New tools for calibrating diffraction setups

Kieffer, Jérôme; Valls, Valentin; Blanc, Nils; Hennig, Christoph

doi:10.1107/s1600577520000776

Cited by 170 publications

(126 citation statements)

References 19 publications

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“…Area detector data unwarping was completed using the pyFAI python data analysis package. [ 69 ] GIXRD patterns were also collected between 26° and 33° in 2θ on each sample using a Rigaku SmartLab diffractometer in a parallel beam geometry utilizing Cu Kα radiation with ω fixed at 0.7° in 2θ.…”

Section: Methodsmentioning

confidence: 99%

Metal Nitride Electrode Stress and Chemistry Effects on Phase and Polarization Response in Ferroelectric Hf_0.5Zr_0.5O₂ Thin Films

Fields

Smith

Fancher

et al. 2021

Adv Materials Inter

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Ferroelectric phase stability in hafnium oxide is reported to be influenced by factors that include composition, biaxial stress, crystallite size, and oxygen vacancies. In the present work, the ferroelectric performance of atomic layer deposited Hf 0.5 Zr 0.5 O 2 (HZO) prepared between TaN electrodes that are processed under conditions to induce variable biaxial stresses is evaluated. The post-processing stress states of the HZO films reveal no dependence on the as-deposited stress of the adjacent TaN electrodes. All HZO films maintain tensile biaxial stress following processing, the magnitude of which is not observed to strongly influence the polarization response. Subsequent composition measurements of stress-varied TaN electrodes reveal changes in stoichiometry related to the different preparation conditions. HZO films in contact with Ta-rich TaN electrodes exhibit higher remanent polarizations and increased ferroelectric phase fractions compared to those in contact with N-rich TaN electrodes. HZO films in contact with Ta-rich TaN electrodes also have higher oxygen vacancy concentrations, indicating that a chemical interaction between the TaN and HZO layers ultimately impacts the ferroelectric orthorhombic phase stability and polarization performance. The results of this work demonstrate a necessity to carefully consider the role of electrode processing and chemistry on performance of ferroelectric hafnia films.

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Section: Methodsmentioning

confidence: 99%

Metal Nitride Electrode Stress and Chemistry Effects on Phase and Polarization Response in Ferroelectric Hf_0.5Zr_0.5O₂ Thin Films

Fields

Smith

Fancher

et al. 2021

Adv Materials Inter

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“…X-ray Diffraction: Synthesized samples were characterized by powder X-ray diffraction (PXRD) using a Huber G670 Guinier camera [Cu-K α1 and Co-K α1 radiation, λ = 1.5405929(5) Å and 1.788996(1) Å respectively, 2θ max = 100°, Δ2θ = 0.005°, LaB 6 as internal standard, NIST 660a, a = 4.156916(1) Å] and by high-resolution PXRD [BM20 beamline of the European Synchrotron Radiation Facility (ESRF, Grenoble, France), λ = 0.45916 Å, Δ2θ = 0.0037°, 2θ max = 40°, Debye-Scherrer setup, powder (Ͻ 20 μm) in quartz capillaries of 0.3 mm outer diameter, Pilatus 100k detector with the developed data extraction routine [31] ]. Phase analysis and simulation of theoretical PXRD patterns were done with WinXPow software.…”

Section: Methodsmentioning

confidence: 99%

Ternary MIn₂S₄ (M = Mn, Fe, Co, Ni) Thiospinels – Crystal Structure and Thermoelectric Properties

Wyżga

Veremchuk²,

Bobnar³

et al. 2020

Zeitschrift anorg allge chemie

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A combined structural, magnetic and thermoelectric study of polycrystalline ternary MIn2S4 (M = Mn, Fe, Co, Ni) thiospinels is presented. All compounds crystallize with MgAl2O4‐type structure. Rietveld refinement analysis confirmed that the preferred crystallographic position of transition metal element changes from mainly tetrahedral 8a for Mn to exclusively octahedral 16d for Ni (i.e. increase of the inversion parameter). Magnetic susceptibility measurements revealed M‐elements to possess 2+ oxidation state in MIn2S4. All these compounds order antiferromagnetically with Néel temperatures TN ranging from 5–13 K. The studied thiospinels are n‐type semiconductors with large values of electrical resistivity ρ > 0.6 Ω·m at room temperature. An increase of the inversion parameter leads to a reduction of the determined activation energies, as well as to a more disorder‐like behavior of thermal conductivity. The highest thermoelectric Figure of merit ZT was observed for MIn2S4 with M = Fe, Ni, which adopt inverse spinel structure.

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“…The PONI parameters are: the sampledetector distance (dist), two orthogonal x-and y-dimensions in the detector plane (poni1, poni2), and three rotation parameters around the vertical axis (rot1), around the horizontal axis (rot2) and around the incoming beam (rot3). The calibration procedure is described in more detail by Kieffer et al (2020). The obtained resolution of 0.013 is one order of magnitude better than that of typical laboratory diffractometers, and much faster (typically 5 to 10 min for an excellent signal-to-noise ratio).…”

Section: Xrd-1 (Six-circle Diffractometer)mentioning

confidence: 99%

ROBL-II at ESRF: a synchrotron toolbox for actinide research

et al. 2021

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ROBL-II provides four different experimental stations to investigate actinide and other alpha- and beta-emitting radionuclides at the new EBS storage ring of ESRF within an energy range of 3 to 35 keV. The XAFS station consists of a highly automatized, high sample throughput installation in a glovebox, to measure EXAFS and conventional XANES of samples routinely at temperatures down to 10 K, and with a detection limit in the sub-p.p.m. range. The XES station with its five bent-crystal analyzer, Johann-type setup with Rowland circles of 1.0 and 0.5 m radii provides high-energy resolution fluorescence detection (HERFD) for XANES, XES, and RIXS measurements, covering both actinide L and M edges together with other elements accessible in the 3 to 20 keV energy range. The six-circle heavy duty goniometer of XRD-1 is equipped for both high-resolution powder diffraction as well as surface-sensitive CTR and RAXR techniques. Single crystal diffraction, powder diffraction with high temporal resolution, as well as X-ray tomography experiments can be performed at a Pilatus 2M detector stage (XRD-2). Elaborate radioprotection features enable a safe and easy exchange of samples between the four different stations to allow the combination of several methods for an unprecedented level of information on radioactive samples for both fundamental and applied actinide and environmental research.

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New tools for calibrating diffraction setups

Cited by 170 publications

References 19 publications

Metal Nitride Electrode Stress and Chemistry Effects on Phase and Polarization Response in Ferroelectric Hf_0.5Zr_0.5O₂ Thin Films

Metal Nitride Electrode Stress and Chemistry Effects on Phase and Polarization Response in Ferroelectric Hf_0.5Zr_0.5O₂ Thin Films

Ternary MIn₂S₄ (M = Mn, Fe, Co, Ni) Thiospinels – Crystal Structure and Thermoelectric Properties

ROBL-II at ESRF: a synchrotron toolbox for actinide research

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New tools for calibrating diffraction setups

Cited by 170 publications

References 19 publications

Metal Nitride Electrode Stress and Chemistry Effects on Phase and Polarization Response in Ferroelectric Hf0.5Zr0.5O2 Thin Films

Metal Nitride Electrode Stress and Chemistry Effects on Phase and Polarization Response in Ferroelectric Hf0.5Zr0.5O2 Thin Films

Ternary MIn2S4 (M = Mn, Fe, Co, Ni) Thiospinels – Crystal Structure and Thermoelectric Properties

ROBL-II at ESRF: a synchrotron toolbox for actinide research

Contact Info

Product

Resources

About

Metal Nitride Electrode Stress and Chemistry Effects on Phase and Polarization Response in Ferroelectric Hf_0.5Zr_0.5O₂ Thin Films

Metal Nitride Electrode Stress and Chemistry Effects on Phase and Polarization Response in Ferroelectric Hf_0.5Zr_0.5O₂ Thin Films

Ternary MIn₂S₄ (M = Mn, Fe, Co, Ni) Thiospinels – Crystal Structure and Thermoelectric Properties