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A Triangular Frustrated Eu(II)-Organic Framework for Sub-Kelvin Magnetic Refrigeration.
J Am Chem Soc
January 2025
Department of Chemistry, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark.
Attaining sub-Kelvin temperatures remains technologically challenging and often relies on the scarce resource He, unless employing adiabatic demagnetization refrigeration. Herein, the active coolant typically consists of weakly coupled paramagnetic ions, whose magnetic interaction strengths are comparable in energy to the relevant temperature regime of cooling. Such interactions depend strongly on inter-ion distances, fundamentally hindering the realization of dense coolants for sub-Kelvin refrigeration.
View Article and Find Full Text PDFReview of honeycomb-based Kitaev materials with zigzag magnetic ordering.
Acta Crystallogr B Struct Sci Cryst Eng Mater
February 2025
Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
The search for a Kitaev quantum spin liquid in crystalline magnetic materials has fueled intense interest in the two-dimensional honeycomb systems. Many promising candidate Kitaev systems are characterized by a long-range-ordered magnetic structure with an antiferromagnetic zigzag-type order, where the static moments form alternating ferromagnetic chains. Recent experiments on high-quality single crystals uncovered the existence of intriguing multi-k magnetic structures, which evolved from zigzag structures.
View Article and Find Full Text PDFNeural Variability and Cognitive Control in Individuals With Opioid Use Disorder.
JAMA Netw Open
January 2025
Interdepartmental Neuroscience Program, Yale University, New Haven, Connecticut.
Importance: Opioid use disorder (OUD) impacts millions of people worldwide. Prior studies investigating its underpinning neural mechanisms have not often considered how brain signals evolve over time, so it remains unclear whether brain dynamics are altered in OUD and have subsequent behavioral implications.
Objective: To characterize brain dynamic alterations and their association with cognitive control in individuals with OUD.
High Néel temperature and magnetism modulation in 2D pentagon-based XN (X = B, Al, and Ga) structures with spin-polarized non-metallic atoms.
Phys Chem Chem Phys
January 2025
College of Physics, Sichuan University, Chengdu, 610065, China.
Magnetic semiconductors with spin-polarized non-metallic atoms are usually overlooked in applications because of their poor performances in magnetic moments and under critical temperatures. Herein, magnetic characteristics of 2D pentagon-based XN (X = B, Al, and Ga) are revealed based on first-principles calculations. It was proven that XN structures are antiferromagnetic semiconductors with bandgaps of 2.
View Article and Find Full Text PDFUnveiling the multifaceted bioactivity of copper(II)-Schiff base complexes: a comprehensive study of antioxidant, anti-bacterial, anti-inflammatory, enzyme inhibition and cytotoxic potentials with DFT insights.
Dalton Trans
January 2025
Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 22, Kerala, India.
The rise of various diseases demands the development of new agents with antioxidant, antimicrobial, anti-inflammatory, enzyme-inhibiting, and cytotoxic properties. In this study, heterocyclic Schiff base complexes of Cu(II) featuring a benzo[]thiophene moiety were synthesized and their biological activities evaluated. The complexes were characterized using FT-IR, UV-Vis, and EPR spectroscopy, TG-DTG analysis, magnetic moment measurements, molar conductivity measurements, and elemental analyses.
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