The R-Fe nanoparticle was successfully synthesized by a solventless thermal decomposition method. The metal 2+ -oleate 2 complex prepared with metal salts and surfactant in aqueous solution was transformed to metal oxide. The metal oxide nanoparticle synthesized from the metal 2+ -oleate 2 complex was mixed with salt powder as a separating media. The metal oxide mixture was reduced to R-Fe nanoparticles by Ar + 4% H 2 mixture gas, and then it was annealed under a high-vacuum system of 1.8 × 10 -5 Torr at 700 °C. The NaCl powder that was used instead of a surfactant plays an important role to keep the size and shape of the nanoparticles. The magnetization value of the prepared R-Fe nanoparticles is 213 emu/g, and the mean particle size of the R-Fe nanoparticles is 35 nm.

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The effects of perpendicular anisotropy on the interlayer coupling in perpendicularly magnetized [Pd∕Co]∕Cu∕[Co∕Pd] spin valves have been explored. It was clearly confirmed that the perpendicular anisotropy of soft and hard [Co∕Pd] multilayers plays a crucial role in determining the physical characteristics of perpendicular interlayer coupling in the [Pd∕Co]∕Cu∕[Co∕Pd] spin valves. In addition, theoretical calculations demonstrated that the behavior of experimentally observed perpendicular interlayer coupling dominantly followed a Ruderman–Kittel–Kasuya–Yoshida oscillation modified by including a physical parameter directly relevant to the angle deviation of soft or hard [Co∕Pd] magnetizations from the perpendicular direction in the spin valves rather than a topologically induced interlayer coupling.

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