Doubt Posted October 12, 2017 Share Posted October 12, 2017 Dear all, May I ask if a material over the Curie Temperature is able to generate a magnetic field? Over the Curie Temperature the material is paramagnetic, magnetically disordered... In another words, if the Earth core is 4400 °C to 6100 °C, and the Curie temperature is important for magnetic properties, may I ask if it is possible that the Earth magnetic field is generated from the Earth core? Thank you for your time. Link to comment Share on other sites More sharing options...
swansont Posted October 12, 2017 Share Posted October 12, 2017 Yes, it can. Just not as a ferromagnet. Current flow also gives rise to magnetic fields, which is how the core is thought to do it. 1 Link to comment Share on other sites More sharing options...
studiot Posted October 12, 2017 Share Posted October 12, 2017 (edited) 17 minutes ago, swansont said: Yes, it can. Just not as a ferromagnet. Current flow also gives rise to magnetic fields, which is how the core is thought to do it. Yup +1. Just like to add to this that the Curie temperature is specific to a pure substance. So mixtures such as the Earth's core will not display one definite CT. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5216106/ This also shows just how far above CT the core temperature is. Edited October 12, 2017 by studiot Link to comment Share on other sites More sharing options...
Doubt Posted October 13, 2017 Author Share Posted October 13, 2017 A current flow of ions... May I say that we have plasma in the Earth Core? not solid, not liquid, but plasma. Like a less bright sun? Link to comment Share on other sites More sharing options...
swansont Posted October 13, 2017 Share Posted October 13, 2017 31 minutes ago, Doubt said: A current flow of ions... May I say that we have plasma in the Earth Core? not solid, not liquid, but plasma. Like a less bright sun? I don't think the core counts as a plasma. Link to comment Share on other sites More sharing options...
studiot Posted October 13, 2017 Share Posted October 13, 2017 1 hour ago, Doubt said: A current flow of ions... May I say that we have plasma in the Earth Core? not solid, not liquid, but plasma. Like a less bright sun? The most recent measurements and hypotheses place the Earths core as being at least as hot as the surface of the Sun. This is consistent with modern hypotheses that require more than radioactive augmentation to account for the cooling rate and present temperature of the Earth. Yet whilst the Sun is plasma, the core is not since it is not gaseous as the pressure is too high. Link to comment Share on other sites More sharing options...
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