2 research outputs found
Hard Ferromagnets as a New Perspective on Materials for Thermomagnetic Power Generation Cycles
We consider the ways in which magnetically hard materials can be used as the
working materials in thermomagnetic power generation (TMG) cycles in order to
expand the area in the magnetisation vs. applied field () plane available
for energy conversion. There are 3 parts to this Perspective. First,
experiments on commercially available hard ferrites reveal that, while these
materials are not yet good TMG candidates, hard ferromagnets with higher
thermal conductivity and a greater change of magnetization with temperature
could outperform existing TMG materials. Second, computational results indicate
that biasing a soft magnet with a hard ferromagnet is essentially equivalent to
shifting the loop by an amount proportional to the field of the biasing
magnet. Work outputs under biased conditions show a substantial improvement
over unbiased cycles, but experimental verification is needed. Third, we
discuss the rationale for exploring artificial spin reorientation materials as
novel TMG working materials.Comment: 13 pages, 7 figure