The introduction of minimal Ni into MnCoSi efficiently changes the magnetic interaction and establish a thermal-induced magnetic transition from a spiral magnetic state to a ferromagnetic-like state in Mn1-xNixCoSi alloys. With increasing the temperature, both the cycloidal and helical magnetic spin rotates continuously and coherently towards to b axis during the transition. Therefore, a wide-temperature range zero thermal expansion behaviour is realized owing to the robust magnetoelastic coupling.
- Jun Liu
- Bei Ding
- Wenhong Wang
