JETP Letters: issues online

$Information on the arrangement of the domain walls inside a ferromagnet is limited, since the picture of the interior is usually assessed from the emergence of the wall to the surface. Direct information on the internal domain structure is obtained with a neutron-optics method based on the study of neutron refraction by the domain walls under conditions of rather high angular resolution [1]. If the neutron beam is parallel to a certain wall system, there is no refraction by the system. This is manifest by a transmission maximum, so that the directions of the domain walls can be established thereby. Each pair of these directions defines one system of parallel walls. To find the indices (hkH) of the plane to which they are parallel, it is necessary to solve a system of two equations of the type hu + kv + Aw = 0, where u, v, and w are the indices of two directions corresponding to transmission maxima.$

Information on the arrangement of the domain walls inside a ferromagnet is limited, since the picture of the interior is usually assessed from the emergence of the wall to the surface. Direct information on the internal domain structure is obtained with a neutron-optics method based on the study of neutron refraction by the domain walls under conditions of rather high angular resolution [1]. If the neutron beam is parallel to a certain wall system, there is no refraction by the system. This is manifest by a transmission maximum, so that the directions of the domain walls can be established thereby. Each pair of these directions defines one system of parallel walls. To find the indices (hkH) of the plane to which they are parallel, it is necessary to solve a system of two equations of the type hu + kv + Aw = 0, where u, v, and w are the indices of two directions corresponding to transmission maxima.