Cold melting of invar alloys

Article

关键词: FE-PT ALLOYS;    MAGNETIZATION;    FE72PT28;   

DOI  :  10.1103/PhysRevB.63.132102

来源: SCIE

【 摘 要 】

An anomalously strong volume magnetostriction in Invars may lead to a situation whereby at low temperatures the dislocation free energy becomes negative and a multiple generation of dislocations becomes possible. This generation induces a first-order phase transition from the fee crystalline state to an amorphous state, and may be called ''cold melting. The possibility of the cold melting in Invars is connected with the fact that the exchange energy contribution into the dislocation self-energy in Invars is strongly enhanced, as compared to conventional ferromagnets, due to anomalously strong volume magnetostriction. A possible candidate in which this effect can be observed is a FePt disordered Invar alloy in which the volume magnetostriction is especially large.

【 授权许可】

Free