Heat Can Help Make Magnets
EPFL scientists have provided the first evidence ever that it is possible to generate a magnetic field by using heat instead of electricity. The phenomenon is referred to as the Magnetic Seebeck effect, or thermomagnetism.
A temperature difference across an electric conductor can generate an electric field. This phenomenon lies at the root of thermoelectricity (heat turned into electricity), and is used to drive space probes and power thermoelectric generators, and could be implemented for heat-harvesting in power plants, wrist-watches and microelectronics. In theory, it is also possible to generate a magnetic field by using a temperature difference across an electrical insulator. This has been referred to as thermomagnetism, and has enormous applications for future electronics such as solid-state devices and magnetic-tunnel transistors. In a breakthrough Physical Review Letters publication that has been promoted to “Editors’ Suggestion,” EPFL scientists have for the first time predicted and experimentally verified the existence of thermomagnetism.
Read more: http://www.laboratoryequipment.com/news/2013/10/heat-can-help-make-magnets
Gracias a Javier Armentia.
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