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Structural Magnetic and Thermal Stability of IrMn Exchange Biased Layers



Chang H. Lee, J G. Jung, Robert D. McMichael, R A. Fry, Andrew P. Chen, William F. Egelhoff Jr., V S. Gornakov


The magnetic domain structure, magnetic properties and thermal stability of IrMn biased top spin valves containing Co and NiFe have been investigated. The magneto-optical indicator film (MOIF) pictures of NiFe biased IrMn spin valve showed the formation and motion of domain walls which divide two big macrodomains only, unlike the Co biased IrMn spin valve structure of many small microdomains. From the angular dependence of the ferromagnetic resonance linewidth (?H) and resonance field (Hres) it was found that the IrMn biased Co film is very different from the behavior of a NiO biased permalloy film which exhibits two magnon scattering. To investigate the thermal stability two kinds of magnetoresistance measurements at anneal temperature (TAnn) and room temperature (TR.T) following anneals were accomplished.
Journal of Applied Physics
No. 10


magnetic domain structure, magnetic stability, magneto-optical indicator film (MOIF), structural stability, thermal stability


Lee, C. , Jung, J. , McMichael, R. , Fry, R. , Chen, A. , Egelhoff, W. and Gornakov, V. (2002), Structural Magnetic and Thermal Stability of IrMn Exchange Biased Layers, Journal of Applied Physics (Accessed April 12, 2024)
Created May 1, 2002, Updated February 17, 2017