Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Buczek, Pawel"'
In this report we present a systematic study of the magnonic modes in the disordered Fe$_{0.5}$Co$_{0.5}$ alloy based on the Heisenberg Hamiltonian using two complementary approaches. In order to account for substitutional disorder, on the one hand w
Externí odkaz:
http://arxiv.org/abs/2103.05967
Publikováno v:
Phys. Rev. B 104, 024403 (2021)
We study theoretically the influence of the temperature and disorder on the spin wave spectrum of the magnonic crystal Fe$_{1-c}$Co$_{c}$. Our formalism is based on the analysis of a Heisenberg Hamiltonian by means of the wave vector and frequency de
Externí odkaz:
http://arxiv.org/abs/2009.04712
Publikováno v:
Phys. Rev. B 101, 214420 (2020)
The fluctuations of the magnetic order parameter, or longitudinal spin excitations, are investigated theoretically in the ferromagnetic Fe and Ni as well as in the antiferromagnetic phase of the pnictide superconductor FeSe. The charge and spin dynam
Externí odkaz:
http://arxiv.org/abs/2003.09735
Akademický článek
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Autor:
Sandratskii, Leonid M., Buczek, Paweł
The study of the spin excitations in antiferromagnetic (AFM) and ferromagnetic (FM) phases of FeRh is reported. We demonstrate that although the Fe atomic moments are well defined there is a number of important phenomena absent in the Heisenberg desc
Externí odkaz:
http://arxiv.org/abs/1110.3913
We study the Landau damping of ferromagnetic magnons in Fe, Co, and Ni as the dimensionality of the system is reduced from three to two. We resort to the \textit{ab initio} linear response time dependent density functional theory in the adiabatic loc
Externí odkaz:
http://arxiv.org/abs/1109.6217
Autor:
Buczek, Pawel, Wolny, Janusz
We study decorated one-dimensional quasicrystal obtained by a non-standard projection of a part of two-dimensional lattice. We focus on the impact of varying relative positions of decorated sites. First, we give general expression for the structure f
Externí odkaz:
http://arxiv.org/abs/cond-mat/0511345
Autor:
Buczek, Pawel, Wolny, Janusz
In this paper the systematic method of dealing with the arbitrary decorations of quasicrystals is presented. The method is founded on the average unit cell formalism and operates in the physical space only, where each decorating atom manifests itself
Externí odkaz:
http://arxiv.org/abs/cond-mat/0505220
Publikováno v:
Acta Physica Polonica B, vol. 36(3), 2005
A simple model of 1D structure based on a Fibonacci sequence with variable atomic spacings is proposed. The model allows for observation of the continuous transition between periodic and non-periodic diffraction patterns. The diffraction patterns are
Externí odkaz:
http://arxiv.org/abs/cond-mat/0309008
Akademický článek
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