Magnetism of step-decorated Fe on Pd„110..
نویسندگان
چکیده
We investigate the growth and magnetic properties of submonolayer Fe wedges on a stepped Pd~110! substrate with reflection high-energy electron diffraction ~RHEED! and the surface magneto-optic Kerr effect. RHEED suggests that Fe atoms decorate the steps to form nanostripes. These stripes are ferromagnetic above 0.3 monolayer Fe coverage, or ;6 Å average stripe width, and have a magnetic easy axis along the surface normal. The onset temperatures of the broadened transition exhibit finite-size scaling with a shift exponent l of 1.260.3, consistent with two-dimensional Ising expectations. The coercivity is less temperature dependent than the magnetization.
منابع مشابه
One –step synthesis of PdCo alloy nanoparticles decorated on reduced grahene oxide as an Electro-catalyst for Oxygen Reduction Reaction in Passive Direct Methanol Fuel Cells
We report a Pd-Co (3:1)/graphene oxide (Pd3Co /GO) catalyst through a one-step strategy. GO is synthesized from graphite electrodes using ionic liquid-assisted electrochemical exfoliation. Controllable GO-supported Pd3Co electrocatalystis then was reduced by ethylene glycol as a stabilizing agent to prepare highly dispersed PdCo nanoparticles on carbon graphene oxide to be used as oxygen reduct...
متن کاملGrowth and magnetism of self-organized arrays of Fe(110) wires formed by deposition on kinetically grooved W(110)
Homoepitaxy of W(110) and Mo(110) is performed in a kinetically-limited regime to yield a nanotemplate in the form of a uniaxial array of hills and grooves aligned along the [001] direction. The topography and organization of the grooves were studied with RHEED and STM. The nanofacets, of type {210}, are tilted ∼ 18◦ away from (110). The lateral period could be varied from 4 to 12 nm by tuning ...
متن کاملStructure, magnetism, and adhesion at Cr/Fe interfaces from density functional theory
Properties of the Cr(100)/Fe(100) and Cr(110)/Fe(110) interfaces are investigated with spin-polarized density functional theory within the generalized gradient approximation (DFT-GGA) for electron exchange and correlation. Contrary to earlier predictions for a monolayer of Cr on bulk Fe, we find intermixing of Cr and Fe at the interface of thick films to be endothermic; hence here we focus on c...
متن کاملMagnetism of 3d Transition Metals and Magnetic Anisotropy of one-dimension Ni Chains on Au(110)-(1×2): A Noncollinear ab− initio Density-Functional-Theory Study
Based on Density Functional Theory (DFT) with non-collinear-magnetism formulations, we have calculated the magnetism of single atom of 3d transition metals and the magnetic anisotropy of supported Ni chains on Au(110)-(1×2) surface. Our results show that surface relaxations enhance the orbital moments of left-end elements (Ti,V) and quench the orbital moments of right-end elements (Fe,Co,Ni) on...
متن کاملDzyaloshinskii-Moriya interaction accounting for the orientation of magnetic domains in ultrathin films: Fe/W(110)
Combining relativistic first-principles calculations with a micromagnetic model, we establish the Dzyaloshinskii-Moriya interaction as an important mechanism in thin-film magnetism, determining the orientation of magnetic domains relative to the lattice, the type of domain wall, and the rotational direction of the magnetization in the wall. Applying the analysis to two monolayers Fe on W 110 , ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2001