Magnetoresistance of layered structures with alternating in-plane and perpendicular anisotropies

Changes in magnetic and magnetoresistive characteristics of Ni–Fe/Au/Co/Au multilayers induced by annealing

“…Both measurements were performed for samples in as-deposited state and after each stage of successive 1 h annealing in dry N 2 at different temperature T a increasing from 423 up to 523 K in 25 K steps. The M(H) and R(H) dependences are correlated in the whole magnetic field range [4].…”

“…The samples were deposited at room temperature onto Si(100) substrate. The thicknesses of the sublayers were chosen to ensure maximal value and linearity of the magnetoresistance [2][3][4]. The very good periodic structure of MLs was confirmed by low-and high-angle X-ray diffraction.…”

“…Earlier we have demonstrated that for a proper choice of the deposition conditions and thickness of constituent layers, sputter-deposited (Ni 80 Fe 20 /Au/Co/Au) multilayers (MLs) exhibit such a behavior for a magnetic field applied perpendicular to the surface [2][3][4]. Ni 80 Fe 20 (Py = Permalloy) layers possess pronounced in-plane anisotropy, whereas Co layers of certain thickness (t Co < 1.2 nm) sandwiched between Au exhibit the easy axis of magnetization perpendicular to the plane [5].…”

“…Therefore, we consider magnetization reversals of Co and Py layers to be nearly independent. It allows us to determine magnetic properties of Co (separately of Py) layers from M(H) (also R(H)) curves taken with magnetic field applied perpendicular H ⊥ and parallel H || to the layer plane [4]. In this contribution we investigated the influence of low temperature annealing on magnetic and magnetotransport properties of our MLs.…”

MFM Investigations of [NiFe/Au/Co/Au]NMultilayers

“…The samples were prepared by deposition of multilayers on Si(100) wafers by magnetron sputtering in UHV [4]. Py-3.2 nm/Au-2.2 nm/Co-0.8 nm/Au-2.2 nm/ [Py-2.6 nm/Co-0.6 nm/Au-2 nm/Co-0.8 nm/Au-2 nm] 10 (further called A) and Py-3.2 nm/Au-2.2 nm/Co-0.8 nm/ Au-2.2 nm/[Co-0.6 nm/Py-2.6 nm/Au-2 nm/Co-0.8 nm/ Au-2 nm] 10 (further referred as B) were prepared.…”