期刊
NATURE NANOTECHNOLOGY
卷 11, 期 6, 页码 545-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NNANO.2016.25
关键词
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资金
- Office of Basic Energy Sciences of the US Department of Energy [DE-FG02-06ER46293]
- National Science Foundation (NSF) [CMMI 1436375, PHYS 0848797]
- Cariplo project UMANA [2013-0735]
- Cariplo project MAGISTER [2013-0726]
- Ministero Italiano dell'Universita e della Ricerca (MIUR) [2010ECA8P3]
- Basque Government [PI_2015_1_19]
- Spanish Ministry of Economy Competitiveness [BES-2013-063690]
- Direct For Mathematical & Physical Scien
- Division Of Physics [1205878] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1618941] Funding Source: National Science Foundation
- U.S. Department of Energy (DOE) [DE-FG02-06ER46293] Funding Source: U.S. Department of Energy (DOE)
The search for novel tools to control magnetism at the nanoscale is crucial for the development of new paradigms in optics, electronics and spintronics. So far, the fabrication of magnetic nanostructures has been achieved mainly through irreversible structural or chemical modifications. Here, we propose a new concept for creating reconfigurable magnetic nanopatterns by crafting, at the nanoscale, the magnetic anisotropy landscape of a ferromagnetic layer exchange-coupled to an antiferromagnetic layer. By performing localized field cooling with the hot tip of a scanning probe microscope, magnetic structures, with arbitrarily oriented magnetization and tunable unidirectional anisotropy, are reversibly patterned without modifying the film chemistry and topography. This opens unforeseen possibilities for the development of novel metamaterials with finely tuned magnetic properties, such as reconfigurable magneto-plasmonic and magnonic crystals. In this context, we experimentally demonstrate spatially controlled spin wave excitation and propagation in magnetic structures patterned with the proposed method.
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