42 citations · 177 across the 18 of their papers we have counts for
18 papers
Circular single domains in hemispherical small size Permalloy clusters
Clodoaldo I. L. de Araujo, Jakson M. Fonseca, João P. Sinnecker +3
We have studied ferromagnetic Permalloy clusters obtained by electrodeposition on n-type silicon. Magnetization measurements reveal hysteresis loops almost independent on temperatu…
Surface Plasmons and Field Electron Emission In Metal Nanostructures
Nicolas Garcia, Ming Bai
In this paper we discuss the field enhancement due to surface plasmons resonances of metallic nanostructures, in particular nano spheres on top of a metal, and find maximum field e…
Spin Transfer from a Ferromagnet into a Semiconductor through an Oxide barrier
C. I. L. de Araujo, M. A. Tumelero, A. D. C. Viegas +2
We present results on the magnetoresistance of the system Ni/Al203/n-doped Si/Al2O3/Ni in fabricated nanostructures. The results at temperature of 14K reveal a 75% magnetoresistanc…
Andreev reflection measurements in nanostructures with amorphous WC superconducting contacts
J. Barzola-Quiquia, M. Ziese, P. Esquinazi +1
Point-contact Andreev reflection measurements of Co/ and Cu/tungsten-carbide (WC) contacts are presented. Metallic thin films were patterned by e-beam-lithography and lift-off;…
Quantum Andreev Oscillations in normal-superconducting-normal nanostructures
P. Rödiger, P. Esquinazi, N. García
We show that the voltage drop of specially prepared normal-superconducting-normal nanostructures show quantum Andreev oscillations as a function of magnetic field or input current.…
Size Effects in the Magnetoresistance of Graphite: Absence of Magnetoresistance in Micrometer size Samples
J. C. González, M. Muñoz, N. García +4
We present a study of the magnetoresistance of highly oriented pyrolytic graphite (HOPG) as a function of the sample size. Our results show unequivocally that the magnetoresistance…