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High-pressure synthesis and characterizations of a new ternary Ce-based compound CeTiAs.
J Phys Condens Matter
October 2024
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
Article Synopsis
- A new cerium-based compound, CeTiAs, was synthesized under high-pressure and high-temperature conditions, featuring a hexagonal structure with zig-zag Ce chains.
- This metallic compound has a magnetic phase transition at 13 K and a metamagnetic transition at approximately 0.7 T, indicating complex magnetic behavior.
- Its heavy Fermion behavior, evidenced by a Sommerfeld coefficient of about 215 mJ/(Ce-mol*K), and unique resistivity profile suggest the influence of crystal electric fields and magnetic scattering interactions.
Growth of BaCoWOsingle crystals and their magnetic, thermodynamic and electronic properties.
J Phys Condens Matter
September 2024
Institut für Festkörperphysik, Technische Universität, Berlin, Germany.
Article Synopsis
- This study focuses on the growth and characterization of the cubic double perovskite BaCoWO (BCWO), revealing its unique structural properties.
- BCWO shows long-range antiferromagnetic order below 14 K and exhibits specific magnetic behaviors like anisotropy and spin-flop transitions under strong magnetic fields.
- Optical analysis indicates two gaps in the UV-Visible region, suggesting BCWO's potential use in photocatalysis and photovoltaics, emphasizing the importance of its magnetic and optical properties.
Insight into the Temperature-Dependent Canting of 4f Magnetic Moments from 4f Photoemission.
J Phys Chem Lett
June 2023
Donostia International Physics Center (DIPC), 20018 Donostia/San Sebastián, Basque Country, Spain.
The orientation of the 4f moments offers an additional degree of freedom for engineering the spin-related properties in spintronic nanostructures of lanthanides. Yet, precise monitoring of the direction of magnetic moments remains a challenge. Here, on the example of the antiferromagnets HoRhSi and DyRhSi, we investigate the temperature-dependent canting of the 4f moments near the surface.
View Article and Find Full Text PDFDiffusive excitonic bands from frustrated triangular sublattice in a singlet-ground-state system.
Nat Commun
April 2023
Department of Physics and Astronomy, Rice University, Houston, TX, 77005, USA.
Magnetic order in most materials occurs when magnetic ions with finite moments arrange in a particular pattern below the ordering temperature. Intriguingly, if the crystal electric field (CEF) effect results in a spin-singlet ground state, a magnetic order can still occur due to the exchange interactions between neighboring ions admixing the excited CEF levels. The magnetic excitations in such a state are spin excitons generally dispersionless in reciprocal space.
View Article and Find Full Text PDFEffects of Y- and La-doping on the magnetic ordering, Kondo effect, and spin dynamics in CeRuAl.
J Phys Condens Matter
May 2021
Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, PO Box 524, Auckland Park 2006, South Africa.
The influence of Y- and La-substitution for Ce on the competing Kondo effect and magnetic ordering, as well as on spin dynamics in the Kondo semiconductor CeRuAlhave been investigated by means of thermal, electronic, and magnetic properties. The parent compound CeRuAlis known to be a controversial antiferromagnet with high magnetic ordering temperature= 27 K. A small negative chemical pressure caused by La-doping results rapid suppression ofand spin gap energy Δ, compared to a small positive pressure caused by Y-doping.
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