A5048757314- Advanced Memory and Neural Computing
- Organic Light-Emitting Diodes Research
- Magnetic and transport properties of perovskites and related materials
- Electronic and Structural Properties of Oxides
- Quantum and electron transport phenomena
- Magnetic properties of thin films
- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Semiconductor materials and devices
- Molecular Junctions and Nanostructures
- Perovskite Materials and Applications
- Physics of Superconductivity and Magnetism
- Bone Tissue Engineering Materials
- Magnetism in coordination complexes
- Magnetic Properties and Synthesis of Ferrites
- Characterization and Applications of Magnetic Nanoparticles
- Micro and Nano Robotics
- Advanced Condensed Matter Physics
- Rare-earth and actinide compounds
- Ferroelectric and Negative Capacitance Devices
- Quantum-Dot Cellular Automata
- Electrospun Nanofibers in Biomedical Applications
- Theoretical and Computational Physics
- Gas Sensing Nanomaterials and Sensors
- Surface and Thin Film Phenomena
Institute of Nanostructured Materials
2014-2024
Institute of Structure of Matter
2013-2024
Institute for Microelectronics and Microsystems
2024
National Research Council
2019
Istituto Oncologico Romagnolo
2014
University of Bristol
2014
Google (United States)
2011
We report on efficient spin polarized injection and transport in long $({10}^{2}\text{ }\text{nm})$ channels of ${\text{Alq}}_{3}$ organic semiconductor. employ vertical valve devices with a direct interface between the bottom manganite electrode ${\text{Alq}}_{3}$, while top-electrode geometry consists an insulating tunnel barrier placed ``soft'' semiconductor top Co electrode. This solution reduces ubiquitous problem so-called ill-defined layer caused by metal penetration, which extends...
A multifunctional organic spintronic device is demonstrated using tris(8-hydroxyquinolinato)aluminium (Alq3)-based vertical spin valves with manganite and cobalt electrodes. The shows a non-volatile electrical switching dramatic effects on the transport behavior. interplay of magnetic bistabilities enables control valve magnetoresistance. This multifunctionality illustrated together phenomenological model that establishes connection between bistabilities.
Memristors are one of the most promising candidates for future information and communications technology (ICT) architectures. Two experimental proofs concept presented based on intermixing spintronic memristive effects into a single device, magnetically enhanced memristor (MEM). By exploiting interaction between memristance giant magnetoresistance (GMR), universal implication (IMP) logic gate MEM device is realized.
The merging of spintronics with organic RAM technology is demonstrated experimentally for the first time multipurpose device reported here. An unconventional configuration sandwiching a π-conjugated semiconductor between two ferromagnetic electrodes (see figure) allows different, unrelated physical effects to be superimposed. novel single-cell shows both magnetoresistance and nonvolatile electric memory.
A nanomemristor based on SiO(2) is fabricated in situ with spatial control at the nanoscale. The proposed system exhibits peculiar properties such as possibility to be regenerated after being stressed or damaged and expose metal oxide interfaces by removing top electrodes.
The quest for a spin-polarized organic light-emitting diode (spin-OLED) is common goal in the emerging fields of molecular electronics and spintronics. In this device, two ferromagnetic (FM) electrodes are used to enhance electroluminescence intensity OLED through magnetic control spin polarization injected carriers. major difficulty that driving voltage an device exceeds few volts, while injection materials only efficient at low voltages. fabrication spin-OLED uses conjugated polymer as...
Organic semiconductors are emerging materials in the field of spintronics. Successful achievements include their use as a tunnel barrier magnetoresistive tunnelling devices and medium for spin-polarized current transport devices. In this paper, we give an overview basic concepts spin organic present results obtained field, highlighting open questions that have to be addressed order improve performance reproducibility. The most challenging perspectives will discussed possible evolution...
A versatile approach for the design and fabrication of multilayer magnetic scaffolds with tunable gradients is described. Multilayer gelatin membrane intrinsic were designed to encapsulate magnetized bioagents under an externally applied field use in magnetic-field-assisted tissue engineering. The temperature individual membranes increased up 43.7 °C oscillating 70 s by hyperthermia, enabling possibility inducing a thermal gradient inside final 3D scaffolds. On basis finite element method...
We investigate spin precession (Hanle effect) in the prototypical organic spintronic giant magnetoresistance (GMR) device La0.7Sr0.3MnO3(LSMO)/tris(8-hydroxyquinoline)(Alq3)/AlOx/Co. The Hanle effect is not observed measurements taken by sweeping a magnetic field at different angles from plane of device. As possible explanations we discuss tilting out magnetization electrodes, exceptionally high mobility or hot spots. Our results call for greater understanding injection and transport such devices.
We propose a model for the consistent interpretation of transport behavior manganese perovskites in both metallic and insulating regimes. The concept polarons as charge carriers ferromagnetic phase manganites also solves conflict between models, which usually neglects polaron effects phase, and, on other hand, optical conductivity, angle-resolved spectroscopy, neutron scattering measurements, identify down to 6 K. Transport characterizations epitaxial...
Vertical crossbar devices based on manganite and cobalt injecting electrodes a metal-quinoline molecular transport layer are known to manifest both magnetoresistance (MR) electrical bistability. The two effects strongly interwoven, inspiring new device applications such as control of the MR magnetic modulation To explain functionality, we identify mechanism responsible for switching by associating conductivity impedance behavior with chemical states buried layers obtained in operando...
One promising route toward encoding information is to utilize the two stable electronic states of a spin crossover molecule. Although this property clearly manifested in transport across single molecule junctions, evidence linking charge solid-state device molecular film's state has thus far remained indirect. To establish link, we deploy materials-centric and device-centric operando experiments involving X-ray absorption spectroscopy. We find correlation between temperature dependencies...
The understanding of magnetoresistance (MR) in organic spin valves (OSVs) based on molecular semiconductors is still incomplete after its demonstration more than a decade ago. While carrier concentration may play an essential role transport these devices, direct experimental evidence importance lacking. We probed the charge by studying interplay between MR and multilevel resistive switching OSVs. present work demonstrates that all salient features particularly intimate correlation...
Abstract The development of neuromorphic devices is a pivotal step in the pursuit low‐power artificial intelligence. A synaptic analog one building blocks this vision. behavior molecular La 0.7 Sr 0.3 MnO 3 /tris(8‐hydroxyquinolinato)gallium/AlOx/Co spintronic studied, where conductance plays role weight. These are arranged crossbar configuration, most effective architecture for purpose. each cross point controlled separately by application voltage pulses: when set high potentiated state,...
<title>Abstract</title> We demonstrate that, upon the chemisorption of organic molecules, Co thin films display a novel magnetic phase that we tentatively call Ferromagnetic Glass State. This is characterised by giant hardening and violation Rayleigh law for magnetization reversal. Such new originates from modification surface anisotropy induced molecule/film interaction, whose result to produce correlated random field. The ferromagnetic glass state then emerges when correlation length field...
We introduce a Faraday magnetometer based on an analytical balance in which we were able to apply magnetic fields up 0.14 T. calibrated it with 1 mm Ni sphere previously characterized superconducting quantum interference device (SQUID) magnetometer. The proposed reached theoretical sensitivity of 3 × 10−8 A m2. demonstrated its operation composite scaffolds made poly(ε-caprolactone)/iron-doped hydroxyapatite. To confirm the validity method, measured same scaffold properties SQUID agreement...