AI Article Synopsis
- Large-area 1D alpha-Fe2O3 nanostructures were successfully grown on iron substrates using a low-temperature thermal oxidation process without a catalyst.
- Characterization confirmed these structures are single crystalline, and two types—nanobelts and nanoflakes—formed due to variations in growth temperatures.
- The study also noted that the Morin temperature for these nanostructures is significantly lower than in bulk material, with coercive field values changing based on temperature.
Article Abstract
Large-area one dimensional (1D) alpha-Fe2O3 nanostructures were grown on iron substrates by catalyst-free thermal oxidation process at low temperatures in air. The structure characterization revealed that the nanostructures are single crystalline alpha-Fe2O3. Two kinds of alpha-Fe2O3 nanostructures, nanobelts and nanoflakes, were obtained due to the different growth temperature range. A surface diffusion mechanism is proposed to account for the nanobelts and nanoflakes growth. The Morin temperature T(M) of pure 1D alpha-Fe2O3 nanostructures is 121 K, which is far below their bulk counterparts. The coercive field depends on temperature, and takes values 471 Oe at 5 K and about 260 Oe when the temperature is greater than T(M), respectively.
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| http://dx.doi.org/10.1166/jnn.2013.5976 | DOI Listing |
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