|internt-fagligt, 2. modul, 2006, id:258|
|Findes på RUb:||ja|
The report is inspired by a former RUC-project that tried to measure the magnetocaloric effect in (formel) with the 3omega-method. It did not succeed. This report shows through an expansions of the method, the experiment and the hypothesis, that there is measurable non-linear signals on both 2nd and 3rd harmonic voltage signal, measured over a coil with a ferromagnetic core. By measuring the harmonic signals in experiments with (formels), with and without a bias on the harmonic voltage signal, a real signal and an imaginary signal is found. The report concludes that everything points at the magnetocaloric effect and hysteresis loss as explanations.