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Spin Glass State and Griffiths Phase in van der Waals Ferromagnetic Material FeGeTe.
Nanomaterials (Basel)
December 2024
School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China.
The discovery of two-dimensional (2D) van der Waals ferromagnetic materials opens up new avenues for making devices with high information storage density, ultra-fast response, high integration, and low power consumption. FeGeTe has attracted much attention because of its ferromagnetic transition temperature near room temperature. However, the investigation of its phase transition is rare until now.
View Article and Find Full Text PDFGuanine-based spin valve with spin rectification effect for an artificial memory element.
Heliyon
January 2025
National Institute of Materials Physics, 077125 Magurele, Ilfov, Romania.
Non-volatile electronic memory elements are very attractive for applications, not only for information storage but also in logic circuits, sensing devices and neuromorphic computing. Here, a ferroelectric film of guanine nucleobase is used in a resistive memory junction sandwiched between two different ferromagnetic films of Co and CoCr alloys. The magnetic films have an in-plane easy axis of magnetization and different coercive fields whereas the guanine film ensures a very long spin transport length, at 100 K.
View Article and Find Full Text PDFHigh-temperature field-free superconducting diode effect in high-T cuprates.
Nat Commun
January 2025
International Center for Quantum Materials, School of Physics, Peking University, Beijing, China.
The superconducting diode effect (SDE) is defined by the difference in the magnitude of critical currents applied in opposite directions. It has been observed in various superconducting systems and attracted high research interests. However, the operating temperature of the SDE is typically low and/or the sample structure is rather complex.
View Article and Find Full Text PDFImproved detection of cerebral microbleeds in Alzheimer’s Disease using 7T susceptibility weighted imaging.
Alzheimers Dement
December 2024
Urmia University of Medical Science, Urmia, West Azarbayjan, Iran (Islamic Republic of)
Background: Cerebral microbleeds (CMBs) are small, round aggregations of hemosiderin‐laden macrophages that indicate leakage of blood products from cerebral vessels damaged by β‐amyloid‐40 (Aβ), which is the basis of cerebral amyloid angiopathy (CAA). Pathology studies have demonstrated a high correlation between CAA and AD, both amyloid‐related pathologies. CMBs can be visualized commonly using T2*‐weighted MRI, as small foci of decreased signal intensity.
View Article and Find Full Text PDFBackground: Recent evidence suggests extensive myelin dysfunction in Alzheimer’s Disease (AD), lending to investigation of biomarkers previously implicated in both AD and Multiple Sclerosis (MS) to find objective and obtainable diagnostic screening tools. Glial fibrillary acidic protein (GFAP), Chitinase‐3‐like protein 1 (CHI3L1), Chemokine (C‐X‐C motif) ligand 13 (CXCL13), and neurofilament light chain (Nfl) have been known to mark neuronal pathology in both diseases making them attractive markers. Retinal Optical Coherence Tomography (OCT) becomes a popular diagnostic tool in both conditions as an inexpensive and rapid way of obtaining a window into the cerebrum.
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