We present a systematic study of the magnetic moments and magnetocrystalline anisotropy of finite monoatomic Fen (1<~n<~9) chains deposited along the (11¯0) direction on top of fcc Cu(001) and Cu(111) surfa...
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We present a systematic study of the magnetic moments and magnetocrystalline anisotropy of finite monoatomic Fen (1<~n<~9) chains deposited along the (11¯0) direction on top of fcc Cu(001) and Cu(111) surfaces as well as embedded into the uppermost three surface layers and into a perfect copper bulk host. The calculations are performed fully relativistically using the embedding technique within the Korringa-Kohn-Rostoker method. We focused our investigations on the effect of the interaction between the Fe atoms as well as between the Fe and host atoms on the magnetic properties of the chains. We found that the calculated spin and orbital moments in the Fe chains are systematically larger than in the corresponding monolayer. Exploring the magnetic anisotropy properties of these systems we obtained a strong out-of-plane easy axis for wires deposited both on the Cu(001) and Cu(111) surfaces, while for the embedded chains the orientation of the easy axis depends on the distance from the surface. We also found remarkable anisotropies for two different in-plane magnetic orientations: namely, for the one parallel and the other perpendicular to the chains.
Rate and diversity impose a fundamental trade-off in space-time coding. High-rate space-time codes come at a cost of lower diversity, and high reliability (diversity) implies a lower rate. We explore a different point...
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Rate and diversity impose a fundamental trade-off in space-time coding. High-rate space-time codes come at a cost of lower diversity, and high reliability (diversity) implies a lower rate. We explore a different point of view where we design high-rate space-time codes that have a high-diversity code embedded within them. This allows a form of communication where the high-rate code opportunistically takes advantage of good channel realizations whereas the embedded high-diversity code ensures that at least part of the information is received reliably. We explore this point of view with design issues, along with some preliminary progress on code constructions and some information-theoretic considerations.
To determine the formation energy and resistivity for domain walls in permalloy (fcc-Ni85Fe15) we use the fully relativistic spin-polarized screened Korringa-Kohn-Rostoker method for layered systems and the correspond...
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To determine the formation energy and resistivity for domain walls in permalloy (fcc-Ni85Fe15) we use the fully relativistic spin-polarized screened Korringa-Kohn-Rostoker method for layered systems and the corresponding Kubo-Greenwood equation in the context of the (inhomogeneous) coherent potential approximation. We find that the difference in formation energy between 90° and 180° domains becomes very small if the domain wall width increases. Furthermore, we show that regardless of the configuration within a domain wall the in-plane components of the resistivity are larger than in a single domain and, in particular, that the anisotropic magnetoresistance ratio within the domain wall vanishes.
Let G be a locally compact Vilenkin group. We will establish the boundedness in Morrey spaces Lp,λ(G) for a large class of sublinear operators and linear commutators.
Let G be a locally compact Vilenkin group. We will establish the boundedness in Morrey spaces Lp,λ(G) for a large class of sublinear operators and linear commutators.
Presents a study that investigated the asymptotic behavior of discrete solutions in comparison to the case of continuous solutions. Numerical representation of the problem; Details on the solution of explicit differen...
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Presents a study that investigated the asymptotic behavior of discrete solutions in comparison to the case of continuous solutions. Numerical representation of the problem; Details on the solution of explicit difference scheme for the corresponding nonlinear elliptic equations; Results and discussion.
The global attractor problem of a dissipative generalized KdV equation with periodic boundary condition was studied. The existence of global attractors of this problem was proved by means of a uniform a priori estimat...
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The global attractor problem of a dissipative generalized KdV equation with periodic boundary condition was studied. The existence of global attractors of this problem was proved by means of a uniform a priori estimate for time.
In this paper we consider the Burger-Ginzburg-Landau equations, and prove the existence of the global attractor in with finite Hausdorff and fractal dimensions.
In this paper we consider the Burger-Ginzburg-Landau equations, and prove the existence of the global attractor in with finite Hausdorff and fractal dimensions.
We introduce a numerical approach to perform the effective (coarse-scale) bifurcation analysis of solutions of dissipative evolution equations with spatially varying coefficients. The advantage of this approach is tha...
We introduce a numerical approach to perform the effective (coarse-scale) bifurcation analysis of solutions of dissipative evolution equations with spatially varying coefficients. The advantage of this approach is that the `coarse model' (the averaged, effective equation) need not be explicitly constructed. The method only uses a time-integrator code for the detailed problem and judicious choices of initial data and integration times; the bifurcation computations are based on the so-called recursive projection method (Shroff and Keller 1993 SIAM J. Numer. Anal. 30 1099-120).
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