Concept for a new storage medium

EurekAlert  February 22, 2021 The control and understanding of antiferromagnetic domain walls are key ingredients for advancing antiferromagnetic spintronic technologies. However, studies of the intrinsic mechanics of individual antiferromagnetic domain walls are difficult because they require sufficiently pure materials and suitable experimental approaches to address domain walls on the nanoscale. An international team of researchers (Switzerland, Germany, Ukraine) nucleated isolated 180° domain walls in a single crystal of Cr2O3, a prototypical collinear magnetoelectric antiferromagnet. They studied their interaction with topographic features fabricated on the sample. They demonstrated domain wall manipulation through the resulting engineered energy landscape and showed that the […]

Storing information with light

Phys.org  January 20, 2021 In the quest for energy efficient and fast memory elements, optically controlled ferroelectric memories are promising candidates. By taking advantage of the imprint electric field existing in the nanometric BaTiO3 films and their photovoltaic response at visible light, researchers in Spain have shown that the polarization of suitably written domains can be reversed under illumination. They used this effect to trigger and measure the associate change of resistance in tunnel devices. They showed that engineering the device structure by inserting an auxiliary dielectric layer, the electroresistance increases by a factor near 2 × 103%, and a robust electric […]

Using electricity to increase the amount of data that can be stored by DNA

Phys.org  January 12, 2021 Researchers at Columbia University have developed a new electrogenetic framework for direct storage of digital data in living cells. Using an engineered redox-responsive CRISPR adaptation system, they encoded binary data in 3-bit units into CRISPR arrays of bacterial cells by electrical stimulation. They demonstrated multiplex data encoding into barcoded cell populations to yield meaningful information storage and capacity up to 72 bits, which can be maintained over many generations in natural open environments. Their work establishes a direct digital-to-biological data storage framework and advances the capacity for information exchange between silicon- and carbon-based entities…read more. TECHNICAL ARTICLE 

Bacterial nanopores open the future of data storage

Nanowerk  December 14, 2020 The recent development of polymers that can store information at the molecular level has opened new opportunities for ultrahigh density data storage, long-term archival, anticounterfeiting systems, and molecular cryptography. However, synthetic informational polymers are so far only deciphered by tandem mass spectrometry. In comparison, nanopore technology can be faster, cheaper, nondestructive and provide detection at the single-molecule level; moreover, it can be massively parallelized and miniaturized in portable devices. An international team of researchers (Switzerland, France, Brazil) has demonstrated the ability of engineered aerolysin nanopores to accurately read, with single-bit resolution, the digital information encoded in […]

New shortcut enables faster creation of spin pattern in magnet

Nanowerk  October 5, 2020 The fast creation of topological phases in matter requires massive reorientation of charge or spin degrees of freedom. An international team of researchers (Germany, Belgium, USA – MIT, Italy, the Netherlands) report the picosecond emergence of an extended topological phase that comprises many magnetic skyrmions. The nucleation of this phase, followed in real time via single-shot soft X-ray scattering after infrared laser excitation, is mediated by a transient topological fluctuation state. This state is enabled by the presence of a time-reversal symmetry-breaking perpendicular magnetic field and exists for less than 300 ps. Atomistic simulations indicate that the […]

Memory in a metal, enabled by quantum geometry

Phys.org  September 1, 2020 Previous research had shown that when tungsten ditelluride is in a topological state, the special arrangement of atoms in its layers can produce Weyl nodes which will exhibit unique electronic properties, such as zero resistance conduction. An international team of researchers (USA – UC Berkeley, Stanford University, Lawrence Berkeley National Laboratory, Texas A&M, South Korea) made odd numbered layers slide relative to even-number layers in tungsten ditelluride. The arrangement of these atomic layers represents 0 and 1 for data storage. They made use of Berry curvature to read information out. This material platform works ideally for […]

Researchers manipulate two bits in one atom

Phys.org  September 1, 2020 An international team of researchers (the Netherlands, Chile, Spain) has shown that it is possible to gain independent access to both the spin and orbital degrees of freedom of a single atom, inciting and probing excitations of each moment. By coordinating a single Fe atom atop the nitrogen site of the Cu2N lattice, they created a single-atom system with a large zero-field splitting and an unquenched uniaxial orbital moment that closely approaches the free-atom value. They demonstrated a full reversal of the orbital moment through a single-electron tunneling event between the tip and Fe atom, a […]

New technique may enable all-optical data-center networks

EurekAlert  June 22, 2020 The rapid growth in the amount of data being transferred within data centres creates challenges for the future scalability of electronically switched data-centre networks. As an alternative photonic integration platforms have been demonstrated with nanosecond-scale optical switching times. However, switching times are limited by the clock and data recovery time. Researchers in the UK have shown that using the measurement and storage of clock phase values in a synchronized network, the data recovery times can be under 625 ps. Their approach uses the measurement and storage of clock phase values in a synchronized network to simplify clock […]

Combining magnetic data storage and logic

Phys.org  June 16, 2020 Researchers in Switzerland built racetrack memory managed to perform logical operations directly within memory element. The racetrack memory elements work by using current pulses to move tiny magnetic domains up and down nanowires that are just a few hundred nanometres thick. In these domains, all the magnetic moments are oriented in the same direction and can thus be used to represent the binary states 0 and 1. They use an electric current to reverse the polarity of the magnetic regions, thereby performing a NOT operation on the stored data. By eliminating the need for the mechanical […]

Lasers Write Data Into Glass

IEEE Spectrum  May 29, 2020 Optical data storage was demonstrated in 2013 by researchers in UK. Under Project Silica, last November Microsoft completed its first proof of concept by writing the 1978 film Superman on a single small piece of glass and retrieving it. Researchers could theoretically store up to 360 terabytes of data on a disc the size of a DVD. The laser’s pulse deforms the glass at its focal point, forming a tiny 3D structure called a voxel makes it possible to represent several bits of data per voxel. Reading data from the glass requires an entirely different […]