Abstract
We have observed that annealing conditions strongly affect the temperature dependence of magnetization and Curie temperature of NiMnGa glass-coated microwires. After long (6 h) annealing of the microwires at 773 K, a ferromagnetic ordering is obtained with $T_{c} \approx 300$ K, which is beneficial for a magnetic solid-state refrigeration. The annealed samples also exhibit the exchange bias effect at low temperatures. The decomposition of GaNi phase and the precipitation of Ni2MnGa phase after the annealing can be responsible for the magnetic hardening and the change of the Curie temperature.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
