Magnetic Property of Undercooled Co Alloy Melt

为了研究铁和铂元素合金熔体是否具有铁磁性，在强静态磁场下采用电磁悬浮法对熔体进行解冷。新开发的装置使基于非接触式高精度光学技术的深度过冷熔体磁化测量成为可能。结果表明，Co_<80>Pd_<20>的过冷熔体在居里点附近磁化强度急剧上升。然而，由于熔体在较深的过冷条件下会快速凝固，因此没有测量熔体的铁磁转变。

In order to investigate whether alloy melts of iron and platinum elements show ferromagnetic or not, the melts were undecooled by a electromagnetic levitation method under a strong static magnetic field. The newly-developed setup makes it possible to measure magnetization of the deeply undercooled melts based on a non-contact high-precision optical technique. In the result, undercooled Co_<80>Pd_<20> melt near its Curie point showed a sharp rise of magnetization. However, a ferromagnetic transition of the melt was not measured because of rapid solidification of the melt at a deeper undercooling condition.