Theorie der Anfangssuszeptibilität und der Magnetisierungskurve von hexagonalen Kobalt-Einkristallen

Kronmüller, H.; Träuble, H.; Seeger, A.; Boser, O.

doi:10.1016/0025-5416(66)90027-9

Cited by 24 publications

(10 citation statements)

References 9 publications

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“…An excellent treatment of the magnetic susceptibility of a Co single crystal has previously been given by Kronmüller et al [4]. However, due to the fact that the particular singlecrystal orientation used in the present experiment simplifies the calculations, and also results in the appearance of several new features which were not discussed in the original paper [4], we present the calculation in some detail.…”

Section: Magnetic Susceptibilitymentioning

confidence: 77%

“…the field direction is perpendicular to the basal plane of our sample. Following Kronmüller et al [4,7] we assume that El,W may be written as…”

Section: General Theory Of the Magnetic Susceptibilitymentioning

confidence: 99%

“…In this equation, L 3 represents the average domain size, F B is the mean area of the domain wall that moves in each individual process, N is the dislocation density, b is the projection of the Burgers vector of dislocations onto the plane of the wall, is an effective dislocationinteraction length [4], C 44 and λ 44 are the components of the elastic and magnetostrictive tensors respectively and δ B is the domain wall width, which, in this temperature interval, is given by [10]…”

Section: Application To Cobaltmentioning

confidence: 99%

“…It should be noted that, due to the particular geometry considered in the present case, this calculation is valid for all values of K 1 and K 2 in this temperature range. In the more general case, for an arbitrary crystal orientation and direction of applied field, the calculation is more complicated and in the paper of Kronmüller et al [4] a solution is only found in the approximation K 2 = 0. Such an approximation is not valid for Co in the temperature range 400 < T (K) < 518.…”

Section: Application To Cobaltmentioning

confidence: 99%

“…The temperature dependences of the magnetic properties of single-crystal cobalt were first investigated in detail, both theoretically and experimentally, by Kronmüller and coworkers almost three decades ago [4]. These workers considered the case of a long single crystal with its axis making an angle of 51 • to the basal plane and with an applied field directed in the basal plane.…”

Section: Introductionmentioning

confidence: 99%

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An analysis of the high-temperature initial susceptibility of single-crystal cobalt

Castro

Blythe

1996

J. Phys.: Condens. Matter

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The ac initial susceptibility of a cobalt single crystal with [0001] orientation has been measured in the temperature range 300 to 820 K. A theoretical treatment of the susceptibility in the range 300 to 700 K has been given in terms of the contributions of domain wall displacements and magnetization vector rotations in the appropriate temperature intervals; this theoretical treatment is found to be in good agreement with the experimentally observed variation. Measurements in the range 700 to 820 K include the martensitic phase transformation at 710 K, which has a pronounced influence on the susceptibility. Magnetic relaxation measurements have also been made over the whole temperature range (300 to 820 K) and are found to be fully consistent with the interpretation of the susceptibility data. An important feature of the relaxation spectrum is a null region (584 to 710 K) which corresponds to that temperature range where contributions to the susceptibility occur due solely to magnetization rotations.

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Section: Magnetic Susceptibilitymentioning

confidence: 77%

“…the field direction is perpendicular to the basal plane of our sample. Following Kronmüller et al [4,7] we assume that El,W may be written as…”

Section: General Theory Of the Magnetic Susceptibilitymentioning

confidence: 99%

Section: Application To Cobaltmentioning

confidence: 99%

Section: Application To Cobaltmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

An analysis of the high-temperature initial susceptibility of single-crystal cobalt

Castro

Blythe

1996

J. Phys.: Condens. Matter

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Investigation of the dislocation arrangement in plastically deformed iron single crystals by means of ferromagnetic techniques

Schroeder

1978

Phys. Stat. Sol. (a)

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The anisotropy of the high‐field susceptibility and the domain structure are investigated in the cases of an undeformed and a plastically deformed (shear strain a = 0.10 and 0.38) iron single crystal. The influence of deformation on the high‐field susceptibility and on the domain pattern is calculated within the framework of micromagnetism for different types and arrangements of dislocations. In State I of the deformation curve the densities of the dislocations of the secondary, conjugated, and coplanar glide system are comparable with that ones of the primary glide system and are calculated to Ns ≈ 2 × 109 and Np ≈ 3 × 109 cm−2. At higher degrees of deformation (Stage III) a comparison between theory and experimental results for the higher field susceptibility shows that the dislocations are present as groups of about 16 dislocations which are arranged in layers parallel to the primary plane.

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Nucleation and pinning of magnetic domains at Co7Sm2 precipitates in Co5Sm crystals

Fidler

Kronmüller

1979

Phys. Stat. Sol. (a)

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By means of the magneto-optical Kerr effect the domain configuration in Co,Sm-crystals is investigated in dependence on the applied magnetic field. The observed change of the domain structure is interpreted in terms of a micromagnetic theory for the magnetization curve of uniaxial single crystals. The displacement of domain walls took place at an initial field of 265 Oe which is interpreted as the intrinsic coercive field due to the Peierls potential and randomly distributed lattice defects. The density of the interaction energy per extension of the wall is determined to be E, ] / g L = 30 erg/cm4 in the case of a rigid wall. The nucleation of reversed domains is observed in the phase boundary between precipitate and matrix. Furthermore precipitates in grain bounda,ries are found to act as sources of nucleation centres. These results are interpreted by the nucleation of reversed domains in regions of low crystal onisotropy or of irregular precipitate-surface. Ilittels des magnetooptischenKerreffekts wird die Domanenstruktur in Co,Sm-Kristallen in Abhangigkeit vom auderen Magnetfeld untersucht. Die beobachtete Anderung der Domlnenstruktur wird durch eine mikromagnetische Theorie fur die Magnetisierungskurve eines einachsigen Einkristalls interpretiert. Die Bewegung der Domanenwande tritt erst ab einer Feldstarke von 265 Oe ein. Dies entspricht einer inneren Koerzitivfeldstarke, die durch das Peierlspotential und statistisch verteilte Gitterfehler hervorgerufen wird. Die Dichte der Wechselwirkungsenergie pro Snsdehnnng der Wand wird fur den Fall einer ebenen Wand als E, ) 2 L = 30 erg/cm4 bestimnit. Die Nukleation der Domanen wird im Phasenubergang zwischen Ausscheidung und Matrix beobachtct. Des weiteren konnen Ausscheidungen in Korngrenzen als niukleationszentren nachgewiesen werden. Diese Ergebnisse werden durch die Nakleation von Domanen in Bereichen niedriger Kristallanisotropie oder ungleichformiger Ausscheidungsoberfllche interpreticrt. l) Co,Sm alloys wcrc produced from 99.995 Yn pure cobalt and 99.9% pure samarium

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Theorie der Anfangssuszeptibilität und der Magnetisierungskurve von hexagonalen Kobalt-Einkristallen

Cited by 24 publications

References 9 publications

An analysis of the high-temperature initial susceptibility of single-crystal cobalt

An analysis of the high-temperature initial susceptibility of single-crystal cobalt

Investigation of the dislocation arrangement in plastically deformed iron single crystals by means of ferromagnetic techniques

Nucleation and pinning of magnetic domains at Co7Sm2 precipitates in Co5Sm crystals

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