Results are presented of measurements of the temperature dependence of Young's modulus of Fe-Pt alloys (25-29 at% Pt) both in the ordered and disordered states. Very large anomalies in Young's modulus are observed which are a direct consequence of the Invar properties of these alloys. The largest anomaly has been observed for ordered Fe 3 Pt whose Young's modulus at 77 K is very small, 44×10 10 N / m 2 compared to 15.2 ×10 10 N / m 2 without magnetic ordering.
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G. Hausch (1974) studied this question.
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