Fe epitaxial layers on Cu3Au(001): a structural study by primary-beam diffraction modulated electron emission

Luches, Paola; Bona, A. di; Valeri, Sergio; Canepa, M.

doi:10.1016/s0039-6028(00)00882-7

Cited by 10 publications

(7 citation statements)

References 33 publications

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“…7,[17][18][19] Although a more sophisticated dynamic LEED technique is available, 20 the kinematic LEED analysis has been widely accepted to effectively monitor the average vertical lattice structure of the deposited films. In the relevant case of Fe/Cu 3 Au(001), kinematic LEED is shown to be a reliable technique providing results consistent with most works [21][22][23][24] of different groups using various techniques. For the magnetic properties, the magneto-optical Kerr effect (MOKE), assisted by the lock-in technique, of both longitudinal and polar geometries, was used to measure the hysteresis loops of the magnetic thin films.…”

Section: Methodssupporting

confidence: 76%

Driving magnetization perpendicular by antiferromagnetic-ferromagnetic exchange coupling

Wang

Jih

Lin³

et al. 2011

Phys. Rev. B

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Using x-ray photoemission electron microscopy and the magneto-optical Kerr effect, we have demonstrated a perpendicular magnetic anisotropy that could be due to exchange coupling between the ferromagnetic and antiferromagnetic layers. The results of magnetic imaging and hysteresis loops show that the magnetization of Fe and permalloy (Py) films orients from the in-plane to perpendicular direction, as an Mn underlayer is above a threshold value that depends on the Fe or Py layer thickness. Their thickness-dependent behaviors can be quantitatively described by a phenomenological model that takes into account the finite-size effect of the antiferromagnet on exchange coupling. The anisotropy energy extracted from the model and the thermal stability of perpendicular magnetization enhanced with the increase of the Mn underlayer further demonstrate the exchange coupling nature.

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Section: Methodssupporting

confidence: 76%

Driving magnetization perpendicular by antiferromagnetic-ferromagnetic exchange coupling

Wang

Jih

Lin³

et al. 2011

Phys. Rev. B

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“…The Au lines reduce their intensities up to reach approximately 10% of the clean surface value at 5.5 Å thickness, and thereafter remain constant for increasing coverage. Comparing our findings with previous investigations, 3,21 we can conclude that the relative amount of Cu interdiffused or segregated in the film is below 1%, whereas approximately 0.2± 0.1 monolayers of Au are segregated at the surface.…”

Section: A Structuresupporting

confidence: 83%

Correlation between magnetism and structure in ultrathinFe∕Cu3Au(001)films

et al. 2005

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We have studied the correlation between the magnetic properties and the structure of ultrathin ferromagnetic Fe/ Cu 3 Au͑001͒ films for thicknesses up to 15 Å. We have found that two different face centered tetragonal structural phases coexist within the film in the thickness range 5-15 Å. The coexistence of the two structural phases induces an anomalous thickness dependence of the Curie temperature of the films. We ascribe this thickness dependence to a difference in the exchange coupling between the two phases. The irreversible modifications of the magnetic properties of the films after a mild thermal treatment are discussed on the basis of the corresponding changes of the structure and the morphology.

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“…As has already been reported for surface alloys [7], chemical disorder may have a direct influence on the preferred orientation of the magnetization. Indeed, in Fe=Cu 3 Auð0 0 1Þ it has been found evidence of the presence of limited amounts of Au (less than 0:1 ML) at the topmost layer, and lower concentrations at the underlying layers [6]. This trend has also been reported for Fe=Auð0 0 1Þ [2].…”

mentioning

confidence: 55%

“…The Fe=Cu 3 Auð0 0 1Þ system features a complex evolution of the magnetic and structural properties as a function of the thickness of the Fe slab [4,5]. The ferromagnetic Fe phase is obtained for coverages over 1 ML: Initially, the magnetization aligns perpendicular to the surface and a magnetic reorientation transition (MRO) to the in-plane direction occurs at coverages between 2.5 and 3:5 MLs: A structural transformation from a pseudomorphic FCC towards a BCT phase exists at coverages of 4-5 MLs [4][5][6]. The magnetic phase transition of Fe=Cuð0 0 1Þ has been correlated to the structural transformation from a FCT to a FCC lattice [1].…”

mentioning

confidence: 99%