Zobrazeno 1 - 10
of 158
pro vyhledávání: '"Andreas Michels"'
Autor:
Mathias Bersweiler, Hirokazu Sato, Nozomu Adachi, Yoshikazu Todaka, Inma Peral, Joachim Kohlbrecher, Vladislav D. Zaporozhets, Konstantin L. Metlov, Andreas Michels, Yojiro Oba
Publikováno v:
IUCrJ, Vol 10, Iss 4, Pp 411-419 (2023)
The development of higher-order micromagnetic small-angle neutron scattering theory in nanocrystalline materials is still in its infancy. One key challenge remaining in this field is understanding the role played by the microstructure on the magnitud
Externí odkaz:
https://doaj.org/article/5e41f421ecc449dcb24db71ecd7e2689
Publikováno v:
IUCrJ, Vol 10, Iss 3, Pp 261-269 (2023)
The magnetic small-angle neutron scattering (SANS) cross section of dilute ensembles of uniformly magnetized and randomly oriented Stoner–Wohlfarth particles is calculated using the Landau–Lifshitz equation. The focus of this study is on the angu
Externí odkaz:
https://doaj.org/article/916e95e538b542279608a1e8dc3dbeda
Autor:
Mathias Bersweiler, Michael P. Adams, Inma Peral, Joachim Kohlbrecher, Kiyonori Suzuki, Andreas Michels
Publikováno v:
IUCrJ, Vol 9, Iss 1, Pp 65-72 (2022)
Magnetic small-angle neutron scattering is employed to investigate the magnetic interactions in (Fe0.7Ni0.3)86B14 alloy, a HiB-NANOPERM-type soft magnetic nanocrystalline material, which exhibits an ultrafine microstructure with an average grain size
Externí odkaz:
https://doaj.org/article/9c3ceb746aa24a58a9bd7f0b8bc977c3
Publikováno v:
New Journal of Physics, Vol 25, Iss 8, p 083018 (2023)
Motivated by recent experimental polarized neutron results, we present a numerical micromagnetic study of the interfacial (intergrain) Dzyaloshinskii–Moriya interaction (DMI) in nanocrystalline terbium. We demonstrate that the DMI-induced spin misa
Externí odkaz:
https://doaj.org/article/9a666f61e5d145cc92f3ea04496b6581
Autor:
Andreas Michels, Artem Malyeyev, Ivan Titov, Dirk Honecker, Robert Cubitt, Elizabeth Blackburn, Kiyonori Suzuki
Publikováno v:
IUCrJ, Vol 7, Iss 1, Pp 136-142 (2020)
Small-angle scattering of X-rays and neutrons is a routine method for the determination of nanoparticle sizes. The so-called Guinier law represents the low-q approximation for the small-angle scattering curve from an assembly of particles. The Guinie
Externí odkaz:
https://doaj.org/article/197ab4b5e1e141ceae35e7d6b8ae3d7b
Publikováno v:
Physical Review Research, Vol 4, Iss 4, p 043113 (2022)
Skyrmions are topological magnetic textures that can arise in noncentrosymmetric ferromagnetic materials. In most systems experimentally investigated to date, skyrmions emerge as classical objects. However, the discovery of skyrmions with nanometer l
Externí odkaz:
https://doaj.org/article/da16ba7b706b4219933aa632546399c0
Publikováno v:
Small Science, Vol 1, Iss 1, Pp n/a-n/a (2021)
One of the key challenges in magnetism remains the determination of the nanoscopic magnetization profile within the volume of thick samples, such as permanent ferromagnets. Thanks to the large penetration depth of neutrons, magnetic small‐angle neu
Externí odkaz:
https://doaj.org/article/58dd54146f9c4769ba22586d56c69728
Publikováno v:
Scientific Reports, Vol 8, Iss 1, Pp 1-1 (2018)
A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has not been fixed in the paper.
Externí odkaz:
https://doaj.org/article/f0e2be6aeedf4fde87f9ce95cf17545a
Publikováno v:
New Journal of Physics, Vol 16, Iss 12, p 123031 (2014)
The pole-avoidance principle of magnetostatics results in an angular anisotropy of the magnetic neutron scattering cross section ${\rm d}{{\Sigma }_{M}}/{\rm d}\Omega $ . For the case of a sintered Nd–Fe–B permanent magnet, we report the experime
Externí odkaz:
https://doaj.org/article/1d53a82abe114b048986deaa8e38f0f1
Publikováno v:
Journal of Applied Crystallography. 55:1488-1499
A dilute ensemble of randomly oriented non-interacting spherical nanomagnets is considered, and its magnetization structure and ensuing neutron scattering response are investigated by numerically solving the Landau–Lifshitz equation. Taking into ac