Current Magnetoresistance News and Events

Current Magnetoresistance News and Events, Magnetoresistance News Articles.
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Fabrication of a single-crystal giant magnetoresistive device on a polycrystalline film
NIMS and AIST have jointly succeeded in fabricating a giant magnetoresistive (GMR) device comprising single-crystal Heusler alloys on an practical silicon substrate. The team demonstrated for the first time that a single-crystal magnetoresistive device can be bonded onto the surface of a polycrystalline electrode using a wafer bonding technique. (2020-08-27)

Van der Waals junction spin valves without spacer layer
Distinct from traditional spin valves with a sandwich structure consisting of two ferromagnetic metals decoupled by the insertion of a non-magnetic spacer, recently, a research team led by Prof. Kaiyou Wang from Institute of Semiconductors, Chinese Academy of Sciences, collaborating with their colleagues, has demonstrated two-state and three-state spin-valve effects using Fe3GeTe2 vdW homo-junctions without any spacer layer. Realization of multi spin states using the vdW interfaces could be important for non-volatile spintronic applications. (2020-05-27)

4D electric circuit network with topology
Researchers from China and Germany have proposed a design scheme to implement a four-dimensional topological insulating state in circuit network, which provides a convenient physical platform for studying high-dimensional states. (2020-05-19)

Toward a more energy-efficient spintronics
In order to generate and detect spin currents, spintronics traditionally uses ferromagnetic materials whose magnetization switching consume high amounts of energy. French researchers recently presented an approach that can detect spin information at low power using a non-magnetic system. Their research opens the way towards spintronic devices that operate on ferroelectricity rather than on ferromagnetism, thereby consuming 1,000 times less energy. (2020-04-22)

A new strategy to create 2D magnetic order
Scientists based in China discover the spin-valve magnetoresistance at the ferromagnetic SrRuO3 grain boundary owing to the nature of non-magnetic metallic grain boundary revealed by electron microscopy and first principles calculations, providing a new strategy to create the low-dimensional magnetic order via defect engineering. (2020-04-10)

Symmetry-enforced three-dimension Dirac phononic crystals
Dirac semimetals are critical states of topologically distinct phases. Such gapless topological states have been accomplished by a band-inversion mechanism, in which the Dirac points can be annihilated pairwise by perturbations without changing the symmetry of the system. Here, Scientists in China report an experimental observation of Dirac points that are enforced completely by the crystal symmetry using a nonsymmorphic phononic crystal. Novel topological surface states are demonstrated in their experiments. (2020-03-19)

Ultrafast probing reveals intricate dynamics of quantum coherence
Ultrafast, multidimensional spectroscopy unlocks macroscopic-scale effects of quantum electronic correlations. Researchers found that low-energy and high energy states are correlated in a layered, superconducting material. Exciting the material with an ultrafast beam of near-infrared light produces coherent excitations lasting a surprisingly 'long' time of around 500 femtoseconds, originating from a quantum superposition of excited states within the crystal. (2020-02-28)

Studying electrons, bridging two realms of physics: connecting solids and soft matter
Condensed matter physics, which analyzes the behavior of electrons in organized solid matter, has been treated as a completely separate field of study from soft matter physics, which deals with liquids, gels, etc. But in a new study, researchers from Japan have now revealed that under certain special conditions, the electrons in solid matter exhibit similar properties to the constituent particles of soft matter. (2020-02-13)

Inhomogeneous-strain-induced magnetic vortex cluster in one-dimensional manganite wire
Research teams in China in collaboration with German scientists achieved magnetic vortex clusters with flux closure spin configurations in single-crystal La0.67Sr0.33MnO3 (LSMO) wire. A distinctive transformation from out-of-plane domains to a vortex state is directly visualized using magnetic force microscopy at 4 K in wires when the width is reduced down to 500 nm. The phase-field modeling indicates that the inhomogeneous strain, accompanying with shape anisotropy, plays a key role for stabilizing the flux-closure spin structure. (2020-02-07)

Low power metal detector senses magnetic fingerprints
Recent studies have shown metallic objects have their own magnetic fingerprints based on size, shape and physical composition. In AIP Advances, from AIP Publishing, scientists look to leverage these observations to potentially create a smaller and cheaper system that is just as effective as their larger counterparts. (2020-01-21)

What's MER? A new way to measure quantum materials
Experimental physicists have combined several measurements of quantum materials into one in their ongoing quest to learn more about manipulating and controlling the behavior of them for possible applications. They even coined a term for it -- magneto-elastoresistance, or MER. (2020-01-16)

Paving the way for spintronic RAMs: A deeper look into a powerful spin phenomenon
Scientists at Tokyo Institute of Technology explore a new material combination that sets the stage for magnetic random access memories, which rely on spin -- an intrinsic property of electrons -- and could outperform current storage devices. Their breakthrough published in a new study describes a novel strategy to exploit spin-related phenomena in topological materials, which could spur several advances in the field of spin electronics. Moreover, this study provides additional insight into the underlying mechanism of spin-related phenomena. (2019-12-26)

Scientists reveal the dominant role of quenched disorder on complex oxide nanowires
At nanometer length scale, novel phenomena are expected to emerge. Compared to the traditional semiconductors used in industrial business, does complex oxides show any interesting and not-before-seen properties at nanometer length scale? A new study published in SCIENCE CHINA Physics, Mechanics & Astronomy has shown the unique physical properties of manganite nanowires known as quenched disorder and its potential applications. (2019-11-22)

Spinning towards robust microwave generation on the nano scale
Many physicists have attempted to produce reliable macroscale microwave fields by combining nanoscale spin-torque oscillators, but so far without success. Michael Zaks from Humboldt University of Berlin and Arkady Pikovsky from the University of Potsdam in Germany have now theoretically demonstrated why connecting these devices in series is doomed to fail. Their work was recently published in EPJ B. (2019-08-07)

Unlocking magnetic properties for future faster, low-energy spintronics
An Australian collaboration combines theory and experimental expertise, discovering new magnetic properties of two-dimensional Fe3GeTe2 (FGT) towards spintronic applications promising faster, more efficient computing. (2019-07-08)

A peculiar ground-state phase for superconductor NbSe2 -- It's a Bose metal!
The application of large enough magnetic fields results in the disruption of superconducting states in materials even at drastically low temperature, thereby changing them directly into insulators -- or so was traditionally thought. Now, scientists at Tokyo Tech, The University of Tokyo and Tohoku University report curious multi-state transitions of these superconductors: going from superconductor to special metal and then to insulator. (2019-06-27)

Development of durable MTJ under harsh environment for STT-MRAM at 1Xnm technology node
Researchers at Tohoku University have announced the development of a new magnetic tunnel junction, by which the team has demonstrated an extended retention time for digital information without an increase of the active power consumption. (2019-06-14)

Concert of magnetic moments
An international collaboration between researchers from Germany, the Netherlands, and South Korea has uncovered a new way how the electron spins in layered materials can interact. In their publication in the journal Nature Materials, the scientists report a hitherto unknown chiral coupling that is active over relatively long distances. As a consequence, spins in two different magnetic layers that are separated by non-magnetic materials can influence each other even though they are not adjacent. (2019-06-13)

Manipulating electron spin using artificial molecular motors
Artificial molecular switches and machines have undergone rapid advances over the past several decades. Particularly, artificial molecular motors are highly attractive from the viewpoint of chirality switching during rotational steps. Now, researchers fabricated an electron's spin-filtering device that can switch the spin polarization direction by light irradiation or thermal treatment. The present results are beneficial to the development of solid-state functionalities emerging from nanosized motions of molecular switches. (2019-06-07)

Unexpected properties uncovered in recently discovered superconductor
Researchers from Tokyo Metropolitan University have found that crystals of a recently discovered superconducting material, a layered bismuth chalcogenide with a four-fold symmetric structure, shows only two-fold symmetry in its superconductivity. The origin of superconductivity in these structures is not yet well understood; this finding suggests a connection with an enigmatic class of materials known as nematic superconductors and the extraordinary mechanisms by which superconductivity can emerge at easier-to-reach temperatures. (2019-04-13)

Hall effect becomes viscous in graphene
The movement of electron fluid in graphene has, for the first time, been observed to exist with two separate viscosities showing that the Hall effect -- a phenomenon well known for more than a century -- is no longer as universal as it was thought to be. (2019-02-28)

Pressure induced lifshitz transition in the type II Dirac semimetal PtTe2
A recent high pressure study on the type II Dirac Semimetal (DSM) PtTe2 reveals a pressure induced Lifshitz transition in the trivial band structure, while the crystal structure keeps robust under pressure. (2019-01-17)

Magnetoresistance ratio enhancement opens door to highly sensitive magnetic field sensors
Magnetic field sensors can enhance applications that require efficient electric energy management. Improving magnetic field sensors below the picoTesla range could enable a technique to measure brain activity at room temperature with millisecond resolution without superconducting quantum interference device technology, which requires cryogenic temperatures to work. Researchers explored enhancing the magnetoresistance ratio in a CPP-GMR device by using a half-metallic Heusler CoFeAl0.5Si0.5 alloy. They report their findings in the Journal of Applied Physics. (2018-12-20)

Energy-efficient spin current can be controlled by magnetic field and temperature
Up to now, electronic computer components have been run on electricity, generating unwanted heat. If spin current were employed instead, computers and similar devices could be operated in a much more energy-efficient manner. Researchers have now discovered an effect that could make such a transition to spin current a reality. (2018-08-17)

Lining up surprising behaviors of superconductor with one of the world's strongest magnets
Scientists have discovered that the electrical resistance of this material changes in an unusual way under very high magnetic fields -- a finding that could help direct the search for materials that can perfectly conduct electricity at room temperature. (2018-08-08)

Researchers use nanotechnology to improve the accuracy of measuring devices
Scientists from Higher school of economics and the Federal Scientific Research Centre 'Crystallography and Photonics' have synthesized multi-layered nanowires in order to study their magnetoresistance properties. Improving this effect will allow scientists to increase the accuracy of indicators of various measuring instruments, such as compasses and radiation monitors. The results of the study have been published in the paper 'Structure of Cu/Ni Nanowires Obtained by Matrix Synthesis'. (2018-07-24)

Realization of high-performance magnetic sensors due to magnetic vortex structures
Magnetic sensors play a key role in a variety of applications, such as speed and position sensing in the automotive industry or in biomedical applications. Within the framework of the Christian Doppler Laboratory 'Advanced Magnetic Sensing and Materials' headed by Dieter Süss novel magnetic sensors have been realized that surpass conventional technologies in performance and accuracy in a cooperation between the University of Vienna, the Danube University Krems and Infineon AG. (2018-06-14)

Antiferromagnets prove their potential for spin-based information technology
As published in the online science journal Nature Communications, scientists at the Institute of Phyics at Johannes Gutenberg University Mainz (JGU) were now able to demonstrate current-induced switching of the Néel vector also for metallic thin films of a compound consisting of manganese and gold, Mn2Au, which orders antiferromagnetically at high temperatures. (2018-01-29)

Yale-NUS undergraduates part of team that finds two theoretical physics models to be equivalent
Two Yale-NUS College undergraduates are part of a research team that concluded that two different mathematical models, which describe the same physical phenomenon, are essentially equivalent. After implementing the two different models of magnetoresistance as computer simulations, Lai Ying Tong, 21, and Silvia Lara, 22, found that the two simulations produced similar results under identical conditions. The research was published in the peer-reviewed journal Physical Review B in December 2017, and presented at international conferences in 2016 and 2017. (2018-01-28)

New metal-semiconductor interface for brain-inspired computing
One of the big challenges in computer architecture is integrating storage, memory and processing in one unit. This would make computers faster and more energy efficient. University of Groningen physicists have taken a big step towards this goal by combining a niobium doped strontium titanate (SrTiO3) semiconductor with ferromagnetic cobalt. At the interface, this creates a spin-memristor with storage abilities, paving the way for neuromorphic computing architectures. The results were published in Scientific Reports. (2018-01-22)

Lobachevsky University researchers obtain magnetic semiconductor layers of a new type
Researchers at the laboratory of spin and optical electronics of the Lobachevsky University (Nizhny Novgorod, Russia) have obtained a new type of magnetic semiconductor layers, which demonstrate spin-dependent phenomena in the transport of charge carriers at room temperature. (2018-01-22)

Charge order and electron localization in a molecule-based solid
Charge ordering in cationic mixed-valence compounds is of crucial importance for materials science. The prototypic example for a transition from a charge-disordered to a charge-ordered state has been magnetite, Fe3O4, where Evert Verwey observed a sudden jump in resistivity near -150°C. In the journal Science Advances now a research team of scientists from Germany and Slovenia reports a Verwey-type charge-ordering transition in a different class of mixed-valence compounds that is composed of negatively charged dioxygen molecules. (2018-01-19)

New discovery could improve brain-like memory and computing
From various magnetic tapes, floppy disks and computer hard disk drives, magnetic materials have been storing our electronic information along with our valuable knowledge and memories for well over half of a century. (2018-01-09)

Mixed valence states in lead perovskites
Scientists at Tokyo Institute of Technology, the Kanagawa Academy of Science and Technology have reported an unusual charge distribution of Pb2+Pb4+3Co2+2Co3+2O12 for a perovskite PbCoO3 synthesized at 12 GPa, with charge orderings in the A and B sites of an ABO3 perovskite. This strategy can possibly lead to the production of next-generation materials with fascinating properties such as superconductivity, colossal magnetoresistance, and high thermopower. (2017-05-09)

Spintronic technology advances with newly designed magnetic tunnel junctions
Magnetic tunnel junctions (MTJs) have played a central role in spintronic devices, and researchers are working to improve their performance. A prominent achievement that accelerated the technology's practical applications was the realization of giant tunnel magnetoresistance (TMR) ratios by using rock-salt type MgO crystalline barrier. In this week's Applied Physics Letters, researchers have succeeded in applying MgGa2O4 to a tunnel barrier, the core part of an MTJ, as an alternative material to more conventional insulators. (2017-03-21)

Single atom memory: The world's smallest storage medium
One bit of digital information can now be successfully stored in an individual atom. This result is a breakthrough in the miniaturization of storage media and has the potential to serve as a basis for quantum computing. (2017-03-09)

Smart multi-layered magnetic material acts as an electric switch
The nanometric-size islands of magnetic metal sporadically spread between vacuum gaps display unique conductive properties under a magnetic field. In a recent study published in EPJ Plus, Anatoliy Chornous from Sumy State University in Ukraine and colleagues found that the vacuum gaps impede the direct magnetic alignment between the adjacent islands -- which depends on the external magnetic field -- while allowing electron tunneling between them. (2017-02-27)

Cerium hexaboride challenges physicists to come up with new theory
Cerium hexaboride is strongly correlated materials. Up to now, many theories have been proposed to explain the anomalous physical properties of cerium hexaboride, but they all proved unable to predict the results of ESR experiments. Improved equipment design led to unexpected experimental findings, which runs contrary to the commonsense expectation and theoretical predictions. Achieved degree of sensitivity and stability will help to perform accurate ESR measurements of strongly correlated metals. (2016-12-21)

R&D collaboration in integrated electronic systems receives top award
Tohoku University's Tetsuo Endoh, Tokyo Electron Limited's Gishi Chung and Keysight Technologies Inc.'s Masaki Yamamoto have been awarded Japan's Prime Minister's Award for Contribution to Industry-Academia-Government Collaboration. (2016-10-18)

Research team led by NUS scientists develop plastic flexible magnetic memory device
Associate Professor Yang Hyunsoo from the National University of Singapore led a research team to successfully embed a powerful magnetic memory chip on a flexible plastic material. This malleable memory chip hails a breakthrough in the flexible electronics revolution, and brings researchers a step closer towards making flexible, wearable electronics a reality in the near future. (2016-07-19)

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