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  • 1
    Electronic Resource
    Electronic Resource
    Thermal lens scanning of the glass transition in polymers (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 89 (2001), S. 2220-2226 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In this article we discuss the use of the thermal lens technique for investigating the thermal properties of polymers as a function of temperature. It is also discussed how the experimentally determined thermal lens parameters can be used to locate the glass transition in polymers. The methodology is tested using a solution casted films of poly(vinyl chloride) as a testing sample. A comparison with conventional differential scanning calorimetry data is made. It is proposed that the current transient thermal lens methodology, with minor changes in its experimental configuration, could be adapted to develop a new methodology called differential thermal lens scanning especially designed for the investigation of the phase transitions in polymers. It is shown that this new methodology could be equally used for the measurement of the thermal expansion coefficient, above and below the glass transition. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1333737
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  • 2
    Electronic Resource
    Electronic Resource
    Resonant microwave cavity response of amorphous ribbons : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 5462-5464 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In this study we report microwave experiments on the amorphous ribbon Fe4.6Co70.4Si15B10 using the usual setup for magnetic resonance experiments at 9.4 GHz to observe the cavity response. Several samples cut from the same tape were annealed, either in the presence or in the absence of a magnetic field. For each sample the magnetization and magnetoimpedance (MI) curves were obtained, with MI ratios between 1% and 40%. The magnetic resonance spectrum consists of the usual ferromagnetic line and an anomalous low field cavity response for H〈100 Oe. The shape of this low field signal depends on the thermal treatment and on the orientation of the external field. We believe that this signal is in part a ferromagnetic peak but it also carries information of the skin-depth changes with a sweeping magnetic field. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.362273
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  • 3
    Electronic Resource
    Electronic Resource
    Evolution of the electronic specific heat of (La1−xCex)3Al : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 4179-4181 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The specific heat of (La1−xCex)3Al was measured in the temperature range from 2 to 30 K as function of the Ce concentration. The electronic specific heat for small x is close to the normal metal value (14 mJ/K2 mol f.u.), increasing to a maximum of 410 mJ/K2 mol Ce for x∼0.4, characterizing a heavy-fermion behavior around this concentration. Above this critical concentration, the electronic specific heat decreases to 140 mJ/K2 mol Ce for x=1. From the fitting of the experimental data to Debye and Schottky type Kondo and crystal field contributions we estimated the Kondo temperature, θD, Δ1, and Δ2. TK was found to increase with Ce concentration. Our results are interpreted in view of the competition between Kondo effect and Ruderman–Kittel–Kasuya–Yosida interaction. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.365112
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  • 4
    Electronic Resource
    Electronic Resource
    Magnetic resonance in PdFe alloys near Tc : 38th Annual Conference on Magnetism an Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 7125-7127 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetic resonance results in Pd1−xFex, with various Fe concentrations, are reported. The samples were prepared in the form of foils, 200 and 100 μm thick, and Fe concentrations of 0.2, 0.5, 1.0, and 1.5 at. %. The experiments were carried out at low temperature, close to the Tc of each alloy. For the more concentrated alloys and magnetic field perpendicular to the foil, more than one line is observed. The anomalies in the resonance spectrum are interpreted in terms of the existing giant moments in these alloys.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.356985
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    Paper (German National Licenses)
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