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Article
Mössbauer spectroscopy of ZnxMg1-x Fe2O4 (0 ≤ x ≤ 0.74) nanostructures crystallized from borate glasses
Glasses in the system 51.7 B2O3/9.3 K2O/1 P2O5/10.4 Fe2O3/(27.6 − y) MgO/y ZnO (with y = 0, 1, 2.5, 5, 7.5, 10, 13.8, and 20) were prepared by the conventional melt quenching method. The glass samples were therma...
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Article
Concentration Quenching of Tb3+ Doped SiC:H and AlN Thin Films in Photoluminescence and Cathodoluminescence Measurements
We present a systematic study of photo- and cathodoluminescence measurements in the visible of Terbium doped SiC:H and AlN thin films. The Terbium atomic concentrations vary from 0.9 to 10% for the SiC:H and f...
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Article
Open AccessMicrostructure of TiN coatings synthesized by direct pulsed Nd:YAG laser nitriding of titanium: Development of grain size, microstrain, and grain orientation
Pure titanium was irradiated by pulsed Nd:YAG laser irradiation in nitrogen atmosphere. As a result, nitrogen uptake and diffusion occurred and a TiN layer was synthesized at the titanium surface. These TiN co...
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Article
The influence of rf plasma time on the carbonitriding treatment of titanium
Inductively coupled radio frequency plasma surface treatment was applied to commercially pure titanium sheets. The goal was to increase the efficiency of the carbonitriding process, i.e., to decrease the plasm...
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Article
Synthesis of highly oriented TiNx coatings by free-electron laser processing of titanium in nitrogen gas
Titanium substrates were irradiated in pure nitrogen gas by means of a free-electron laser. The treatment resulted in the formation of δ-TiNx coatings, with surface stoichiometry x≈1 and thickness of about 15 μm....
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Article
Nitrogen irradiation of Fe/Si bilayers: nitride versus silicide phase formation
In the course of a systematic investigation of heavy ion-irradiated Fe/Si layers, we have studied atomic transport and phase formation induced by 22-keV 14N2+ ion implantation in 57Fe(30 nm)/Si bilayers at high f...
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Article
Variation of the mechanical properties of pulsed laser deposited PMMA films during annealing
The structural and mechanical properties of polymethyl methacrylate (PMMA) thin films produced by pulsed laser deposition in ultra-high vacuum were investigated by infrared spectroscopy, electron microscopy, s...
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Article
Laser hydriding of crystalline and amorphous silicon
Crystalline and ion-beam-amorphized silicon samples were irradiated with a pulsed nanosecond excimer laser in a pure hydrogen atmosphere. The hydrogen concentration was determined via the 1H(15N,αγ)12C nuclear re...
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Article
Ion-beam mixing in Fe/Si bilayers by singly and highly charged ions: evolution of phases, spike mechanism and possible effects of the ion-charge state
Silicide formation and ion beam mixing of Fe/Si bilayers due to Ar-, Xe- and Au-ion irradiations at room and liquid-nitrogen temperatures were investigated. For the study of silicide phase formation, the Fe/Si...
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Chapter
Cems Studies of Laser Treated Disordered Amorphous and Nanocrystalline Alloys
Conversion electrons provide information from a depth of about 150 nm for most iron rich alloys. Thus, surface effects can be effectively studied by means of Conversion Electron Mössbauer Spectroscopy (CEMS). ...
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Chapter
Mössbauer Investigation of Surface Processing by Pulsed Laser Irradiation in Reactive Atmospheres
Irradiations of iron (Armco, Fe > 99.85%) substrates in controlled gaseous atmospheres (nitrogen and methane) have been performed with nanosecond pulses of an excimer laser, leading to the formation of nitride...
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Chapter
Moms — Magnetic Orientation Mössbauer Spectroscopy: Determination of Spin Orientations in Ion Irradiated Iron Films
Here, a xenon-ion induced magnetic texturing of iron films using depth-sensitive and angle-dependent Conversion Electron Mössbauer Spectroscopy as Magnetic Orientation Mössbauer Spectroscopy (MOMS) in combinat...
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Chapter
Mössbauer and Atomic Force Microscopy Observations of Modified Surfaces of Fe-Si Steel
Detailed surface structure investigations by microscopic methods and microhardness measurements of modified Fe-6at.%Si steel samples are presented here. It is found that a preceding mechanical and heat treatme...
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Chapter and Conference Paper
Mössbauer Optimization of the Direct Synthesis of β-FeSi2 by Ion Beam Mixing of Fe/Si Bilayers
At present, there is an increasing interest in the iron di-silicide phase β-FeSi2, which is supposed to be a direct band gap semiconductor and one of the most promising materials for silicon-based optoelectronics...
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Article
Direct synthesis of β-FeSi2 by ion beam mixing of Fe/Si bilayers
The iron di-silicide β-FeSi2 is a promising direct band gap semiconductor but difficult to produce. Here, the successful direct synthesis of this phase by ion beam mixing of Fe/Si bilayers at temperatures in the ...
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Article
Analysis of laser-nitrided stainless steel via nuclear methods
Laser nitriding of iron and other metals is governed by the complicated interplay of the laser–plasma–liquid surface interactions which lead to a superposition of several mechanisms. This article reports on t...
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Article
The Structure of Antigen-Antibody Layers Adsorbed on Silica Surfaces: a Scanning Angle Reflectometry Study
Scanning Angle Reflectometry (SAR) is used to investigate the structure of protein layers deposited sequentially, first the antigen and then the antibody, on a silica surface. The reflectivity curves are analy...
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Article
Structural and magnetic properties of La/Fe multilayers
The structural and magnetic properties of La/Fe multilayers were investigated by X-ray diffraction, RHEED, magnetometry and57Fe Mössbauer spectroscopy. Comparison is made with previous results obtained for Ce/Fe ...
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Article
Laser nitriding of iron: Influence of the laser parameters on the nitriding efficiency
Laser nitriding of Armco iron in nitrogen was studied for KrF-excimer-laser irradiation. The influence of the energy density and number of pulses on the nitrogen take-up and the nitride phases formed was inves...
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Article
Structural changes during Ar-ion irradiation of laser-deposited Fe/Ag multilayers
During 350 keV Ar+ irradiation at 77K, laser-deposited Fe−Ag multilayers first show stress relaxation and demixing processes at the interfaces followed by grain coarsening and a supersaturation of the bcc α-Fe ph...