Journal
NANO LETTERS
Volume 14, Issue 5, Pages 2747-2754Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl500734k
Keywords
metal heterostructures; nanodumbbells; magnetic nanocrystals; epitaxial growth; cobalt; iron
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Funding
- ANR for the project Batmag
- French national project EMMA [ANR12 BS10 013 01]
- European Commission for the FP7 NAMDIATREAM project [EU NMP4-LA-2010-246479]
- European Union [312483-ESTEEM2]
- Programme Investissements d'Avenir under the program [ANR-11-IDEX-0002-02, ANR-10-LABX-0037-NEXT]
- European Research Council (ERC) [24691-COUNTATOMS, 335078-COLOURATOMS]
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We report the solution phase synthesis, the structural analysis, and the magnetic properties of hybrid nanostructures combining two magnetic metals. These nano-objects are characterized by a remarkable shape, combining Fe nanocubes on Co nanorods. The topological composition, the orientation relationship, and the growth steps have been studied by advanced electron microscopy techniques, such as HRTEM, electron tomography, and state-of-the-art 3-dimensional elemental mapping by EDX tomography. The soft iron nanocubes behave as easy nucleation centers that induce the magnetization reversal of the entire nanohybrid, leading to a drastic modification of the overall effective magnetic anisotropy.
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