Universität zu Köln

Gorkov, Dmitry ORCID: 0000-0002-5983-2771, Toperverg, Boris P. and Zabel, Hartmut (2020). Artificial Magnetic Pattern Arrays Probed by Polarized Neutron Reflectivity. Nanomaterials, 10 (5). BASEL: MDPI. ISSN 2079-4991

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Abstract

Traditionally, neutron scattering is an essential method for the analysis of spin structures and spin excitations in bulk materials. Over the last 30 years, polarized neutron scattering in terms of reflectometry has also contributed largely to the analysis of magnetic thin films and magnetic multilayers. More recently it has been shown that polarized neutron reflectivity is, in addition, a suitable tool for the study of thin films laterally patterned with magnetic stripes or islands. We provide a brief overview of the fundamental properties of polarized neutron reflectivity, considering different domain states, domain fluctuations, and different domain sizes with respect to the neutron coherence volume. The discussion is exemplified by a set of simulated reflectivities assuming either complete polarization and polarization analysis, or a reduced form of polarized neutron reflectivity without polarization analysis. Furthermore, we emphasize the importance of the neutron coherence volume for the interpretation of specular and off-specular intensity maps, in particular when studying laterally non-homogeneous magnetic films. Finally, experimental results, fits, and simulations are shown for specular and off-specular scattering from a magnetic film that has been lithographically patterned into a periodic stripe array. These experiments demonstrate the different and mutually complementary information that can be gained when orienting the stripe array parallel or perpendicular to the scattering plane.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Gorkov, Dmitry UNSPECIFIED orcid.org/0000-0002-5983-2771 UNSPECIFIED Toperverg, Boris P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zabel, Hartmut UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-334843
DOI:	10.3390/nano10050851
Journal or Publication Title:	Nanomaterials
Volume:	10
Number:	5
Date:	2020
Publisher:	MDPI
Place of Publication:	BASEL
ISSN:	2079-4991
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language THIN-FILMS; SCATTERING Multiple languages Nanoscience & Nanotechnology; Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/33484