Magnetocaloric effect at cryogenic temperature in gadolinium oxide nanotubes
| Autor: | Biswarup Satpati, Tapas Paramanik, Pintu Sen, I. Das, Rima Paul, Kalipada Das |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Nanomaterials Nanoclusters Condensed Matter::Materials Science Magnetization Nuclear magnetic resonance 0103 physical sciences Magnetic refrigeration Perpendicular 0210 nano-technology Anisotropy Deposition (law) Superparamagnetism |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 417:182-188 |
| ISSN: | 0304-8853 |
| Popis: | We have synthesized fascinating nano-structure of Gadolinium oxide (Gd 2 O 3 ) using controlled template-assisted electrochemical deposition technique which showed interesting anisotropic magnetic behavior. The nanotubes of Gd 2 O 3 with average diameter 200 nm, length 10 µm and wall thickness 20 nm are constituted of nanoclusters with average diameter 7.5 nm. The tubes are aligned and are almost uniform throughout their length. Detailed magnetic measurements of aligned Gd 2 O 3 nanotubes have been performed for both parallel and perpendicular magnetic field orientations with respect to the axis of the Gd 2 O 3 nanotube array. Significant differences in magnetization values have been observed between the parallel and perpendicular orientations. Experimental results indicate the superparamagnetic nature of the nanomaterial. Large magnetocaloric effect, associated with the sharp change in magnetization of the Gd 2 O 3 nanotubes, has been observed in the cryogenic temperature regime that shows anisotropic behavior. |
| Databáze: | OpenAIRE |
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