We report the electronic and magnetic properties of stoichiometric CeAuBi single crystals. At ambient pressure, CeAuBi orders antiferromagnetically below a Néel temperature ( ) of 19 K. Neutron diffraction experiments revealed an antiferromagnetic propagation vector , which doubles the paramagnetic unit cell along the axis. At low temperatures several metamagnetic transitions are induced by the application of fields parallel to the axis, suggesting that the magnetic structure of CeAuBi changes as a function of field. At low temperatures, a linear positive magnetoresistance may indicate the presence of band crossings near the Fermi level. Finally, the application of external pressure favors the antiferromagnetic state, indicating that the 4 electrons become more localized.
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http://dx.doi.org/10.1103/PhysRevB.101.214431 | DOI Listing |
J Phys Chem Lett
January 2025
Shanghai Key Laboratory of Magnetic Resonance, Institute of Magnetic Resonance and Molecular Imaging in Medicine, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, P. R. China.
In traditional operations of all-solid-state lithium metal batteries (ASSLMBs), a small thin lithium metal circular disk is employed as a lithium metal anode (LMA). However, ASSLMBs with a circular-disk LMA often fail in <150 cycles with low capacity retention. In this work, we developed a new ring-shaped LMA to improve cyclability.
View Article and Find Full Text PDFJ Hand Surg Am
January 2025
Department of Orthopaedic Surgery, University of Utah Hospital, Salt Lake City, UT. Electronic address:
Purpose: Controversy exists regarding the optimal imaging modality (magnetic resonance imaging, ultrasound, stress radiographs) for identification of patients with grossly unstable thumb metacarpophalangeal (MCP) ulnar collateral ligament (UCL) injuries or Stener lesions. We characterize a radiographic sign for this purpose. The "displaced fleck sign" is a small avulsion fracture from the ulnar proximal phalanx base that is displaced proximal to the MCP joint line.
View Article and Find Full Text PDFAnn Emerg Med
January 2025
Department of Emergency Medicine, Medical University of Vienna, Vienna, Austria. Electronic address:
Study Objective: Extracorporeal cardiopulmonary resuscitation (eCPR) is a rescue therapy for selected patients when conventional cardiopulmonary resuscitation (CPR) fails. Current evidence suggests that the success of eCPR depends on well-structured in- and out-of-hospital protocols. This article describes the Vienna eCPR program, and the interventions implemented to improve clinical processes and patient outcomes.
View Article and Find Full Text PDFChemphyschem
January 2025
The University of Sheffield, school of mathematical and physical sciences, UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND.
Pentalene (C8H6) and NN- and BB-bridged heterocyclic analogues (BN)4H6, derived by replacement of CC pairs with BN, are taken as paradigms for tuning of ring-current (anti)aromaticity by variation of π charge, electronegativity and substitution pattern. Ab initio calculation of maps for the π current density induced in these model systems by a perpendicular external magnetic field exhibits the full range of tropicity, from diatropic aromatic to nonaromatic to paratropic antiaromatic, with a ready rationalisation in terms of an orbital model. Further calculations on systems of varying charge in which these motifs are embedded in extended PAH systems with naphthalene and phenanthrene 'clamps' show promise for switching between current patterns and related opto-electronic properties.
View Article and Find Full Text PDFChemphyschem
January 2025
Institute of Molecular Science Marseille, Département de chimie, FRANCE.
Electron delocalization is studied in the ground singlet and first excited triplet states of azulene-containing helicenes. After showing that the compounds we study can be synthesized, we show that they exhibit a charge separation in the ground state, which does not appear in their triplet excited state. Then, magnetically induced properties (IMS3D and ACID) and electron density decomposition methods (EDDB) are used to rationalize aromaticity in these systems.
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