Magnetic Domain Patterns on Single-Crystal Iron Whiskers

1957 ◽  
Vol 107 (5) ◽  
pp. 1276-1280 ◽  
Author(s):  
R. V. Coleman ◽  
G. G. Scott
Keyword(s):  
Single Crystal ◽  
Magnetic Domain ◽  
Iron Whiskers

Magnetic Domain Patterns on Iron Whiskers

1958 ◽  
Vol 29 (3) ◽  
pp. 526-527 ◽  
Author(s):  
R. V. Coleman ◽  
G. G. Scott
Keyword(s):  
Magnetic Domain ◽  
Iron Whiskers

White Synchrotron Radiation Topography of (11̄0) Nickel Single Crystal

1982 ◽  
Vol 37 (5) ◽  
pp. 505-511
Author(s):  
J. D. Stephenson
Keyword(s):  
Magnetic Field ◽  
Synchrotron Radiation ◽  
Single Crystal ◽  
Domain Structure ◽  
Domain Walls ◽  
Magnetic Domain ◽  
Nickel Single Crystal ◽  
Magnetic Domain Walls ◽  
Equivalent Field ◽  
Nickel Crystal

Changes in 70.53° magnetic domain structure on the surface of a perfect (11̄0) nickel crystal have been observed using white synchrotron X-radiation topography. The crystal was influenced by a variable [11̄0] magnetic field. At field strengths ≿ 100 A/m [111̄]-spike domains, thought to be traces of [011], 70.53° (oblique) magnetic domain walls, appeared within [111]-bands (0.4 mm wide) in the topographs. Reversal of the field produced similar spikes at equivalent field values but in different regions of the crystal.

Current-Induced Changes of the Magnetic Domain Structure of Iron Whiskers

1987 ◽  
Vol 103 (2) ◽  
pp. 557-564 ◽  
Author(s):  
R. Berthe ◽  
A. Birkner ◽  
U. Hartmann
Keyword(s):  
Domain Structure ◽  
Magnetic Domain ◽  
Magnetic Domain Structure ◽  
Iron Whiskers ◽  
Induced Changes

On magnetic domain configurations in single-crystal, (112)-orientation plates of iron-silicon alloy: some X-ray topographic observations and their interpretation

1993 ◽  
Vol 442 (1914) ◽  
pp. 161-175 ◽  
Keyword(s):  
Single Crystal ◽  
Reasonable Agreement ◽  
Minimum Energy ◽  
Magnetic Domain ◽  
Easy Magnetization ◽  
Magnetization Direction ◽  
X Ray ◽  
Ferromagnetic Crystal ◽  
Easy Magnetization Direction ◽  
Specimen Interior

Possible magnetization states of a cubic ferromagnetic crystal having easy magnetization directions parallel to the cube axes (as in Fe + 3 mass % Si alloy) can be represented using a regular octahedron, as first shown by Néel. This model is developed to derive rules that govern shapes and relative volumes of the differently magnetized domains needed to produce mean magnetization lying in a plane of any orientation. Single-crystal plates of Fe + 3 mass % Si alloy not containing an easy-magnetization direction, such as plates parallel to (112) studied in this work, are in general subdivided into a hierarchy of domains that in spatial scale diminish from specimen interior towards specimen surfaces. X-ray topography offers a non-contacting method of mapping domain configurations. Under appropriate diffraction conditions the strains associated with 90° Bloch walls generate strong diffraction contrast. In X-ray transmission topographs the superimposition of contrast from surface closure domains upon that of inner domains generally gives rise to highly complex images from (112) plates. However, with specimen thicknesses less than 20 μm the patterns can become sufficiently simplified to make possible the identification of shapes and magnetization axes of all domains present. A pattern in this class is illustrated, and interpreted with the aid of the octahedron. Reasonable agreement is found between the observed size scale of the domains and that calculated for minimum energy in the domain structure proposed.

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