Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
191 0 |
SM ISO690:2012 SCHUMANN, Joachim, LISUNOV, Konstantin, ESCOFFIER, Walter, RAQUET, Bertrand, BROTO, Jean-Mark, ARUSHANOV, Ernest, MONCH, Ingolf J., MAKAROV, Denys, DENEKE, Christoph F., SCHMIDT, Oliver. Magnetoresistance of rolled-up Fe 3Si nanomembranes. In: Nanotechnology, 2012, vol. 23, p. 0. ISSN 0957-4484. DOI: https://doi.org/10.1088/0957-4484/23/25/255701 |
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Nanotechnology | |
Volumul 23 / 2012 / ISSN 0957-4484 | |
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DOI:https://doi.org/10.1088/0957-4484/23/25/255701 | |
Pag. 0-0 | |
Rezumat | |
Magnetotransport of individual rolled-up Fe 3Si nanomembranes is investigated in a broad temperature range from 4.2 K up to 300 K in pulsed magnetic fields up to 55T. The observed magnetoresistance (MR) has the following pronounced features: (i) MR is negative in the investigated intervals of temperature and magnetic field; (ii) its magnitude increases linearly with the magnetic field in a low-field region and reveals a gradual trend to saturation when the magnetic field increases; (iii) the MR effect becomes more pronounced with increasing temperature. These dependences of MR on the magnetic field and temperature are in line with predictions of the spin-disorder model of the spin-flip sd interaction assisted with creation or annihilation of magnons, which is expected above a certain critical temperature. Comparison of the MR features in rolled-up and planar samples reveals a substantial increase of the critical temperature in the rolled-up tube, which is attributed to a new geometry and internal strain arising in the rolled-up nanomembranes, influencing the electronic and magnetic properties of the material. |
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Cuvinte-cheie Electric resistance, magnetic properties, Magnetoelectronics, Magnetoresistance, nanostructures, Silicon, temperature |
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