Structure determination for Fe films on Cu(100)

Magnetic moments of fcc Fe overlayers on Cu(100) and Co(100)

“…According to the LEED I-V results in Ref. 3 only the topmost two interlayer distances are enhanced (d 12 ϭ1.84 Å; d 23 ϭ1.80 Å) with respect to the interlayer distance in the interior (1.77 Å). In the third region, above 10 ML Fe, the structure gradually converts to bcc.…”

Limits of metastable epitaxy: The structure of ultrathin Fe films onCu3Au(100)

“…The corresponding angle has to be determined separately in the course of the LEED optimization. 9 A program developed by Moritz was used 30 for the calculation of LEED intensities. In this program symmetry adapted functions are used to reduce the angular momentum components and the layer doubling method is employed to stack the layers.…”

“…8 For coverage between 5 and 11 ML all iron layers except the top layer are unreconstructed and have a smaller atomic volume of V a ϭ11.4Å 3 . [8][9][10] These layers presumably show antiferromagnetic coupling. 8,10 The top layer is reconstructed in p2mg(2ϫ1) symmetry and shows a high spin FM state with an enlarged volume of 12.1 Å 3 .…”

“…8,10 The top layer is reconstructed in p2mg(2ϫ1) symmetry and shows a high spin FM state with an enlarged volume of 12.1 Å 3 . 6,9,10 Above 11 ML, iron grows in a bcc modification where the ͑110͒ surface plane is parallel to the ͑100͒ substrate surface. 17,18 On the other hand, Fe films on Ag͑100͒ ͑Refs.…”

“…Iron is a prime example since it shows a rich variety of structural and magnetic phases and thus offers ideal testing grounds to confirm the ability of influencing film structure by using different substrates. [6][7][8][9][10][11][12] Indeed, it was possible to create different structural and magnetic states of Fe depending on the lattice parameter of the substrate. For Cu͑100͒ and related systems like Ni/Cu͑100͒ ͑Refs.…”