Results 51 to 60 of about 17,348 (202)

Valence-Bond Crystal, and Lattice Distortions in a Pyrochlore Antiferromagnet with Orbital Degeneracy

, 2005
We discuss the ground state properties of a spin 1/2 magnetic ion with threefold $t_{2g}$ orbital degeneracy on a highly frustrated pyrochlore lattice, like Ti$^{3+}$ ion in B-spinel MgTi$_2$O$_4$.
A. P. Ramirez, G. Jackeli, J. Villain, K. I. Kugel, M. Blume, M. Takahashi, M. Takhashi, N. B. Perkins, S. Di Matteo, S. Di Matteo, W. Harrison   +10 more
core   +1 more source

High‐Efficiency CO2 Electrolysis Enabled by Interface‐Engineered Composite Electrolytes in Ni‐Based SOEC

Advanced Science, EarlyView.
This study addresses the critical issue of delamination between YSZ and GDC electrolytes in SOECs, which is caused by Thermal deformation disparity. A novel YSZ‐GDC composite interlayer, fabricated using a simple dip‐coating method, is introduced to solve this problem. This layer effectively suppresses delamination by mitigating thermal stress.
Rustam Yuldashev, Hyunchul Jung, Ji Hoon Park, Jin Hee Lee, Min‐Chul Kim   +4 more
wiley   +1 more source

Stepwise Reduction of Ruthenium and Growth of Magnetic Structure During Hydrothermal Crystallisation of SrRu2O6 from KRuO4

Angewandte Chemie, Volume 138, Issue 2, 9 January 2026.
In situ neutron powder diffraction data collected while heating the Ru(VII) reagent KRuO4 in the presence of aqueous Sr2+ reveal the crystallisation of a Ru(VI) oxyhydroxide before the expected Ru(V) oxide; at the same time evolution of antiferromagnetism in the final SrRu2O6 product follows the growth of its crystal structure.
Mark Crossman, Craig I. Hiley, Helen Y. Playford, Chris M. Goodway, Ronald I. Smith, Thomas C. Hansen, Richard I. Walton   +6 more
wiley   +2 more sources

Upconversion luminescence of pyrochlore structured (A2B2O7) phosphors

Optical Materials: X
The pyrochlore-structured (A2B2O7) compounds have emerged as a focal point in contemporary research and materials science, captivating attention for their intriguing properties such as photoluminescence, superconductivity, ionic mobility, and potential ...
B.V. Naveen Kumar, H.C. Swart, R.E. Kroon   +2 more
doaj   +1 more source

Ferromagnetic transition in the double-exchange model on the pyrochlore lattice [PDF]

, 2010
The double-exchange model, which has been extensively studied in the context of colossal magneto-resistance in perovskite manganese oxides, is known to exhibit a ferromagnetic metallic state at low temperatures because of the interplay between localized ...
Furukawa, Nobuo, Motome, Yukitoshi
core   +1 more source

Hierarchical Embedded Sphere Model: An Interpretable ML‐Guided Multiscale Descriptor Engineering Decodes OER Activity on TM@MO2 Catalysts

Advanced Science, EarlyView.
Hierarchical Embedded Sphere Model combines DFT and interpretable machine learning to decode catalytic activity on TM‐doped MO2. It disentangles global electronic, active‐site, and local coordination effects, revealing two activation mechanisms: dopant‐driven (Rh@MO2) and coordination‐mediated (Fe@ZrO2).
Ziyuan Li, Shan Gao, Yunhan Wang, Yueyu Zhang, Weichao Wang, Xiangmei Duan   +5 more
wiley   +1 more source

$Z_Q$ Topological Invariants for Polyacetylene, Kagome and Pyrochlore lattices [PDF]

, 2010
Adiabatic $Z_Q$ invariants by quantized Berry phases are defined for gapped electronic systems in $d$-dimensions ($Q=d+1$). This series includes Polyacetylene, Kagome and Pyrochlore lattice respectively for $d=1,2$ and 3.
Creutz M., Hatsugai Y., I. Maruyama, Katsura H., Matsuhira K., Y. Hatsugai   +5 more
core   +2 more sources

Stuffed rare earth pyrochlore solid solutions [PDF]

Journal of Solid State Chemistry, 2006
Synthesis and crystal structures are described for the compounds Ln2(Ti2-xLnx)O7-x/2, where Ln = Tb, Dy, Ho, Er, Tm, Yb, Lu, and x ranges from 0 to 0.67. Rietveld refinements on X-ray powder diffraction data indicate that in Tb and Dy titanate pyrochlores, extra Ln3+ cations mix mainly on the Ti4+ site with little disorder on the original Ln3+ site ...
Lau, G. C., Muegge, B. D., McQueen, T. M., Duncan, E. L., Cava, R. J.   +4 more
openaire   +2 more sources

Innovative Approach to Hydrogen Purification: A Review on the Role of Metal Hydrides

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Metal hydrides, renowned for their unique hydrogen bonding capabilities, have emerged as pivotal materials in the energy sector, particularly for hydrogen storage and purification applications. Their ability to store hydrogen reversibly under moderate conditions has positioned them at the forefront in hydrogen‐based energy systems. This review
T. Mohammed Faheem, Vinod Kumar Sharma, A. Shaija, Bhaskar Das, Ranjith Krishna Pai   +4 more
wiley   +1 more source

Fe,Mg-Codoped Bismuth Tantalate Pyrochlores: Crystal Structure, Thermal Stability, Optical and Electrical Properties, XPS, NEXAFS, ESR, and ⁵⁷Fe Mössbauer Spectroscopy Study

Inorganics, 2022
The effect of Fe and Mg-codoping on the crystal structure, optical and dielectric properties of bismuth tantalate-based pyrochlores has been studied. Samples of Bi2MgxFe1−xTa2O9.5−Δ (x ≤ 0.7) are characterized by a porous dendrite-like microstructure. Fe,
N. A. Zhuk, M. G. Krzhizhanovskaya, A. V. Koroleva, V. G. Semenov, A. A. Selyutin, A. M. Lebedev, S. V. Nekipelov, D. V. Sivkov, V. V. Kharton, V. P. Lutoev, B. A. Makeev   +10 more
doaj   +1 more source