Magnetization reversal in submicron magnetic wire studied by using giant magnetoresistance effect (SOLID STATE CHEMISTRY-Artificial Lattice Alloys)

The magnetization reversal phenomenon in a submicron magnetic wire with a trilayer structure consisting of NiFe(20nm)/Cu(10nm)/NiFe(5nm) was investigated by measuring the electric resistance in an external magnetic field. A giant magnetoresistance (GMR) effect of about 0.8 % was observed when the magnetizations in two NiFe layers are oriented antiparallel. It is demonstrated that magnetization reversal phenomena can be very sensitively investigated by utilizing the GMR effect

Magnetic Vortex Core Observation in Circular Dots of Permalloy (SOLID STATE CHEMISTRY-Artificial Lattice Allolys)

Spin structures of nanoscale magnetic dots are the subject of increasing scientific effort, as the confinement of spins imposed by the geometrical restrictions makes these structures comparable to some internal characteristic length scales of the magnet. For a vortex (a ferromagnetic dot with a curling magnetic structure), a spot of perpendicular magnetization has been theoretically predicted to exist at the center of the vortex. Experimental evidence for this magnetization spot is provided by magnetic force microscopy imaging of circular dots of permalloy (Ni80Fe20) 0.3 to 1 micrometer in diameter and 50 nanometers thick

Cylindrically symmetric rotating crystals observed in crystallization process of InSiO film

The Kikuchi bands arise from Bragg diffraction of incoherent electrons scattered within a crystalline specimen and can be observed in both the transmission and reflection modes of scanning electron microscopy (SEM). Converging, rocking, or grazing incidence beams must be used to generate divergent electron sources to obtain the Kikuchi pattern. This paper report the observation of Kikuchi pattern from SEM images of an exceptional rotating crystal with continuous rotation in the local crystal direction and satisfying cylindrical symmetry, named a cylindrically symmetric rotating crystal. By retracing the Kikuchi line pattern, it is possible to obtain the lattice structure information of the presented sample from the conventional SEM images. SEM images of cylindrically symmetric rotating crystals reflect the interactions between electrons and the sample in both the real- and momentum-space. It is a very interesting and representative new case for the study of the contrast mechanism in SEM