气候变化领域集成服务门户(CCPortal): Reciprocal space tomography of 3D skyrmion lattice order in a chiral magnet

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DOI	10.1073/pnas.1803367115
	Reciprocal space tomography of 3D skyrmion lattice order in a chiral magnet
	Zhang S.; Van Der Laan G.; Müller J.; Heinen L.; Garst M.; Bauer A.; Berger H.; Pfleiderer C.; Hesjedal T.
发表日期	2018
ISSN	0027-8424
起始页码	6386
结束页码	6391
卷号	115 期号:25
英文摘要	It is commonly assumed that surfaces modify the properties of stable materials within the top few atomic layers of a bulk specimen only. Exploiting the polarization dependence of resonant elastic X-ray scattering to go beyond conventional diffraction and imaging techniques, we have determined the depth dependence of the full 3D spin structure of skyrmions-that is, topologically nontrivial whirls of the magnetization-below the surface of a bulk sample of Cu2OSeO3. We found that the skyrmions change exponentially from pure Néel- to pure Bloch-twisting over a distance of several hundred nanometers between the surface and the bulk, respectively. Though qualitatively consistent with theory, the strength of the Néel-twisting at the surface and the length scale of the variation observed experimentally exceed material-specific modeling substantially. In view of the exceptionally complete quantitative theoretical account of the magnetic rigidities and associated static and dynamic properties of skyrmions in Cu2OSeO3 and related materials, we conclude that subtle changes of the materials properties must exist at distances up to several hundred atomic layers into the bulk, which originate in the presence of the surface. This has far-reaching implications for the creation of skyrmions in surface-dominated systems and identifies, more generally, surface-induced gradual variations deep within a bulk material and their impact on tailored functionalities as an unchartered scientific territory. © 2018 National Academy of Sciences. All Rights Reserved.
英文关键词	3D magnetic imaging; Magnetic surface effects; Resonant elastic X-ray scattering; Skyrmions; Spintronics
语种	英语
scopus关键词	Article; bulk density; chirality; crystal structure; priority journal; quantitative analysis; radiation scattering; skyrmion lattice; surface property; three dimensional imaging; tomography
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160503
作者单位	Zhang, S., Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, OX1 3PU, United Kingdom; Van Der Laan, G., Magnetic Spectroscopy Group, Diamond Light Source, Didcot, OX11 0DE, United Kingdom; Müller, J., Institut für Theoretische Physik, Universität zu Köln, Köln, 50937, Germany; Heinen, L., Institut für Theoretische Physik, Universität zu Köln, Köln, 50937, Germany; Garst, M., Institut für Theoretische Physik, TU Dresden, Dresden, 01062, Germany; Bauer, A., Physik Department, Technische Universität München, Garching, 85748, Germany; Berger, H., Crystal Growth Facility, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, CH-1015, Switzerland; Pfleiderer, C., Physik Department, Technische Universität München, Garching, 85748, Germany; Hesjedal, T., Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, OX1 3PU, United Kingdom
推荐引用方式 GB/T 7714	Zhang S.,Van Der Laan G.,Müller J.,et al. Reciprocal space tomography of 3D skyrmion lattice order in a chiral magnet[J],2018,115(25).
APA	Zhang S..,Van Der Laan G..,Müller J..,Heinen L..,Garst M..,...&Hesjedal T..(2018).Reciprocal space tomography of 3D skyrmion lattice order in a chiral magnet.Proceedings of the National Academy of Sciences of the United States of America,115(25).
MLA	Zhang S.,et al."Reciprocal space tomography of 3D skyrmion lattice order in a chiral magnet".Proceedings of the National Academy of Sciences of the United States of America 115.25(2018).