Magnetic properties of fcc-Fe artificial superlattices

Distinct magnetic states of metastable fcc structured Fe and Fe–Cu alloys studied by ab initio calculations

“…1 is that for each magnetic state (AFM-1, AFM-2, LSFM, and HSFM), the magnetic moment of the Fe atom in the respective fcc structures seems to be enhanced while the interatomic distance (or the spacing distance) expands. Such a trend was also observed in another ferromagnetic metal Co [26] and was consistent with the corresponding experimental observations [27]. It is also noted that the present calculations show that the minimum total energies of the NM, LSFM, AFM-1 and AFM-2 states are very close to each other, reflecting a close competition among these possible states.…”

Structure and magnetic properties of Fe4/Cun (n=2,4) superlattices from first-principles study

“…Referring back to our former research on Fe3Cux (x ¼ 3, 5), the interlayer distances of Fe layers in Fe3Cu3 and Fe3Cu5 are all expanded, and the magnetic moments for the Fe layers are all above 2.6 m B (2.6-2.78 m B ), which is called the high-ferromagnetic state. The results consist with the experimental and other theoretical results [4,13]. As shown by our research, in fact the changes of Cu layer thickness in Fe3Cux models have not caused obvious differences of the magnetic state between Fe3Cu3 and Fe3Cu5.…”

“…Series fcc-Fe/Cu (0 0 1) superlattices were prepared by the epitaxial growth of fcc-Fe on Cu (1 0 0) layers experimentally by Mitani et al [4] to study the correlation of magnetic moment versus interlayer distance. The prepared fcc-Fe exhibited various magnetic properties, from collinear ferromagnetism (FM), antiferromagnetism (AF), or bilayer antiferromagnetism (bilayer AFM), to a spiral spin structure [5], which also attracted much attention for theoretical investigations.…”

Extended x-ray absorption fine structure studies of the atomic structure of nanoparticles in different metallic matrices

“…This has the added advantage that by varying the composition in the range 0 ≤ x ≤ 0.2, the lattice parameter can be varied between 3.61 Å (for pure Cu) to ~ 3.70 Å (for x = 0.2) while maintaining an fcc structure. Indeed, a number of authors [109][110][111] have used Cu 1-x Au x (100) alloy substrates to grow ultra-thin fcc Fe films with expanded lattice parameter. Embedding Fe clusters in a Cu 1-x Au x matrix should therefore allow fine tuning of the fcc Fe lattice parameter.…”