Výsledky vyhledávání - "W A Moura-Melo"

Akademický článek

Germanium microparticles as optically induced oscillators in optical tweezers

Autor: W. H. Campos, T. A. Moura, O. J. B. J. Marques, J. M. Fonseca, W. A. Moura-Melo, M. S. Rocha, J. B. S. Mendes

Publikováno v: Physical Review Research, Vol 1, Iss 3, p 033119 (2019)

Oscillatory dynamics is a key tool in optical tweezer applications. It is usually implemented by mechanical interventions that cannot be optically controlled. In this paper, we show that germanium semiconductor beads behave as optically induced oscil

Externí odkaz: https://doaj.org/article/f366ef03901649a788576e68ed55a48e

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Direct observation of magnetic monopole freedom in two-dimensional artificial spin ice

Autor: D G Duarte, L B De Oliveira, F S Nascimento, W A Moura-Melo, A R Pereira, C I L De Araujo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::295f6f7ed24a139821400dc287312e29

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Akademický článek

Dynamics and hysteresis in square lattice artificial spin ice

Autor: G M Wysin, W A Moura-Melo, L A S Mól, A R Pereira

Publikováno v: New Journal of Physics, Vol 15, Iss 4, p 045029 (2013)

Dynamical effects under geometrical frustration are considered in a model for artificial spin ice on a square lattice in two dimensions. Each island of the spin ice has a three-component Heisenberg-like dipole moment subject to shape anisotropies tha

Externí odkaz: https://doaj.org/article/5904471c4848465e92ed9bb8d8d57e96

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Akademický článek

From confinement to deconfinement of magnetic monopoles in artificial rectangular spin ices

Autor: F S Nascimento, L A S Mól, W A Moura-Melo, A R Pereira

Publikováno v: New Journal of Physics, Vol 14, Iss 11, p 115019 (2012)

We study a frustrated two-dimensional array of dipoles forming an artificial rectangular spin ice with horizontal and vertical lattice parameters given by a and b respectively. We show that the ice regime could be stabilized by appropriate choices fo

Externí odkaz: https://doaj.org/article/6aa9aedba0274269a7b9dc5e9f056f45

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