Preparation of ultrathin ferric oxide layers using Langmuir-Blodgett films

Brandl, D.; Schoppmann, Ch.; Tomaschko, Ch.; Markl, Jürgen; Voit, H.

doi:10.1016/0040-6090(94)90095-7

Cited by 32 publications

(10 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The concentration of iron atoms increases with increasing pH value as expected from other systems [6], but in samples D and E we find an area density of iron atoms per ML which is in fact 3.5 times higher than the values expected from the stoichiometry of Fe(III)arachidate where one iron atom is connected to three fatty acids and where we calculate an area density of 1.67. 1014Fe atoms/(ML .cm 2) from the area of 0.2 nm 2 for one fatty acid.…”

Section: -Experimentalsupporting

confidence: 62%

Structure and composition of iron-containing langmuir-blodgett films

et al. 1996

Self Cite

View full text Add to dashboard Cite

S u m m a r y . --The composition of differently prepared Langmuir-Blodgett multilayers of ferric arachidate has been investigated by means of absorption MSssbauer spectroscopy and heavy-ion-induced mass spectrometry. We found that the iron concentration in qualitatively good films is 3.5 times higher than the stoichiometric value. Antiferromagnetic ordering in this two-dimensional model substance can be observed when the Fe-Fe distance in the layers is about 0.3 nm or below. The area density of the iron atoms in the planes decreases with decreasing pH values of the subphase which also leads to a disappearance of the long-range magnetic ordering and to a decrease of the Debye temperature of the films which is linearly dependent on the iron concentration in the films.PACS 75.70.Ak -Magnetic properties of monolayers and overlayers. PACS 82.80.Ej -X-ray, MSssbauer and other y-ray spectroscopic analysis methods. PACS 82.80.Ms -Mass spectrometry (including SIMS, multiphoton ionization and resonance ionization mass spectrometry). PACS 01.30.Cc -Conference proceedings. -I n t r o d u c t i o nThe Langmuir-Blodgett technique is a relatively simple method for preparing thin films with a well-defined number of layers by transferring floating organic monolayers onto solid substrates. The main interest in such organized and oriented systems like the LB films arises from the fact that they are ideal two-dimensional systems and have therefore some uncommon electric and magnetic properties which may also have some applications [1]. By preparing multilayers from magnetic ions bound to the polar head groups of long-chain hydrocarbons a two-dimensional model system can be prepared, which gives the possibility to study the magnetic behaviour of quasi-two-dimensional systems [2]. The magnetic behaviour of such twodimensional systems is not yet completely understood.(*) Paper presented at the ICAME-95, Rimini, 10-16 September 1995.

show abstract

Section: -Experimentalsupporting

confidence: 62%

Structure and composition of iron-containing langmuir-blodgett films

et al. 1996

Self Cite

View full text Add to dashboard Cite

show abstract

“…If the appropriate method is chosen, very smooth and homogeneous metal oxide films can be produced. It has been shown already that ultrathin films of Ti oxide (2), Zn oxide (3), ferrous (6) and ferric (4,7,8) 1 To whom correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

A Novel Method for Preparing Ordered SnO2/TiO2 Alternate Nanoparticulate Films

Cao

Wan

Huo

et al. 2001

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

“…Recently, very thin and homogenous metal oxide films have been obtained by the oxidation of a precursor fatty acid salt Langmuir-Blodgett (LB) multilayers [15][16][17][18]. In most cases, the precursor LB multilayer is exposed to heat or UV radiation in air, resulting in oxide formation and removal of organic components.…”

Section: Introductionmentioning

confidence: 99%