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  • 1
    Electronic Resource
    Electronic Resource
    Structural, magnetotransport, and micromagnetic properties of sputtered Ir(111)/Co superlattices (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 2479-2482 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This article presents a further study on the structural and magnetotransport properties in sputtered Ir(111)/Co superlattices. The magnetization loops and magnetoresistance curves show a correlation, which can be written as ΔR/R∝−(M/Ms)2 and indicates that the resistive change in external magnetic field is due to spin dependent scattering of conduction electrons, although the largest ΔR/R value observed is only 4% (10 K). The low effect can be attributed to band matching between Ir and Co subbands. Annealing effects on structural and magnetic properties were observed by the results that interdiffusion of the components takes place at an annealing temperature above 350 °C and leads to degradation of the superlattice, followed by a decrease both in magnetic moment and in magnetoresistance. The images of Kerr microscopy and magnetic force microscopy show micromagnetic structures, which can be well understood in comparison with the magnetization and magnetoresistance measurements. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.372206
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  • 2
    Electronic Resource
    Electronic Resource
    Structural and magnetotunneling investigations on La0.7Ca0.3MnO3/Al2O3 multilayers (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 89 (2001), S. 6760-6762 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Measurements of tunneling magnetoresistance (TMR) in La0.7Ca0.3MnO3/Al2O3 magnetic multilayers are reported with the emphasis on effects of the sample microstructure, arising from different substrates or varied deposition temperatures. Observed superlattice structures reveal a detailed structural information especially from the thin Al2O3 layers. Magnetotransport behaviors were measured below the Curie temperature of La0.7Ca0.3MnO3, showing a clear structural dependence. A large low-field TMR of about 65% was observed at 40 K from a trilayer junction. The improved temperature dependence of TMR is attributed to improved microstructure both in electrodes and thin barrier. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1356713
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  • 3
    Electronic Resource
    Electronic Resource
    Structure and solid state reactions of laser-deposited and sputtered Fe/Nb and Fe/Ag multilayers (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 1482-1487 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The structure of laser-deposited and sputtered Fe/Nb and Fe/Ag multilayers was investigated by x-ray diffraction. Significant differences in the textures, sharpness of the interfaces, and critical bilayer thicknesses for alloys are obtained for these two deposition processes. For small bilayer thicknesses, the measured x-ray-diffraction patterns were analyzed by computer simulations using a one-dimensional model, which includes the occurrence of amorphous or disordered interlayers between the crystalline layers and takes layer thickness fluctuations into account. These simulations indicate that already in as-prepared Fe/Nb multilayers thin amorphous interlayers exist and describe the thickness increase during an interdiffusion reaction already in the early stages of the transformation. In the case of Fe/Ag multilayers, the interfaces are disordered after deposition and first sharpen during annealing at about 250 °C, before grain coarsening occurs. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358897
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  • 4
    Electronic Resource
    Electronic Resource
    Giant magnetoresistance and interlayer coupling in Cu(111)/Ag67Co33 granular multilayers : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 4589-4591 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Cu/AgCo layered granular structures were prepared to study their field transport properties in comparison to their microstructure. The superlattices of the samples were characterized by x-ray diffraction. A combination of random and antiparallel alignments of magnetic particles is discovered expressing an oscillation of interlayer coupling similar to conventional multilayers. The weak antiferromagnetic coupling across thin Cu spacer layers between interfacial Co particles results in a notable enhancement of low-field sensitivity compared to granular single films. The oscillation period obtained here for Cu(111) interlayers is close to 3 atomic layers. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.365171
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    Paper (German National Licenses)
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