear Verwey transition in both ...
  • Transport properties of Bi2Sr2Can-1CunO2 n+4 thin films 

    COEY, JOHN MICHAEL DAVID (American Physical Society, 1994)
    The Hall effect and resistivity have been measured in Bi2Sr2Can-1CunO2n+4 (n=2 and 3) thin films as a function of magnetic field and temperature. In the normal state, the ratio of the normal resistivity to the Hall resistivity ...
  • Tunnel magnetoresistance of disordered low-moment Co2MnSi Heusler alloy films 

    VENKATESAN, MUNUSWAMY; COEY, JOHN MICHAEL DAVID (American Institute of Physics, 2005)
    Thin films of Co(1?x?y)MnxSiy (x = 0.18?0.26 and y = 0.23?0.29) were deposited from elemental targets onto thermal-oxidized Si substrates at room temperature using dc magnetron cosputtering. The as-deposited films appear ...
  • Tunneling processes in asymmetric double barrier magnetic tunnel junctions with a thin top MgO layer 

    COEY, JOHN MICHAEL DAVID (2013)
    Dynamic conductance dI/dV and inelastic electron tunneling spectroscopy (IETS) d 2I/dV 2 have been measured at different temperatures for double barrier magnetic tunnel junctions with a thin top MgO layer. The resistance ...
  • Vector vibrating-sample magnetometer with permanent magnet flux source 

    COEY, JOHN MICHAEL DAVID (American Institute of Physics, 2006)
    A compact magnetometer, which uses two nested 1?T Halbach cylinders to generate a variable magnetic field of up to 2?T in any direction in the xy plane, has two sets of quadrupole pickup coils to detect the components mx ...
  • Very low 1/f barrier noise in sputtered MgO magnetic tunnel junctions with high tunneling magnetoresistance 

    COEY, JOHN MICHAEL DAVID (2012)
    Low frequency 1/f barrier noise has been investigated in sputtered MgO magnetic tunnel junctions(MTJs) with a tunnelingmagnetoresistance ratio of up to 330% at room temperature. The lowest normalized noise parameter ? of ...
  • Vortex states in soft magnets in two and three dimensions 

    COEY, JOHN MICHAEL DAVID; DIAO, ZHU; VENKATESAN, MUNUSWAMY (2010)
    The magnetization curves of arrays of near-spherical soft ferromagnetic particles are compared with those of quasi-two-dimensional dots with similar radius prepared by a rapid e-beam lithographic technique. Curves for the ...