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Metastable body-centered cubic CoMnFe alloy films with perpendicular magnetic anisotropy for spintronics memory.
Sci Technol Adv Mater
November 2024
WPI Advanced Institute for Materials Research, Tohoku University, Sendai, Japan.
A body-centered cubic (bcc) FeCo(B) is a current standard magnetic material for perpendicular magnetic tunnel junctions (-MTJs) showing both large tunnel magnetoresistance (TMR) and high interfacial perpendicular magnetic anisotropy (PMA) when MgO is utilized as a barrier material of -MTJs. Since the -MTJ is a key device of current spintronics memory, . spin-transfer-torque magnetoresistive random access memory (STT-MRAM), it attracts attention for further advance to explore new magnetic materials showing both large PMA and TMR.
View Article and Find Full Text PDFSpintronic Pathways in a Nonconjugated Radical Polymer Glass.
Adv Mater
January 2025
Charles D. Davidson School of Chemical Engineering, Purdue University, 480 W. Stadium Ave, West Lafayette, IN, 47907, USA.
Radical chemistries have attracted burgeoning attention due to their intriguing technological applications in organic electronics, optoelectronics, and magneto-responsive systems. However, the potential of these magnetically active glassy polymers to transport spin-selective currents has not been demonstrated. Here, the spin-transport characteristics of the radical polymer poly(4-glycidyloxy-2,2,6,6-tetramethylpiperidine-1-oxyl) (PTEO) allow for sustained spin-selective currents when incorporated into typical device geometries with magnetically polarized electrodes.
View Article and Find Full Text PDF2D versus 3D-Like Electrical Behavior of MXene Thin Films: Insights from Weak Localization in the Role of Thickness, Interflake Coupling and Defects.
Small
January 2025
Institut Pprime, Université de Poitiers, CNRS, ISAE-ENSMA, 11 Bd M. P. Curie, Chasseneuil-du-Poitou, 86360, France.
MXenes stand out from other 2D materials because they combine very good electrical conductivity with hydrophilicity, allowing cost-effective processing as thin films. Therefore, there is a high fundamental interest in unraveling the electronic transport mechanisms at stake in multilayers of the most conducting MXene, TiCT. Although weak localization (WL) has been proposed as the dominating low-temperature (LT) transport mechanism in TiCT thin films, there have been few attempts to model it quantitatively.
View Article and Find Full Text PDFA Flexible Organomagnetic Single-Layer Composite Film with Built-In Multistimuli Responsivity.
ACS Appl Mater Interfaces
November 2024
School of Chemistry, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel.
Materials possessing multiple properties and functionalities, that can be controlled or modulated by external stimuli, are a central focus of current research in materials sciences due to their potential to significantly enhance various future technological applications. Herein, we report a significant advancement in this field through the development of a smart, multifunctional organomagnetic composite material. By utilizing a thin layer of polydimethylsiloxane (PDMS) and polypyrrole (PPy) precursors, doped with nickel nanoparticles (NiNPs), we have created an innovative organomagnetic, PDMS/PPy/NiNPs (PPN), single-layer composite film that displays multistimuli responsivity.
View Article and Find Full Text PDFA robust deep learning attack immune MRAM-based physical unclonable function.
Sci Rep
September 2024
Institut Interdisciplinaire d'Innovation Technologique (3IT), Université de Sherbrooke, Sherbrooke, QC, Canada.
The ubiquitous presence of electronic devices demands robust hardware security mechanisms to safeguard sensitive information from threats. This paper presents a physical unclonable function (PUF) circuit based on magnetoresistive random access memory (MRAM). The circuit utilizes inherent characteristics arising from fabrication variations, specifically magnetic tunnel junction (MTJ) cell resistance, to produce corresponding outputs for applied challenges.
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