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用自动真空倒扭摆测量了纯镧在80～700K的内耗和相对切变模量,观测到六个内耗峰。升温过程的H_1峰和降温过程的C_2峰是由镧的FCC-dHCP结构相变引起的,H_2和C_1 峰则可能与这种相变还存在着预转变有关。用内耗方法确定了相变点γ_s、γ_(?)、β_s、β(?)分别为540、650、487和425K。H_3、H_4、H_5、H_6四个内耗峰用2.21Hz的频率测得的峰温分别为366、272、207.2、和119K,其中H_5峰具有弛豫型内耗特征。还测量了纯镧在77～700K范围的磁化率,观测到1/X T线段在FCC-dHCP相变温度出现斜率转折。
The internal friction and relative shear modulus of pure lanthanum at 80 ~ 700K were measured by automatic vacuum inverted torsion pendulum, and six internal friction peaks were observed. The H_ (2) peak of the heating process and the C_2 peak of the cooling process are caused by the phase transition of FCC-dHCP structure of lanthanum. The H_2 and C_1 peaks may be related to the pre-transformation of this phase transition. The phase transition points γ_s, γ _ (?), Β_s, β (?) Were determined to be 540, 650, 487 and 425 K by internal friction method. The peak temperatures of H_3, H_4, H_5 and H_6 were 366, 272, 207.2, and 119 K, respectively, with the frequency of 2.21 Hz. The H_5 peak possessed the relaxation-type internal friction characteristics. The magnetic susceptibility of pure lanthanide in the range of 77K to 700K was also measured. It was observed that the 1 / X T line segment showed a slope transition at the FCC-dHCP transition temperature.