采用熔体快淬法制备了 MnBi1－x Gdx (x＝0,0．1,0．3和0．5)系列合金试样,分别利用 X 射线衍射(XRD)与振动样品磁强计(VSM)测试了样品的物相结构和磁性能,研究了稀土 Gd元素对MnBi 合金相结构、相转变温度及磁性能的影响,探讨了MnBiGd合金相结构与磁性能的内在关联,结果表明,当 Gd 元素掺入量x＝0．3时,合金的矫顽力达到最大值0．654 T,是未掺杂样品的4．7倍.
MnBi1-xGdx(x=0,0.1,0.3,0.5)alloys were prepared by melt-spinning method.X-ray diffraction (XRD)and vibrating sample magnetometer (VSM)were used to measure and investigate the phase structure and magnetic properties.The effect of Gd doping concentration on the phase structure,phase-transition temper-ature and magnetic properties was investigated.The relationship between the microstructure and magnetic prop-erties of the MnBiGd alloys was discussed.The results show that the optimal content of Gd for the coercivity of MnBi1-xGdx alloys is x=0.3 and the coercivity reaches a maximum value of 0.654 T which is 4.7 times of the undoped samples.
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