Towards manageable magnetic field retrieval in bulk materials

• Published in: Physica. B, Condensed matter Vol. 356; no. 1; pp. 187 - 191
• Main Authors: Leeb, H., Szeywerth, R., Jericha, E., Badurek, G.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 15.02.2005; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Domain effects, magnetization curves, and hysteresis; Domain walls and domain structure; Exact sciences and technology; Interferometry; Magnetic order; Magnetic properties and materials; Neutron depolarization; Physics; Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.); Tomography; 75.60.Ch; Neutron depolarization; Magnetic order; Tomography; 81.70.Tx; 03.75.Dg; Interferometry; Magnetic field effects; Ferromagnetic materials; Neutron spectroscopy; Computerized tomography; Depolarization; Investigation method; Domain structure; Magnetic domains; 03.75.Dg Neutron depolarization
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2004.10.074

We present an extension to a recently introduced method for the tomographic investigation of magnetic domain structures in ferromagnetic solids which is based on a combination of neutron interferometry and neutron depolarization concepts. Methodical development of the reconstruction algorithm yields significant improvement compared to previous versions. This is expressed by fast convergence and by doubling the maximum computable pixel size from 1.7 μ m before to at least 4 μ m , which is an important step towards actual experimental realization of this novel tomographic method. Furthermore, it is demonstrated that our algorithm converges even when, as in a real experiment, the measured values of the observables are subject to statistical fluctuations.