MnGe magnetic nanocolumns and nanowells
- 28 May 2010
- journal article
- Published by IOP Publishing in Nanotechnology
- Vol. 21 (25), 255602
- https://doi.org/10.1088/0957-4484/21/25/255602
Abstract
We report a 'superlattice' growth method to produce well-aligned magnetic MnGe nanocolumns and nanowells by using low-temperature molecular-beam epitaxy. Both structural and magnetic properties show strong evidence of Mn(5)Ge(3) precipitates and lattice-coherent nanostructures with different blocking temperatures. Magnetotransport measurements reveal positive and negative magnetoresistances for the nanowells and nanocolumns, respectively. This distinction can be explained by different spin scattering mechanisms under magnetic fields. Our results suggest a new growth strategy to achieve reproducible MnGe nanostructures, which facilitates the development of Ge-based spintronics and magnetoelectronics devices.Keywords
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