钆铁磁－顺磁相变的正电子寿命研究

Positron Lifetime Study of Ferromagnetism Paramagnetism Phase Transition of Gadolinium

通过测量金属钆在居里点附近的正电子湮没寿命谱随温度变化的关系，发现钆的正电子湮没寿命在居里点近邻Ｔ＜ＴＣ一侧随温度有显著变化。

ositron lifetime spectra of gadolinium metal were measured near its Curie temperature. The lifetime data obtained were analysed as three component lifetime spectra by using Positronfit program. It has been found that the change of bulk lifetime τ 1 is comparatively great when T<T C near 20 ℃ (Curie temperature of Gd), whereas τ 1 is almost independent with temperature at other temperatures.