Enz, Thorsten ; Winterer, Markus ; Stahl, Branko ; Bhattacharya, Sarbari ; Miehe, Gerhard ; Foster, Keir ; Fasel, Claudia ; Hahn, Horst (2006):
Structure and magnetic properties of iron nanoparticles stabilized in carbon.
In: Journal of Applied Physics, 99 (4), pp. 044306-1. American Institute of Physics, ISSN 00218979,
[Article]
Abstract
Nanoparticles composed of iron and carbon have been produced by chemical vapor synthesis. A detailed structural, electronic, and magnetic characterization has been performed by several methods. The atomic arrangement in the as-prepared particles is strongly affected and stabilized by excess carbon. Small clusters of different ferrous phases are the building blocks of the particles. Due to the in situ formation of a carbonaceous shell the particles are stable against oxidation at ambient conditions. The magnetic properties are influenced by the exceptionally small particle size. The particles exhibit superparamagnetic behavior with a blocking temperature of 30 K and the temperature dependence of the magnetization is governed by the finite size of the system
| Item Type: | Article |
|---|---|
| Erschienen: | 2006 |
| Creators: | Enz, Thorsten ; Winterer, Markus ; Stahl, Branko ; Bhattacharya, Sarbari ; Miehe, Gerhard ; Foster, Keir ; Fasel, Claudia ; Hahn, Horst |
| Title: | Structure and magnetic properties of iron nanoparticles stabilized in carbon |
| Language: | English |
| Abstract: | Nanoparticles composed of iron and carbon have been produced by chemical vapor synthesis. A detailed structural, electronic, and magnetic characterization has been performed by several methods. The atomic arrangement in the as-prepared particles is strongly affected and stabilized by excess carbon. Small clusters of different ferrous phases are the building blocks of the particles. Due to the in situ formation of a carbonaceous shell the particles are stable against oxidation at ambient conditions. The magnetic properties are influenced by the exceptionally small particle size. The particles exhibit superparamagnetic behavior with a blocking temperature of 30 K and the temperature dependence of the magnetization is governed by the finite size of the system |
| Journal or Publication Title: | Journal of Applied Physics |
| Volume of the journal: | 99 |
| Issue Number: | 4 |
| Publisher: | American Institute of Physics |
| Uncontrolled Keywords: | Fine-particle systems, nanocrystalline materials, Fe and its alloys, Metals and alloys, Magnetization curves, hysteresis, Barkhausen and related effects |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids 11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials 11 Department of Materials and Earth Sciences > Material Science > Structure Research 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences |
| Date Deposited: | 20 Apr 2012 07:21 |
| URL / URN: | http://dx.doi.org/10.1063/1.2173185 |
| Identification Number: | doi:10.1063/1.2173185 |
| PPN: | |
| Funders: | The authors gratefully acknowledge the financial support by the German Research Foundation and the DFG Center for Functional Nanostructures for individual research grant. |
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