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  • 1985-1989  (30)
  • 1965-1969  (1)
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 1561-1564 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The present communication focuses on a critical micromagnetic discussion of the promising analytical possibilities with regard to ferromagnetic fine structures offered by the recent invention of magnetic force microscopy. As a result, some limiting constraints for the analysis of soft and hard ferromagnetic media are derived which have to be taken into account for an interpretation of the experimental results.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 62 (1987), S. 4918-4920 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The motion of Néel lines along subdivided 180° Bloch walls has been investigated on iron whisker single crystals by indirect optical observation through the influence on Bitter patterns. The field-induced displacement of the lines is dominated by microscopic Barkhausen jumps, where the lines exhibit a striking flexibility along their longitudinal extent. Phenomena such as line fusion, line nucleation, and interactions with crystal defects have been investigated more closely.
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  • 3
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 167-171 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The influence of local crystalline defects upon the magnetization reversal process of single-crystalline iron whiskers has been investigated by direct observation of the domain configuration and by inductive magnetization measurements. As an essential result, the investigations bring to evidence that only weak interactions are obtained between the dislocations and 180° Bloch walls. On the other hand, a strong pinning efficiency to 90° Bloch walls is observed which is due to the stress field created by the perturbation.
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  • 4
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 62 (1987), S. 621-626 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The recent calculation of the specific energy associated with Néel singularities in cubic crystals now permits an estimation of the periodicity and self-magnetostatic energy of multipolar 180° Bloch walls. Additionally, it is shown that the slight zigzagging of these walls in the near-surface region of a crystal causes a considerable reduction of the effective free surface charges by an extensive flux closure internal to the crystal
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 59 (1986), S. 4123-4128 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Subdivided 180° Bloch walls have been observed on iron whiskers using an improved colloid technique. Under the influence of a magnetic field applied vertical to the surface of a specimen the magnetization reversal of the complex wall is governed by Néel line motion. The field-induced conversion exhibits a characteristic "remanence'' and "coercivity'' of the wall. During a longitudinal magnetization cycle of a whisker the actual wall configuration has a substantial influence on the magnetization curve. The coercivity of the specimen is closely correlated to the initial mobility of the Néel lines. Discontinuities in the Néel line motion are responsible for small Barkhausen jumps, especially in the low-field region. The irregular segmentation of the complex wall in the remanent state appears to be an essential source of the remanent whisker magnetization.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 51 (1987), S. 374-375 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An optical technique is presented which permits a simultaneous observation of domains and domain boundaries in transparent and opaque magnetic specimens. The Faraday or Kerr contrast combined with Bitter pattern agglomerations yields a maximum information transference for an investigation of magnetic fine structures. Some results obtained for a uniaxial ferrimagnetic film are discussed.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 61 (1985), S. 29-32 
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The theory of ferrohydrodynamics describes the specific physical properties associated with a magnetizable fluid. From this theory a constitutive equation was derived, which characterizes the stray-field-induced formation of ferrofluid Bitter patterns on the surface of a ferromagnetic specimen.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 331 (1988), S. 217-222 
    ISSN: 1434-601X
    Keywords: 12.35Ht ; 13.75Cs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Proton-antiproton annihilation at rest into two mesons is analysed in a model describing annihilation by quark lines. The model allows to fit existing data with two parameters. The parameters describe the amplitudes for diagrams with and without rearrangement of quark lines.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 44 (1987), S. 223-225 
    ISSN: 1432-0630
    Keywords: 72.15.G
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The dependence of the longitudinal magnetoresistance of 〈100〉 iron whiskers upon the measuring current is investigated at 4.2 K in magnetic fields up to 20 kA/m. The carbon-saturated single crystal whiskers are 30 to 150 μm in diameter with a residual resistance ratio (RRR) of about 300. The shape of the resulting magnetoresistance curves exhibits a strong dependence on the actual measuring current. Previously existing hysteresis effects and resistivity jumps disappear with increasing current in the range from 0 to 1 A.
    Type of Medium: Electronic Resource
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  • 10
    Publication Date: 1989-10-01
    Print ISSN: 0163-1829
    Electronic ISSN: 1095-3795
    Topics: Physics
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