Magnetic susceptibility of a series of hypoeutectic Al-Yb alloys has been investigated in a wide temperature range from 300 to 1650 K. A step-like drastic change in the magnetic susceptibility at melting point has been discovered for the first time. The anomaly is interpreted as a temperature-induced valence transition. The substitution aluminum by gallium shifts the valence transition to room temperature. The valence states of ytterbium in both systems are discussed for solid and liquid phases.

中文翻译：

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稀Al-Yb合金中of的价态

已在300至1650 K的宽温度范围内研究了一系列次共晶Al-Yb合金的磁化率。首次发现了熔点下磁化率的阶梯状急剧变化。异常被解释为温度引起的价态转变。用镓取代铝会使价态转变到室温。讨论了固相和液相两种体系中的价态。