About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Magnetic Materials for Sensors, Power, and Multifunctional Applications
|
| Presentation Title |
Spontaneous Exchange Bias in a Metamagnetic Heusler Alloy Thin Film |
| Author(s) |
Vasileios Alexandrakis, Ivan Rodriguez Aseguinolaza, Dimitrios Anastasakos, Jose Manuel Barandiaran, Volodymyr Chernenko, Jose Maria Porro |
| On-Site Speaker (Planned) |
Jose Maria Porro |
| Abstract Scope |
Metamagnetic Heusler alloys are actively being investigated because of their great potential as magnetocaloric materials. Their properties are intimately related to the nanoscale homogeneity of their magnetic properties. Here, a spontaneous exchange bias phenomenon on a Ni-Co-Mn-Sn metamagnetic Heusler sputtered film is presented and studied in detail. DC magnetization curves measured as a function of the temperature demonstrate that the system exhibits canonical spin-glass-like features. After a careful study of the field-cooling and zero field-cooling curves measured on this system the existence of magnetic inhomogeneities is inferred, due to the competition between ferromagnetic and antiferromagnetic exchange interactions between Mn atoms. AC susceptibility measurements demonstrate that the underlying exchange bias phenomenon can be attributed to a magnetic clusters model based on superferromagnetic-like interactions present in the film. These findings suggest that the spontaneous exchange bias exhibited by the studied system is a consequence of the formation of this superferromagnetic-like state. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, Thin Films and Interfaces, Energy Conversion and Storage |