Novel structures and physics of nanomagnets (invited)
- Nebraska Center for Materials and Nanoscience and Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588,USA (United States)
- Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716 (United States)
Nanoscale magnets with characteristic dimensions in the range of 1–100 nm are important in several areas of nanoscience and technology. First, this length scale spans the typical important dimensions of exchange lengths and domain-wall widths, which means that significant control of magnetic properties can be obtained by varying grain or particle dimensions. Second, the nonequilibrium synthetic processes used for clusters, particles, and films, often lead to new real-space crystal structures with completely novel spin structures and magnetic properties. Third, a basic-science challenge in this class of matter involves the spin-polarized quantum mechanics of many-electron systems containing 10–10 000 atoms. Finally, the materials under study may have important future applications in high-density data storage, ultra-small spintronic devices, or high-energy magnetic materials. In this article, we discuss our recent work on novel Fe-Au nanoclusters, MnAu-Mn core-shell structures, and complex high-anisotropy Co-rich intermetallic compound clusters. We also present new results on Fe-based alloys including the magnetic properties of semiconducting FeSi{sub 2} nanoclusters and spin correlations in FeGe nanocluster films.
- OSTI ID:
- 22402969
- Journal Information:
- Journal of Applied Physics, Vol. 117, Issue 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
77 NANOSCIENCE AND NANOTECHNOLOGY
ANISOTROPY
CORRELATIONS
CRYSTAL STRUCTURE
ELECTRONS
FILMS
GERMANIUM
GOLD
INTERMETALLIC COMPOUNDS
IRON
IRON SILICIDES
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MAGNETS
MANGANESE
NANOSTRUCTURES
QUANTUM MECHANICS
SPIN
SPIN ORIENTATION