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  • 1990-1994  (4)
  • 1985-1989  (1)
  • 1905-1909  (1)
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  • 1990-1994  (4)
  • 1985-1989  (1)
  • 1905-1909  (1)
  • 1955-1959  (1)
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Keywords
  • 1
    Electronic Resource
    Electronic Resource
    On the modification of the Kondorsky function (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 3184-3187 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The validity of Kondorsky's switching field distribution for pinning magnets with rectangular hysteresis loops is extended to cases where the hysteresis loops are influenced by reversible rotation of the magnetization vectors in the domains. Caused by this influence, the monotonic Kondorsky function changes to modified Kondorsky functions HP(cursive-theta0) with minimal switching fields for orientation angles cursive-theta0(approximately-greater-than)0° when HP(cursive-theta0 = 0°) reaches the anisotropy field strength Ha. It is shown that the modified Kondorsky function is a more suitable description of experimental results in the literature than the Kondorsky function itself.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.349301
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A new method to determine the switching field distribution with application to barium ferrite powder (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 2465-2470 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A method to determine the switching field distribution Hs((large-closed-square)cr〉gc0) of powder assemblies of magnetically hard materials with a random orientation of the easy axes is described. The method is based on the ferromagnetic resonance absorption and the measurements of remanence curves. Direct information about the switching field distribution is obtained from major and minor loops of the hysteresis of the microwave absorption loss. By fitting calculated remanence curves and measured remanence curves the switching field distribution and its distribution at each orientation angle (large-closed-square)cr〉gc0 is obtained. The application of this method leads to switching field distributions for coprecipitated barium ferrite, which are strongly correlated to the predictions of the theory of coherent rotation. The distribution of Hs for this sample is made narrower by an etching process or by magnetic dilution. For barium ferrite prepared by the conventional oxid ceramic method with additional milling, a monotonic increase of the switching field with increasing orientation angle is found. This increase is much smoother than the Kondorsky function provides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348683
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Determination of angular dependence of the critical field of barium ferrite from remanence and microwave measurements (abstract) (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 6000-6000 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The distribution of the critical field of nontextured polycrystalline ferrite is determined. Barium ferrite samples are saturated in one direction and measured with a field H applied at an angle θ to the saturation field. The measured quantities are the remanent magnetization and the microwave hysteresis including minor loops. Especially the microwave absorption curves allow direct analysis of the critical field as a function of the orientation angle cursive-theta0 between H and the easy axis. Starting with these data a fit of the calculated to the measured remanence curves yield the distribution. The figure shows the critical field distribution of a ferrite sample with large coercivity. Additionally the calculated and measured resonance fields ares are given. All field strengths are normalized to the anisotropy field, which can also be determined from the microwave measurement.1
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342130
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Subthreshold antiproton andK − production in heavy ion collisions (1994)
    Springer
    The European physical journal 350 (1994), S. 101-113 
    Details
    ISSN: 1434-601X
    Keywords: 25.70.Np
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Subthreshold ¯p andK − and energeticπ − production was studied in Ne + NaF, Cu, Sn and Bi, and in Ni + Ni collisions with incident energies between 1.6 and 2 GeV/u. The measured cross sections indicate a dominant contribution of baryonic resonances. This is also consistent with a generalized scaling behaviour of the cross sections with the energy available in the collision and the energy necessary to produce particles as observed with Ne induced reactions. Deviations from scaling especially pronounced in the Ni-Ni system will be discussed in terms of absorption effects. The flat slope of the excitation function for ¯p production can be related to a reduced production threshold caused by a reduction of the antiproton mass in the dense and heated medium by about 100—150 MeV/c2. A similar in-medium mass reduction is also indicated forK − mesons. An increased ¯p reabsorption probability for the heavier systems is concluded from the comparison of the ¯p yields in Ne + NaF, Ne + Sn and Ni + Ni collisions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290678
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Östradiolpflaster mit vierteljähriger oraler Gestagenzugabe in der Postmenopause (1993)
    Springer
    Archives of gynecology and obstetrics 254 (1993), S. 300-302 
    Details
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Schlußfolgerung Bereits praktisch erprobte Therapieregime mit Zugabe von Gestagen in längeren als monatlichen Intervallen können unter Beobachtung bestimmter Vorsichtsmaßnahmen befürwortet werden: 1. Nur Frauen in der späten Postmenopause. 2. Ausreichendhohe Gestagendosis. 3. Regelmäßige vaginalsonographische Kontrolle v.a. zu Beginn der Behandlung, um die Zeitpunkte der hormonellen Kurettage zu bestimmen und 4. Abklärung von Zwischenblutungen. Die Akzentanz solcher Therapieschemata ist auch unter Langzeitbedingungen sehr hoch.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02266001
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Ueber Siliconium-, Boronium- und Titanoniumsalze. Zum Theil gemeinschaftlich mit (1906)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 344 (1906), S. 300-313 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.19063440305
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    Paper (German National Licenses)
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