Magnetic,structural and magnetocaloric properties of Ni-Si and Ni-Al thermoseeds for self-controlled hyperthermia |
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Authors: | Sudip Pandey Abdiel Quetz Anil Aryal Igor Dubenko Dipanjan Mazumdar Shane Stadler |
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Institution: | 1. Department of Physics, Southern Illinois University, Carbondale, IL, USA;2. Department of Physics &3. Astronomy, Louisiana State University, LA, USA |
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Abstract: | Self-controlled hyperthermia is a non-invasive technique used to kill or destroy cancer cells while preserving normal surrounding tissues. We have explored bulk magnetic Ni-Si and Ni-Al alloys as a potential thermoseeds. The structural, magnetic and magnetocaloric properties of the samples were investigated, including saturation magnetisation, Curie temperature (TC), and magnetic and thermal hysteresis, using room temperature X-ray diffraction and magnetometry. The annealing time, temperature and the effects of homogenising the thermoseeds were studied to determine the functional hyperthermia applications. The bulk Ni-Si and Ni-Al binary alloys have Curie temperatures in the desired range, 316?K–319?K (43?°C–46?°C), which is suitable for magnetic hyperthermia applications. We have found that TC strictly follows a linear trend with doping concentration over a wide range of temperature. The magnetic ordering temperature and the magnetic properties can be controlled through substitution in these binary alloys. |
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Keywords: | Hyperthermia curie temperature magnetocaloric effects |
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