Hakaru Masumoto1, Showhachi Sawaya1 and Michio Kikuchi1
1The Research Institute of Electric and Magnetic Alloys, 107, Higashi 8-bancho, Sendai
Young's modulus, thermal expansion, magnetic susceptibility and electric resistivity at -150∼400°C, and hardness at room temperature have been measured for annealed Mn-Ge alloys. It has been found that Mn-5.0∼28.9% Ge alloys slow-cooled after heating at temperatures 100°C lower than the solidus have distinct anomalies corresponding to antiferromagnetic N´eel points on the Young's modulus vs temperature curves. The curve of temperature coefficient of Young's modulus at room temperature vs composition exhibits a minor positive maximum at the concentration of 20.0% Ge, thus showing the Elinvar property in this alloy system.
(Received 1974/04/2)
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