Results 1 - 9 of 9
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[en] It is described a process which can be used for the optical register of real time information in a negative photoresin. It was used the KMR 747 photoresin by KODAK. (author)
[pt]Descreve-se um processo que pode ser utilizado para o registro optico de informacao em tempo real numa fotoresina negativa. Estudou-se a fotoresina KMR 747 da KODAK. (A.C.A.S.)
[en] The magnetic properties of Co, Ni and NiFe sub-micrometric structures produced by holographic lithography and sputtering techniques are investigated. The structures were obtained using a mask previously recorded by holography in a photo-resist film coated on a quartz substrates. After this procedure, the magnetic material was deposited using the sputtering technique, and the photo resist was removed by lift-off. Samples with thicknesses of around 500 A were grown in stripes structures and periodicity of 800 nm. The results indicate that the samples with Co and NiFe present exchange bias effect and this is due the surface oxidation
[en] The magnetic properties of sub-micrometric magnetic structures of Ni and permalloy (Ni80Fe20) patterned stripes are studied as functions of temperature. The samples are produced by combining an interferometric lithographic technique with sputtering. At room temperature, ferromagnetic resonance and hysteresis data indicate the existence of an in-plane uniaxial anisotropy in both samples. The NiFe sample has an easy axis along the stripes direction in the entire studied temperature range (2 < T < 300 K). On the other hand, an interesting change in the easy magnetization direction is observed in Ni samples, from parallel to perpendicular to the axis of the stripes, when the temperature is decreased. The results are interpreted in terms of a competition between shape and magnetoelastic anisotropies.