ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
    Nucleation of Crystals under Langmuir Monolayers: Kinetic and Morphological Data for the Nucleation of Ice (1994)
    s.l. : American Chemical Society
    Langmuir 10 (1994), S. 1673-1675 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00018a012
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Field-induced intensity and Stark shift measurements of the electric dipole moment of ICl in the B 3Π0+ state (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 5464-5472 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The laser-induced fluorescence spectrum in ICl of the (2'–0‘) vibrational band in the B 3Π0+–X 1Σ+ electronic system has been measured as a function of the electric field strength up to 32.5 kV/cm. Field-induced intensity measurements on I35Cl have been used to determine the magnitude and sign of the electric dipole moment μB in the B state relative to the magnitude and sign of the moment μX in the X state. From the intensity ratio of the field-induced line Q(0) to the allowed Stark component P(1,0), which has the same upper state, it was found that μB/μX=+(0.888±0.051). The positive sign indicates that the polarity is the same in the B and the X states. Intensity ratio measurements for Q(0) to R(5) and for Q(1) to R(5) yield similar (but less precise) results. In order to test this first application of the method to excited electronic states, Stark shift measurements were carried out on a number of P-branch Stark components. It was found for I35Cl that ||μB/μX||=(0.8984±0.0036), in good agreement with the intensity measurements. The corresponding determination for I37Cl is that ||μB/μX||=(0.900±0.014). The present results are in agreement with those obtained earlier from studies of the absorption spectrum by Watanabe et al. [Jpn. J. Appl. Phys. 31, 901 (1992)].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.467335
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Self-channeling of magnetostatic waves in ferromagnetic film (abstract) : 38th Annual Conference on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 5630-5630 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Low power magnetostatic wave (MSW) experiments reporting beam formation and propagation inside ferromagnetic films have been carried out .1,2 In this work, we report the first observation of self channeling of MSW and the formation of the spatial solitons of MSW for an in-plane magnetized YIG film and waves propagating perpendicularly to the direction of magnetization. The experiments were conducted using YIG film of 4.9 μm thickness magnetized in-plane by a permanent magnetic field of 1094 Oe. A cw signal was launched into the film through a microstrip antenna. A Brillouin scattering system consisting of a tandem Fabry–Perot interferometer has been used to observe the profile of a MSW beam. Self-channeling MSW beam propagation occurring as a result of an interplay between diffraction of the beam and self-modulation was observed for various magnitudes of input power and initial frequency. At low power levels the formed MSW beam broadens and weakens during the propagation. As the input power increases, the intensity of the peak power of the beam also increases and a narrow channel of the MSW beam is formed. The power threshold depends on the wavelength of MSW and the width of the excitation microstrip. A theory describing the spatial MSW self-channeling is developed. The necessary and sufficient conditions are analyzed and numerical calculations are provided. The experimental data are in a semi-quantitative agreement with theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355665
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Magnetic transitions at high fields in (Fe,Mn)3Si alloys : The 6th joint magnetism and magnetic materials (MMM)-intermag conference (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 6359-6361 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In the series of ordered DO3 solid solutions Fe3−xMnxSi, field-induced transitions have previously been found to occur for antiferromagnetic alloys with values of x near 1.70. The present work has determined a region of composition in which antiferromagnetism is the low-field, low-temperature state and gives the variation of the critical field as a function of temperature and composition. The critical field decreases approximately quadratically with temperature and rises to beyond 6 T in the range of composition from 1.6≤x≤1.8. Neutron diffraction indicates that the antiferromagnetic axis is shifted from the [111] direction and that in a 5 T field the antiferromagnetic component of the scattering is reduced considerably from that in zero field. However, no corresponding increase in ferromagnetic component is observed within experimental error and Arrott plots suggest the high-field state is still largely antiferromagnetic.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358266
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    High field transitions in (FeMn)3Si alloys : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 5671-5673 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic ordering in the series of solid solutions Fe3−xMnxSi having the D03 structure has been extensively studied at low fields over a wide range of temperatures. The present study reports observations of high-field-induced transitions in the low temperature range below the reordering temperature TR for members of the series falling within the concentration range 1.6≤x≤1.8. These alloys appear antiferromagnetic in low fields below TR but application of a field within the range up to 12 T results in a transition to an apparently ferromagnetic state. The transition occurs at all temperatures below TR and occurs reversibly except at the lowest temperatures where the hysteresis may be ∼0.5 T. The variation of the critical field with temperature follows an approximately quadratic form. Above TR Arrott plots suggest for the alloy with x=1.70 that a narrow ferromagnetic regime exists over the range 65≤T≤85 K above which the material is paramagnetic. For the alloy with x=1.75 however the Arrott plots suggest a direct conversion to paramagnetism at the reordering temperature TR indicating a possible phase diagram similar to that of Au2Mn. A discussion is given in terms of a model previously proposed to explain the low-field behavior.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.353586
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Structural and magnetic properties of Co(AlV) alloys (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 5271-5273 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetization and magnetic susceptibility measurements have been made over a wide range of temperature for the alloy series CoAl1−xVx for 0≤x≤0.5. Neutron diffraction measurements have also been made at room temperature using the Rutherford Appleton Laboratory spallation source (ISIS). The observed intensities suggest that for x≤0.25 the structure is the singly ordered B2 (CsCl) structure with the V atoms occupying Al sites. Beyond this concentration a model in which double ordering of the L21 (Heusler) type with the V atoms favoring one of the two equivalent Al sites seems consistent with the results. The magnetization measurements indicate that the series becomes ferromagnetic for x〉∼0.1 with the intrinsic magnetization σ rising to a maximum of ∼50 emu. g−1 at x=0.5 for which the Curie temperature TC is ∼320 K. The inverse susceptibilities are generally linear with temperature and almost independent of concentration for x〉0.2, suggesting an itinerant interpretation. The maximum values of TC and σ reached are less than half those achieved in the corresponding CoAl1−xMnx system but comparable with those seen in the CoAl1−xCrx system. Comparisons with the isoelectronic CoGa system are drawn. The results have relevance to theoretical estimates of impurity moments in CoAl and CoGa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344634
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Magnetic clusters in FeAl1−xCux alloys: SANS measurements (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 5973-5975 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Although the annealed equiatomic alloy FeAl is paramagnetic, the series of alloys represented by the formula FeAl1−xCux becomes ferromagnetic for x≥0.27, beyond which the Curie temperature rises rapidly. It is thought that the magnetization in high fields arises from saturated clusters in an itinerant matrix. Five of these alloys (having x=0.25, 0.28, 0.30, 0.325, and 0.35) have been examined in powder form over the range 4–300 K using SANS at ILL, Grenoble. The paramagnetic alloy with x=0.25 shows a featureless, temperature-independent scattering pattern with some forward peaking which may arise primarily from surface scattering. In contrast, the results for the ferromagnetic alloys show marked features which can be linked to the magnetic properties; that for the alloy with x=0.325 is especially remarkable in that very weak critical scattering is seen near the Curie temperature with a much larger Q-dependent peak at about 50 K. These features are very similar in form to those reported for the alloy Fe70Al30 in which the ferromagnetism is thought to be broken up at low temperatures by random fields arising from dynamic magnetic clusters, leading to a reentrant (super)paramagnetism that freezes at lower temperatures into a cluster glass state. The correspondence between the two systems seems substantial.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.346032
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Oxygen and fluorine atom kinetics in electron cyclotron resonance plasmas by time-resolved actinometry (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 611-620 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The kinetics of O and F atoms in O2-based plasmas has been studied by time-resolved optical emission spectroscopy (actinometry) in modulated plasmas. The sticking coefficient αO of O atoms on the stainless-steel reactor walls was 0.09±0.01 in O2 plasmas containing fluorine (added as either SF6 or F2), but was about 0.5 in a pure O2 plasma. This explains the significant increase in steady-state O density as a few percent of fluorinated gas is added. The corresponding value for F atoms, αF, was 0.06±0.01, almost independent of conditions. The method also indicates the relative importance of the different electron-impact-induced mechanisms (direct excitation of ground-state atoms and dissociative excitation of feedstock molecules) for the production of emitting atoms [O 3p3P (844 nm) and F 3s2P (703 nm)] in plasmas. These results show that the widely used (steady-state) actinometry technique using 844-nm emission from O 3p3P atoms is an unreliable measure of ground-state [O] variations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.349662
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Anomalous low-frequency butterfly curves for subsidiary absorption and ferromagnetic resonance overlap at 3 GHz (abstract) (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 5642-5642 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Subsidiary-absorption butterfly curves of spin-wave-instability threshold versus static in-plane field have been obtained for yttrium-iron-garnet (YIG) thin films at 3 GHz. The butterfly curves have been found to be rather anomalous, typically displaying a pronounced dip and a very low minimum threshold. These anomalous features are attributed to the overlap of the subsidiary-absorption field region with ferromagnetic resonance (FMR). First-order instability theory was extended to include the uniform-mode response near FMR. The extended theory yields good fits to the data for reasonable values of the YIG FMR linewidths. The theoretical analysis also shows a predicted flip in the azimuthal propagation angle φk for the unstable spin waves in the region of FMR overlap. With increasing field, there are predicted discontinuous changes in φk from 90 ° to 0 ° and back to 90 ° in the region of FMR.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.345912
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Anomalous low-frequency butterfly curves for subsidiary and ferromagnetic resonance overlap at 3 GHz (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 1569-1573 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Subsidiary absorption butterfly curves of spin-wave instability threshold versus static in-plane field have been obtained for yttrium iron garnet (YIG) thin films at 3 GHz. The butterfly curves have been found to be rather anomalous, typically displaying a pronounced dip and a very low minimum threshold. These anomalous features are attributed to the overlap of the subsidiary absorption field region with ferromagnetic resonance (FMR). First-order instability theory was extended to include the uniform mode response near FMR. The extended theory yields good fits to the data for reasonable values of the YIG FMR linewidths. The theoretical analysis also shows a predicted flip in the azimuthal propagation angle φk for the unstable spin waves in the region of FMR overlap. With increasing field, there are predicted discontinuous changes in φk from 90° to 0° and back to 90° in the region of FMR.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347251
    Location Call Number Expected 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...