X-ray excited Auger and photoelectron spectra of magnesium, some alloys of magnesium and its oxide

Fuggle, J. C.; Watson, L. M.; Fabian, D.J.; Affrossman, S.

doi:10.1088/0305-4608/5/2/020

Cited by 115 publications

(31 citation statements)

References 13 publications

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“…Fortunately, the chemical states of MgO and MgB 2 can be distinguished in the Auger spectrum of Mg KLL, although it is difficult to quantify from Auger peaks. As known from the literature, [18] the Mg KL 23 L 23 peak of metallic Mg is composed of two main transitions identified by 1 S and 1 D terms at KE = 1181.5 and 1184.5 eV respectively. The second peak is higher in intensity and is usually considered as the main component.…”

Section: Reference Samplesmentioning

confidence: 63%

“…Two symmetric peaks (a) and (b) are assigned to the 1 D and 1 S transitions respectively, while the third one (c) is introduced just to obtain the best fitting of experimental data, even if it could probably be related to the double ionization process. [18] Atomic concentration of Mg bonded to boron was calculated from the [ 18] www.interscience.wiley.com/journal/sia intensity ratio of the main Mg KLL components by using the following formula:…”

Section: Reference Samplesmentioning

confidence: 99%

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Chemical composition of magnesium boride films obtained by CVD

Crociani

Carta

Kačiulis

et al. 2008

Surface & Interface Analysis

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The films of magnesium boride were grown on Si(100) substrate by chemical vapor deposition, starting from the synthesis of the single-source precursor Mg(BH 4 ) 2 . The deposition time was varied to study its influence on the film composition. The chemical composition of produced samples was investigated by the XPS technique. The depth profiling of MgB x films was carried out by using Ar ion sputtering combined with cyclic XPS measurements. The contributions of different chemical species (boride and oxides) in the depth profiles were separated by peak-fitting analysis of photoelectron B 1s and Auger Mg KLL spectra. In order to determine the correct parameters of peak fitting, the reference samples of MgB 2 and MgO were studied as well. The produced samples were composed of MgB x film covered by an overlayer of magnesium and boron oxides, whose thickness was increasing with deposition time. The surface of the films was enriched with magnesium, while the volume was characterized by the B : Mg ratio exceeding 2. XPS results confirmed that the bulk decomposition of Mg(BH 4 ) 2 precursor was successful; therefore, some other phenomenon, such as Mg segregation, was responsible for the formation of MgB x films with x > 2. In addition, a prolonged deposition time resulted in a thicker surface overlayer of Mg and B oxides, but it did not change the stoichiometry of the boride film.

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Section: Reference Samplesmentioning

confidence: 63%

Section: Reference Samplesmentioning

confidence: 99%

Chemical composition of magnesium boride films obtained by CVD

Crociani

Carta

Kačiulis

et al. 2008

Surface & Interface Analysis

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“…The reported Mg 1s peak position for the oxidized state is 1305.3 eV, while that of the metallic state is 1303.5 eV. 10,11) The oxidized state of magnesium was observed not only for the device kept in the bath, but also as a naturally grown magnesium oxide layer on the surface of the as-prepared device. In addition, the inner part of the optical switching layer contained a mixture of metallic and oxidized states of magnesium.…”

Section: Surface State Analysis By Xpsmentioning

confidence: 98%

Surface Analysis of Electrochromic Switchable Mirror Glass Based on Magnesium-Nickel Thin Film in Accelerated Degradation Test

et al. 2011

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With the capability to change between reflective and transparent states, electrochromic switchable mirrors are expected to have numerous applications in optical devices, electronics devices and new energy-saving windows. If conventional windows can be adapted to incorporate switchable mirror technology, the solar radiation coming into a room could be effectively controlled, owing to features of the reflective state. Conventional windows are often subjected to environmental conditions such as high temperature and humidity. Considering practical use, we investigated the effects of the environment on the optical switching properties of the device in accelerated degradation tests using a thermostat/ humidistat bath at a constant temperature of 313 K and constant relative humidity of 80%. When the device was kept in the bath for 950.4 ks, it lost its optical switching properties. This result was associated with the degradation of the surface layer of the Mg 4 Ni thin film, which became rougher with increasing bath duration. We confirmed that the layer contained species in non-metallic states of oxide and hydroxide. Furthermore, the degradation mechanism to form the mixture state depended on the holding time in the bath.

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“…As is known from the literature, the MgKL 23 L 23 peak is composed of two transitions: one is identified with the symbol 1 S, and the other one is identified with 1 D. Characteristic KLL spectrum of metallic Mg can be described as a composition of two synthetic peaks at KE = 1181.5 eV ( . [17] The second one is higher in intensity and it is usually considered to be the main component. The difference of these two peaks in KE is low, therefore the peak-fitting routine is required in order to separate individual contributions.…”

Section: Reference Samplesmentioning

confidence: 99%

Study of Magnesium Boride Films Obtained From Mg(BH₄)₂ by CVD

Crociani¹,

Rossetto²,

Kačiulis³

et al. 2007

Chemical Vapor Deposition

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Magnesium boride films are synthesized from Mg(BH 4 ) 2 by CVD. A new synthesis of the precursor is developed. Deposition time of the samples is varied to study its influence on film composition. The films are analyzed by means of X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The contributions of various chemical species (boride and oxides) in the depth profiles, carried out using Ar ion sputtering combined with cyclic XPS measurements, are separated by peak-fitting analysis of photoelectron B1s and Auger MgKLL spectra. The samples are composed of MgB x film covered by an overlayer of magnesium and boron oxides.

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X-ray excited Auger and photoelectron spectra of magnesium, some alloys of magnesium and its oxide

Cited by 115 publications

References 13 publications

Chemical composition of magnesium boride films obtained by CVD

Chemical composition of magnesium boride films obtained by CVD

Surface Analysis of Electrochromic Switchable Mirror Glass Based on Magnesium-Nickel Thin Film in Accelerated Degradation Test

Study of Magnesium Boride Films Obtained From Mg(BH₄)₂ by CVD

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X-ray excited Auger and photoelectron spectra of magnesium, some alloys of magnesium and its oxide

Cited by 115 publications

References 13 publications

Chemical composition of magnesium boride films obtained by CVD

Chemical composition of magnesium boride films obtained by CVD

Surface Analysis of Electrochromic Switchable Mirror Glass Based on Magnesium-Nickel Thin Film in Accelerated Degradation Test

Study of Magnesium Boride Films Obtained From Mg(BH4)2 by CVD

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Study of Magnesium Boride Films Obtained From Mg(BH₄)₂ by CVD