Results 81 to 90 of about 252,441 (277)

New High‐Tc Charge‐Transfer Multiferroicity in the Quasi‐2D Antiferromagnet CrSbS3

open access: yesAdvanced Science, EarlyView.
ABSTRACT Low‐dimensional magnets, particularly 2D systems, offer a rich platform for realizing unconventional multiferroic mechanisms, especially when multiple polarization channels coexist. In the quasi‐2D antiferromagnet CrSbS3, which crystallizes in the centrosymmetric orthorhombic space group Pnma and orders magnetically at TN ≈ 90 K, two ...
Hung‐Cheng Wu   +17 more
wiley   +1 more source

Identification of the chemical state of Fe in barium hexaaluminate using Rietveld refinement and 57Fe Mouml;ssbauer spectroscopy

open access: yes, 2011
Identification of the chemical state of Fe in barium hexaaluminate using Rietveld refinement and 57Fe Mouml;ssbauer ...
朱燕燕   +5 more
core  

Phase Transition and Phase Fraction Analysis Using Rietveld Refinement

open access: yes
Rietveld refinement has become an essential tool for the quantitative analysis of crystal structures in polycrystalline systems using X-ray diffraction data.
Muhammad Sheeraz   +4 more
core   +1 more source

Polymorphic Superparaelectric Engineering Boosting Energy Storage Capacity in BaTiO3‐Based Ceramics

open access: yesAdvanced Science, EarlyView.
Herein, Ca2+ incorporation promotes the coexistence of CaTiO3‐/BaTiO3‐derived paraferroelectric states, stabilizing cubic‐orthorhombic‐tetragonal polymorphic superparaelectric phases. This minimizes polarization energy barriers, facilitating full polarization saturation without compromising efficiency.
Pan Liu   +9 more
wiley   +1 more source

Anatase/rutile mass fraction determination in TiO2 nanoparticles using Rietveld refinement aiming applications in water purification

open access: yesLabor & Engenho, 2013
Given the growing demand for sanitation solutions, various techniques of wastewater treatment have been proposed. Among them, we highlight the use of photocatalysts.
Egont Alexandre Schenkel   +4 more
doaj   +1 more source

Sustainable Materials Design With Multi‐Modal Artificial Intelligence

open access: yesAdvanced Science, EarlyView.
Critical mineral scarcity, high embodied carbon, and persistent pollution from materials processing intensify the need for sustainable materials design. This review frames the problem as multi‐objective optimization under heterogeneous, high‐dimensional evidence and highlights multi‐modal AI as an enabling pathway.
Tianyi Xu   +8 more
wiley   +1 more source

Application of Multidimensional Rietveld Refinement

open access: yes
We showcase a method development in neutron powder diffraction, primarily driven by the future time-of-flight diffractometer POWTEX, developed in collaboration with Forschungszentrum Jülich at FRM-II in Garching. Within the DAPHNE project, we are expanding these methods for wider applications, emphasizing sustainability.
Meinerzhagen, Yannick   +2 more
openaire   +2 more sources

Structural and Compositional Effects on the Scintillation Properties of Fast Emitting Metal‐Organic Frameworks

open access: yesAdvanced Science, EarlyView.
The crystalline structure, the atomic numbers of the constituent elementsand the size of MOF crystals each influence their photoluminescence and scintillation properties in distinct ways. Together, these factors provide valuable guidelines for designing systems with optimized performance and tunable timing characteristics, arising from the synergistic ...
Francesca Cova   +8 more
wiley   +1 more source

Development of Branched ZnO Microrods: A Comprehensive Structural and Optical Characterization [PDF]

open access: yesIranian Journal of Materials Science and Engineering
In this study, a novel three-step method for the synthesis of ZnO and branched ZnO microrods was developed. Numerous techniques were used to analyze the obtained samples: photoluminescence (PL) spectroscopy, raman spectroscopy, fourier transform infrared
ines dhifallah   +6 more
doaj  

Kinetics of Thermal Transformation of Synthetic Al-Maghemites into Al-Hematites

open access: yesRevista Brasileira de Ciência do Solo
Maghemite (γ-Fe2O3) and hematite (α-Fe2O3) are important iron oxides in Brazilian soils derived from basalt. Maghemite can transform into hematite when exposed to high temperatures. However, isomorphic substitution (e.g., Al3+) may largely influence this
Adriele Galeti Nonaka   +5 more
doaj   +1 more source

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