Anomalous shift of Curie temperature in iron-nickel invar alloys by high-energy heavy ion irradiation

Iwase, Akihiro; Hamatani, Yutaro*; Mukumoto, Yoshinori*; Ishikawa, Norito; Chimi, Yasuhiro; Kambara, Tadashi*; Mller, C.*; Neumann, R.*; Ono, Fumihisa*

Nuclear Instruments and Methods in Physics Research B, 209(1-4), p.323 - 328, 2003/08

https://doi.org/10.1016/S0168-583X(02)02055-4

Fe=Ni Invar alloy is irradiated with GeV Xe and U ions at room temperature. By the irradiation, the Curie temperature of the soecimens increases, which is correlated with the electronic stopping power. This phenomenon can be explained as due to the lattice expansion and/or the local increase in Ni concentration.