Zobrazeno 1 - 10
of 475
pro vyhledávání: '"Melo, W."'
Publikováno v:
J. Appl. Phys. 135, 183902 (2024)
The Skyrmion Hall Effect (SkHE) observed in ferromagnetic (FM) and ferrimagnetic (FI) skyrmions traveling due to a spin-polarized current can be a problematic issue when it comes to technological applications. By investigating the properties of FI sk
Externí odkaz:
http://arxiv.org/abs/2405.08955
Autor:
Nascimento, F. S., de Oliveira, L. B., Duarte, D. G., de Araujo, C. I. L., Moura-Melo, W. A., Pereira, A. R.
Magnetic structure factor (MSF) is employed to investigate the ground state degeneracy in rectangular-like artificial spin ices. Our analysis considers the importance of nanoislands size via dumbbell model approximation. Pinch points in MSF and resid
Externí odkaz:
http://arxiv.org/abs/2310.09662
Autor:
Duarte, D. G., de Oliveira, L. B., Nascimento, F. S., Moura-Melo, W. A., Pereira, A. R., de Araujo, C. I. L.
Magnetic monopole unpairing as a function of external magnetic fields is presented as a fingerprint of this emergent quasiparticles freedom in a two-dimensional artificial spin ice system. Such freedom, required for example for further application in
Externí odkaz:
http://arxiv.org/abs/2207.06204
Autor:
Nascimento, F. S., de Oliveira, L. B., Duarte, D. G., de Araujo, C. I. L., Moura-Melo, W. A., Pereira, A. R.
Publikováno v:
Journal of Applied Physics; 6/28/2024, Vol. 135 Issue 24, p1-7, 7p
We investigate the dynamics of two skyrmions lying in distinct layers of an antiferromagnetic bilayer system, consisting of nanostripes with the shape of racetracks. The top and bottom nanostripes are separated by a height offset and they are coupled
Externí odkaz:
http://arxiv.org/abs/2109.04232
We investigate skyrmion configuration and dynamics in antiferromagnetic thin disks. It is shown that the skyrmion acquires oscillatory dynamics with well-defined amplitude and frequency which may be controlled on demand by the spin-polarized current.
Externí odkaz:
http://arxiv.org/abs/2008.01061
Autor:
Gonçalves, R. S., Gomes, A. C. C., Loreto, R. P., de Araujo, C. I. L., Nascimento, F. S., Moura-Melo, W. A., Pereira, A. R.
We study planar rectangular-like arrays composed by macroscopic dipoles (magnetic bars with size around a few centimeters) separated by lattice spacing a and b along each direction. Physical behavior of such macroscopic artificial spin ice (MASI) sys
Externí odkaz:
http://arxiv.org/abs/1909.05296
Autor:
Campos, W. H., Moura, T. A., Marques, O. J. B. J., Fonseca, J. M., Moura-Melo, W. A., Rocha, M. S., Mendes, J. B. S.
Publikováno v:
Phys. Rev. Research 1, 033119 (2019)
Oscillatory dynamics is a key tool in optical tweezers applications. It is usually implemented by mechanical interventions that cannot be optically controlled. In this work we show that Germanium semiconductor beads behave as optically induced oscill
Externí odkaz:
http://arxiv.org/abs/1903.12252
We investigate vortex configuration in antiferromagnetic thin discs. It is shown that the vortex acquires oscillatory dynamics with well-defined amplitude and frequency which may be controlled on demand by an alternating spin polarized current. These
Externí odkaz:
http://arxiv.org/abs/1812.07537
Publikováno v:
Appl. Opt. 57, 7216-7224 (2018)
Reflection and refraction of light can be used to trap small dielectric particles in the geometrical optics regime. Absorption of light is usually neglected in theoretical calculations, but it is known that it occurs in the optical trapping of metall
Externí odkaz:
http://arxiv.org/abs/1802.00534