Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Investigation of the mass diffusion of camphorquinone in amorphous poly(methyl methacrylate) and poly(tert-butyl methacrylate) hosts by the induced holographic grating relaxation technique (1986)
    s.l. : American Chemical Society
    Macromolecules 19 (1986), S. 1390-1394 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00159a018
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    FeTAB: An Ising-like 1D ferromagnet (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 5938-5940 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Continuing the investigation of the series of isostructural 1D magnets (CH3)3NHMX3⋅2H2O (M=Mn, Fe, Co, Ni, Cu, X=Cl, Br), we report on the first powder study of FeTAB,(CH3)3NHFeBr3⋅2H2O. X-ray studies show FeTAB to be isostructural with FeTAC, a good example of a 1D Ising ferromagnet. Low-temperature powder susceptibility data agree with the predicted susceptibility of a ferromagnetic 1D Ising model with an exchange constant of 4.0(1.0) K. Mössbauer spectroscopy has shown the ordering temperature to be near 1.3(1) K. The data imply that the ratio of the interchain to intrachain interactions (J'/J) is at least 10 times greater in FeTAB than in the chloride analog.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342156
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The switching mechanism in V2O5 gel films (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 729-733 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report the first explanation of the novel electrical switching in two-terminal devices based on thin V2O5⋅1.6H2O gel films. The switching is shown to be associated with the existence of a current-induced channel between the contacts. The data demonstrate that the switching between the "on'' and "off'' states of the device is driven by the joule heating of a metal-insulator (MI) transition in the channel material (or filaments in the channel). Resistivity data on the channel exhibit a sharp MI transition at T=334 K which is also the temperature at which the device is observed to stop switching. The signature of the MI transition in the channel is very similar to that observed in VO2(TMI=341 K), suggesting the channel may contain VO2−x conduction paths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341941
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Epitaxial silicide formation by multi-shot irradiation of Ni thin films on Si with Nd laser (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 4560-4565 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Uniform and epitaxial NiSi2 layers were obtained by consecutive irradiation of a Ni thin layer deposited onto Si with Nd-glass laser irradiation, 30-ns pulse duration, using up to 15 shots. The best quality epitaxial NiSi2 layer, for a 50-nm-thick Ni layer deposited on Si(111), was obtained with 10 shots of 1.3 J/cm2 energy density. The normalized minimum yield of the Ni signal amounted to 25%. The stability of the formed compound was investigated by furnace annealing in the 300–800 °C temperature range. After annealing at 300 °C-1 h backscattering and channeling analysis indicated a worsening of the epitaxial quality of the compound. X-ray diffraction patterns showed the presence of the NiSi silicide in addition to the NiSi2 silicide. At 500 °C-1 h annealing the reaction occurred over long distance and a large amount of NiSi was formed at the expense of the NiSi2 and the unreacted Ni. At 800 °C the epitaxial quality of the NiSi2 improved and the Ni minimum yield reached 10%. The NiSi2 was the only silicide present after irradiation and 800 °C-1 h annealing. Channeling analysis established also that the NiSi2 was b type: i.e., the silicide layer was rotated 180° about the surface normal 〈111〉 axis of the Si substrate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335360
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    A new amorphous magnetic material: iron indium telluride (Fe5(InTe4)2) (1989)
    s.l. : American Chemical Society
    Chemistry of materials 1 (1989), S. 404-406 
    Details
    ISSN: 1520-5002
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/cm00004a005
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Studies of depolarized and polarized Rayleigh–Brillouin spectra of a supercooled liquid: Salol (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 794-802 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: An extensive interferometric study of polarized and depolarized Rayleigh–Brillouin spectra of neat salol was carried out as a function of temperature and scattering angles. Considerable dispersion is observed in the isotropic spectrum, as manifested by the nonlinear temperature dependence in the longitudinal hypersonic frequency and a maximum in the linewidth. The relaxation behavior of the longitudinal hypersonic frequency is shown to be due to the bulk viscosity. Upon decreasing the sample temperature, the shear wave spectrum changes from diffusive to oscillatory behavior. In the oscillatory region, the shear wave frequency decreases linearly with increasing temperature and extrapolates to a vanishingly small value at the temperature at which the longitudinal acoustic wave linewidth is maximum. Curve fitting the VH spectrum to theory shows that the shear frequency is proportional to q; the shear wave linewidth and the rotation–translation coupling parameter to q2. These results are consistent with a linear viscoelastic theory, or the microscopic displacement density theory (taking in the small q limit) previously developed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451287
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Rayleigh–Brillouin scattering studies of segmental fluctuations in poly(siloxanes) (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 3405-3412 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: New results from a detailed temperature dependent Rayleigh–Brillouin study of siloxane polymers are reported. The study includes the examination of the effect of the relaxation of the longitudinal stress modulus on the propagation behavior of the thermally driven acoustic wave in the 109 Hz frequency range. The Rayleigh–Brillouin spectra of poly(diphenyl siloxane), poly(phenylmethyl siloxane) as well as their model analogs, 1,3-tetraphenyl 1,3-dimethyl disiloxane, and 1,3-diphenyl 1,2-tetramethyl disiloxane are measured over a wide range of temperature covering from Tg to 240 K above Tg. The theory for Rayleigh–Brillouin scattering has also been reformulated in such a way that the parameters which enter the theory are in terms of easily recognizable thermodynamic and transport coefficients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.448943
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Studies of mass diffusion of camphorquinone in linear and crosslinked polystyrene by the laser induced holographic relaxation technique (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 5359-5364 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Laser induced holographic grating relaxation studies of camphorquinone (CQ) diffusing in liner polystyrene (PS) (with both narrow and wide molecular weight distribution) and crosslinked PS (with bis-phenol-A-dimethacrylate as the crosslinking agent) are carried out. Diffusion coefficients of CQ in the polymer hosts are obtained from the decay rate of the intensity diffracted from the laser induced holographic grating. The diffusion coefficients (D) of CQ in polydispersed PS samples are compared with that in nearly monodispersed sample. Diffusion coefficients are found to be equal in both types of polymer samples over the whole temperature range studied, thereby indicating that at high molecular weight the molecular weight distribution has little effect on the diffusion coefficient of CQ. The diffusion coefficient of CQ in crosslinked PS is found to decrease with increasing concentration of the crosslinking agent. It decreases approximately 30 times as the concentration of the crosslinking agent increases to 20%. The relationship between the concentration of the crosslinking agent and polymer free volume is discussed. The diffusion coefficients of CQ in linear and crosslinked PS are also measured as a function of temperature. It is found that the temperature dependence of both D and D/T can be described by a Williams–Landel–Ferry (WLF) equation. However, the WLF constants C1 and C2 differ in both fits. The C2 constant obtained from the D/T vs T fit for linear PS sample agrees with that extracted from the viscoelastic measurement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451822
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Comment on: "Quantum scattering via the S-matrix version of the Kohn variational principle'' (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 4454-4454 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Rescigno and Schneider(ref.2), have suggested a simplification in the S−matrix version of Kohn variational method. It is pointed out that their idea works not only for electron−atom/molecule scattering, but also for heavy particle reactive scattering. Applications to atomic hydrogen and fluorine reactions with molecular hydrogen are considered.(AIP)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454784
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    High resolution microcalorimeters as detectors for inelastic scattering (invited) : INTERNATIONAL CONFERENCE ON SYNCHROTRON RADIATION INSTRUMENTATION (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 1557-1560 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Small thermal calorimeters operated at temperatures near 100 mK are sufficiently sensitive to detect single photons, measuring the deposited energy to accuracies approaching 1 eV. A test device has demonstrated 17-eV FWHM for 6-keV x-rays—almost an order of magnitude better than a conventional Si(Li) solid state detector. Further improvement requires the development of monolithic fabrication techniques to reduce the parasitic heat capacities introduced in assembling a discrete device. Current technology should permit the construction of a detector about 1/2 mm2 with good efficiency for 35-keV x-rays and a resolution near 25 eV. The ultimate resolution achievable in practice and the tradeoff of collecting energy for resolution depend primarily on the low-temperature specific heat of the material used to absorb the x-rays and efficiently thermalize their energy. Finding the optimum absorber is particularly important at higher photon energies. We are studying absorbers that may offer considerably improved performance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1141034
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...