Growth, structure and morphology of ultrathin iron films on Cu(100)

Thomassen, J.; Feldmann, B.; Wuttig, Matthias

doi:10.1016/0039-6028(92)90195-c

Cited by 120 publications

(30 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Only a brief description of the system, the preparation of the sample, and the characterization of the growth and the film structure will be given here because the apparatus and the sample treatment have already been presented elsewhere. 20 The results of our growth and structure investigation are found in Ref. 19.…”

Section: Methodsmentioning

confidence: 60%

Antiferromagnetic coupling in fcc Fe overlayers on Ni/Cu(100)

Schirmer

Wuttig

1999

Phys. Rev. B

Self Cite

View full text Add to dashboard Cite

Magnetic properties of ultrathin fcc Fe overlayers on Ni/Cu͑100͒ have been determined to study the influence of a magnetic interface. Three regions of different magnetic behavior are distinguished by magneto-optic Kerr ellipsometry, in line with previous studies of Fe/Co/Cu͑100͒ and Fe/Ni/Cu͑100͒. These magnetic states are closely related to the film structure. Above 10 monolayers ͑ML͒, the iron films are homogeneously magnetized and adopt the bcc phase. Very thin films up to 2.5 ML are homogeneously magnetized as well but show an fcc structure in conjunction with a (4ϫ1) reconstruction. The most complex magnetic properties characterize Fe films between 5 and 10 ML. In this thickness range the iron films are not homogeneously magnetized. Instead ferromagnetism is only observed at the Fe film surface and the Fe/Ni film interface. The surface magnetization is apparently correlated with an enlarged atomic volume at the surface and a (2ϫ1) surface reconstruction. Additionally, the magnetic Ni substrate induces ferromagnetic order in the Fe film at the Fe/Ni interface. The coupling of the two ferromagnetic portions of the film shows a strong temperature dependence. This is attributed to the temperature dependence of the bilinear and biquadratic exchange coupling. At low temperature an antiferromagnetic coupling between the two ferromagnetic portions is observed. With increasing temperature this is followed by a canted spin arrangement and finally a ferromagnetic coupling. ͓S0163-1829͑99͒07041-1͔

show abstract

Section: Methodsmentioning

confidence: 60%

Antiferromagnetic coupling in fcc Fe overlayers on Ni/Cu(100)

Schirmer

Wuttig

1999

Phys. Rev. B

Self Cite

View full text Add to dashboard Cite

show abstract

“…Epitaxial monolayer thin films and submonolayer structures represent model systems at the crossover between bulk and truly atomic structures and are studied extensively for this reason. [1][2][3][4][5][6][7][8] To account for the dependence of the magnetism of epitaxial films on electronic and structural film properties, phenomenological quantities, such as magnetocrystalline, magnetoelastic, interface, or step anisotropy energies have been introduced and applied successfully during the past 2 decades of research. 3,7,[9][10][11][12][13] These parameters are chosen to reflect the symmetry of the observed magnetic anisotropy and usually hide details of the sample structure.…”

Section: Introductionmentioning

confidence: 99%

Structure and magnetism of atomically thin Fe layers on flat and vicinal Pt surfaces

et al. 2006

View full text Add to dashboard Cite

Ultrathin Fe films on Pt substrates have been investigated under ultrahigh vacuum conditions by scanning tunneling microscopy, low energy electron diffraction, magneto-optical Kerr effect, x-ray magnetic circular dichroism measurements, and Kerr microscopy. We present a comparison between Fe films on flat Pt͑111͒ and stepped Pt͑997͒, with particular focus on the magnetic anisotropy in the submonolayer thickness range below 0.2 monolayer coverage, and above the spin reorientation transition at 3 monolayer thickness. The comparison of structure and magnetism suggests that the perpendicular easy axis found for films thinner than three monolayers is due to dominating contributions from both film interfaces to the anisotropy energy. The Fe-Pt interface contribution has its origin in the hybridization of the Fe 3d with the Pt 5d band. The in-plane magnetic anisotropy above 3 atomic layers film thickness can be correlated directly with peculiarities of the film structure.

show abstract

“…These approaches for producing topmost surface structures are crucial for investigating physical, chemical, and electronic properties of bimetallic alloy surfaces. [1][2][3][4][5][6][7][8][9] For example, epitaxial growth of Cr on a clean Cu(100) surface provides an interesting template for thin film growth. [10][11][12][13] For Fe ultrathin film growth on Cu(100), it is well known that fcc-Fe grows at room temperature (RT) with thickness of less than ca.…”

Section: Introductionmentioning

confidence: 99%

“…10 monolayers (ML). 5,6,[14][15][16][17][18][19] In contrast, although fcc-Cr (lattice parameter of 0.368 nm) closely resembles fcc-Cu (0.361 nm) and fcc-Fe (0.358 nm), a bcc-Cr thin film grows on Cu(100) even at the initial growth stage. 11) In addition, MBE-fabricated bimetallic alloy surfaces are extremely useful for elucidating alloys' catalysis because the topmost surface atoms of bimetallic systems are expected to have different properties for adsorption and desorption of molecules.…”

Section: Introductionmentioning

confidence: 99%

Infrared Reflection Absorption Study for Carbon Monoxide Adsorption on Chromium Deposited Cu(100) Surfaces

et al. 2009

View full text Add to dashboard Cite

This study investigates carbon monoxide (CO) adsorption and desorption behaviors on 0.1-0.6-nm-thick Cr-deposited Cu(100) surfaces using infrared reflection absorption (IRRAS) and temperature-programmed desorption (TPD) spectroscopic methods. The low-energy electron diffraction (LEED) pattern for the 0.1-nm-thick Cr-deposited Cu(100) surface indicates that distorted bcc-Cr(110) grows on fcc-Cu(100). The CO exposure to a clean Cu(100) at 90 K produces a single and sharp IR absorption band at 2090 cm À1 that is attributable to adsorbed CO on the on-top site of the Cu atoms' on the surface. Two absorption bands are located at 2085 and 2105 cm À1 on the IRRAS spectrum for the COsaturated 0.1-nm-thick Cr/Cu(110) surface. The former might originate from linearly bonded CO on the uncovered Cu substrate surface. With increasing Cr thickness, the latter high-frequency band becomes prominent. For the 0.3-nm-thick Cr surface, the band at 2117 cm À1 dominates all spectra through CO exposure. The TPD spectra of the Cr-deposited Cu surfaces show two remarkable features at 220-250 and 320-390 K, which are ascribable respectively to Cu-CO and Cr-CO bonds. Lower desorption peaks shift to higher temperatures with increasing Cr thickness. Based on TPD and IRRAS results, adsorption-desorption behaviors of CO on the Cr-deposited Cu(100) surfaces are discussed herein.

show abstract

Growth, structure and morphology of ultrathin iron films on Cu(100)

Cited by 120 publications

References 33 publications

Antiferromagnetic coupling in fcc Fe overlayers on Ni/Cu(100)

Antiferromagnetic coupling in fcc Fe overlayers on Ni/Cu(100)

Structure and magnetism of atomically thin Fe layers on flat and vicinal Pt surfaces

Infrared Reflection Absorption Study for Carbon Monoxide Adsorption on Chromium Deposited Cu(100) Surfaces

Contact Info

Product

Resources

About