Magnetic, transport and structural properties of Co/Ir multilayers grown by molecular beam epitaxy

Abstract

(001), with a tetragonalization of the Co fcc structure, due to strains induced by the Ir buffer. TEM images also show that the Co/Ir interfaces are flat, while the layers are continuous and free of bridges. These observations are consistent with zero field nuclear magnetic resonance measurements which indicate an fcc structure of the Co layers, and an interface mixing between Co and Ir limited to one atomic layer. As a consequence the antiferromagnetically coupled Co/Ir/Co sandwich presents large saturation and coercive fields which exceed 20 kOe and 220 Oe, respectively. Annealing made on the same sandwich indicate that the magnetic and transport properties are stable up to 300 °C.

Effect of the nanometric scale thickness on the magnetization steps in Ca3Co2O6thin films

“…This may suggest that grains start to superpose along the growth direction. Note also in both cases the presence of moiré fringes due to misaligned atomic planes [27] from the cobaltite and Al 2 O 3 substrate. For example, the fringes observed in figure 4(a), with a period of 2.41 nm, originate from the interference of the Al 2 O 3 (110) (0.238 nm) and Ca 3 Co 2 O 6 (300) (0.264 nm) atomic planes.…”

Nuclear magnetic resonance in ferromagnets: Ferromagnetic nuclear resonance; a very broadband approach

“…The enhancement factor η is much lower (10-100) in case of domain rotation for which dθ/dH1 = 1/Ha (11) and η = (dφ / dθ) (HF/Ha) (12) where Ha is the anisotropy field.…”