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pro vyhledávání: '"Pasquini, G"'
The geometry and morphology of magnetic domain walls (DWs) are closely related to their dynamics when driven by external forces. Under some reliable approximations DWs can be considered self-affine interfaces, so universal laws govern their behavior.
Externí odkaz:
http://arxiv.org/abs/2312.16802
Autor:
Domenichini, P., Paris, F. N., Capeluto, M. G., Granada, M., George, J. -M., Pasquini, G., Kolton, A. B.
Publikováno v:
Phys. Rev. B 103, 220409 (2021)
The dynamics of micrometer-sized magnetic domains in ultra-thin ferromagnetic films is so dramatically slowed down by quenched disorder that the spontaneous elastic tension collapse becomes unobservable at ambient temperature. By magneto-optical imag
Externí odkaz:
http://arxiv.org/abs/2012.09377
Autor:
Schmidt, J., Bekeris, V., Lozano, G. S., Bortulé, M. V., Bermúdez, M. Marziali, Hicks, C. W., Canfield, P. C., Fradkin, E., Pasquini, G.
Publikováno v:
Phys. Rev. B 99, 064515 (2019)
Evidence of nematic effects in the mixed superconducting phase of slightly underdoped $\text{Ba}(\text{Fe}_{1-x}\text{Co}_x)_2\text{As}_2$ is reported. We have found strong in-plane resistivity anisotropy for crystals in different strain conditions.
Externí odkaz:
http://arxiv.org/abs/1901.02504
Autor:
Bermúdez, M. Marziali, Louden, E. R., Eskildsen, M. R., Dewhurst, C. D., Bekeris, V., Pasquini, G.
We studied thermal and dynamic history effects in the vortex lattice (VL) near the order-disorder transition in clean NbSe$_2$ single crystals. Comparing the evolution of the effective vortex pinning and the bulk VL structure, we observed metastable
Externí odkaz:
http://arxiv.org/abs/1701.08798
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Publikováno v:
Phys. Rev. Lett. 115, 067001 (2015)
We report structural evidence of dynamic reorganization in vortex matter in clean NbSe$_2$ by joint small angle neutron scattering and ac-susceptibility measurements. The application of oscillatory forces in a transitional region near the order-disor
Externí odkaz:
http://arxiv.org/abs/1505.03605
Publikováno v:
Phys. Rev. B 84, 012508 (2011)
We study experimentally and theoretically, the reorganization of superconducting vortices driven by oscillatory forces near the plastic depinning transition. We show that the system can be taken to configurations that are tagged by the shaking parame
Externí odkaz:
http://arxiv.org/abs/1106.5401
Publikováno v:
Phys. Rev. B 81, 184520 (2010)
We study the different dynamical regimes of a vortex lattice driven by AC forces in the presence of random pinning via numerical simulations. The behaviour of the different observables is charaterized as a function of the applied force amplitude for
Externí odkaz:
http://arxiv.org/abs/1004.0894
The glassy dynamics is a consequence of the elastic properties of the vortex matter, and in principle may occur in any superconductor. However, whereas a large amount of experimental evidence confirms glassiness in high Tc superconductors (HTS), the
Externí odkaz:
http://arxiv.org/abs/0909.2186
It is commonly accepted that the peak effect (PE) in the critical current density of type II superconductors is a consequence of an order-disorder transition in the vortex lattice (VL). Examination of vortex lattice configurations (VLCs) in its vicin
Externí odkaz:
http://arxiv.org/abs/0803.0307