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  • 1995-1999  (2)
  • 1980-1984  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Giant room-temperature magnetoresistance in the FeRh alloy (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 66 (1995), S. 3061-3063 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetoresistance of the FeRh alloy has been measured in the temperature range 200–300 K using high pulsed magnetic fields up to 36 T. This compound shows a first-order magnetic transition from the antiferromagnetic (AF) low-temperature state to the ferromagnetic (F) high-temperature state at TAF–F=405 K. The F state is very close in energy to the AF state and can be reached by applying a magnetic field. The measurements made within the AF state show that the AF–F transition is accompanied by a giant magnetoresistance effect (ΔR/R≈50%). © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.114278
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  • 2
    Electronic Resource
    Electronic Resource
    High strength and high conductivity composite wires for high pulsed magnet (1996)
    Springer
    Mechanics of composite materials 31 (1996), S. 377-383 
    Details
    ISSN: 1573-8922
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Magnets for high pulsed magnetic fields require a winding with high electrical conductivity, high strength, high heat capacity, and a softening temperature greater than 300 °C. Different conductors, developed on DRET contracts, are presented. The ultimate tensile stress at room temperature of macrocomposites, where the reinforcement is either a jacket or fibres, checks the rule of mixtures, whereas σuts of Cu/Nb nanocomposites with continuous Nb nanofibres exhibit a very interesting deviation from the rule of mixtures leading to σuts(77K) = 1206 MPa for 30% Nb.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00632627
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Quantum cyclotron resonance in silicon (1983)
    Springer
    International journal of infrared and millimeter waves 4 (1983), S. 575-589 
    Details
    ISSN: 1572-9559
    Keywords: Quantum cyclotron resonance ; pulsed magnetic fields ; Silicon ; valence bands ; non-parabolicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Quantum effects in the cyclotron absorption of thermally excited holes in the valence bands of Si are demonstrated for the first time. They become evident in the dependence of the cyclotron absorption spectra on uniaxial stress. The spectra were taken with fixed infrared excitation from an HCN laser (ħω=3.68 meV) and pulsed magnetic fields up to 35 Teslas. The uniaxial stress parallel to the magnetic field in 〈100〉 and 〈111〉 direction reached 10 kbars, the crystal temperature was set between 30 and 60 K. The interpretation of the measured spectra is possible using the stress-dependence of Landau level dispersion, which is calculated by numerical diagonalization of a Hamiltonian for the sixfold degenerate valence band maximum (split by spin-orbit coupling into J=3/2 and J=1/2 states). The small spin-orbit splitting in Si of 44 meV is responsible for an efficient coupling between light-hole and split-off-band and results, even in the high-stress-limit, in a remarkable non-parabolicity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01009396
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    Paper (German National Licenses)
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