Title :
Relationship Between Thermal Stability and Layer-Stack/Structure of NiMn-Based GMR Systems
Author :
Wienecke, A. ; Rissing, L.
Author_Institution :
Inst. for Microproduction Technol., Leibniz Univ. Hannover, Garbsen, Germany
Abstract :
This paper deals with the dependence of NiMn-based spin valves´ functionality on temperature and time and with the factors influencing their thermal stability. As will be shown, the NiMn-based systems can be used for more than 660 h at 250 °C without degradation, but also an application up to 400 °C for short time is possible. The investigations reveal the dependence of the system´s thermal stability on the layer-stack and its structure. The exchange bias turns out to be an indicator for a spin valve´s thermal stability.
Keywords :
exchange interactions (electron); giant magnetoresistance; manganese alloys; nickel alloys; spin valves; thermal stability; NiMn; NiMn-based GMR systems; NiMn-based spin valve functionality; exchange bias; layer-stack; spin valve thermal stability; temperature 250 degC; Annealing; Degradation; Diffusion processes; Resistance; Spin valves; Stability analysis; Thermal stability; Exchange bias; NiMn; giant magnetoresistance; thermal stability;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2014.2355874
