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The exchange coupling and stability of spin valves with antiferromagnetic (AF) PtMn films were investigated through the correlation between the magnetic properties and their microstructures. The exchange coupling field (H/sub ex/) decreases during iterative MR measurements and this decrease associates closely with the changes in the rotational hysteresis loss (W/sub r/), exchange anisotropy energy (K/sub e/) and blocking temperature (T/sub b/) distribution. The ordering of PtMn films, featuring an antiphase configuration, is found to play a significant role in determining the exchange coupling properties and stability of these spin valves.
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Ueno et al. (2000) studied this question.
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