Modification of structural and magnetic properties forFe∕Cu(001)by Cr adsorbates

Abstract

We have found that the structural and magnetic properties of perpendicularly magnetized Fe film grown on a Cu͑001͒ substrate are drastically changed by Cr adsorption. The correlation between the structure and magnetism is investigated by a combined study of low-energy electron diffraction and an x-ray magnetic circular dichroism in core-level absorption spectra. The film structures show three different phases depending on the Cr amount. The Cr deposition on the Fe films leads to a reduction of Curie temperature, critical exponent ␤, and the magnetization of Fe. It has been clarified that the structural and magnetic properties of Fe film are modified by slight Cr adsorbates and those properties closely correlate with each other.

Fourfold in-plane magnetic anisotropy in epitaxial Fe(110)/Cu(001) and Fe(110)/Ni(001) bilayers

“…Most experimental studies of Fe/Cu(0 0 1) films show the formation of a variety of structural and magnetic modifications of the g-Fe phase with thickness d Fe fewer than 11 monolayers [8][9][10][11][12][13]. Regardless of the deposition method used, at thicknesses d Fe 411 layers, the g-Fe growth becomes unstable and the bcc Fe(1 1 0) grows epitaxially on Cu(0 0 1) [14][15][16][17][18][19] and on Ni(0 0 1) [19,20].…”

Growth Mode and Surface Structure of Cr Ultrathin Film on Fe/Cu(001)

“…Recently, Yaji et al studied structural and magnetic properties of Cr adsorbed Fe/Cu(001) in the sub monolayer region. They found the similarity of low-energy electron diffraction (LEED) I-V curve of Cr/3-ML Fe/Cu(001) to that of 6-ML Fe/Cu(001), which indicated the structural modification of Fe film upon Cr deposition [13,14]. They also studied the magnetic properties through x-ray magnetic circular dichroism (XMCD) in core-level absorption spectra.…”