Researchers at the University of Vienna have designed a 3D magnetic nanonetwork, where magnetic monopoles emerge due to rising magnetic frustration among the nanoelements, and are stable at room temperature.
The new three dimensional (3D) nano-network could mean a new era in modern solid state physics, with numerous applications in photonics, bio-medicine, and spintronics. The realization of 3D magnetic nano-architectures could enable ultra-fast and low-energy data storage devices.
Researchers from Berkeley Lab, UC Berkeley, UC Riverside, Argonne National Laboratory, Nanjing University and the University of Electronic Science and Technology of China, have developed an ultrathin magnet that operates at room temperature. This development could lead to new applications in computing and electronics - such as high-density, compact spintronic memory devices - and new tools for the study of quantum physics.
"We're the first to make a room-temperature 2D magnet that is chemically stable under ambient conditions," said senior author Jie Yao, a faculty scientist in Berkeley Lab's Materials Sciences Division and associate professor of materials science and engineering at UC Berkeley. "This discovery is exciting because it not only makes 2D magnetism possible at room temperature, but it also uncovers a new mechanism to realize 2D magnetic materials," added Rui Chen, a UC Berkeley graduate student in the Yao Research Group and lead author on the study.
Researchers from the RIKEN Center for Emergent Matter Science, together with their colleagues, have shown the conversion of a spin current into a rotating charge current vortex using numerical simulations.
This new approach can contribute to the emergence of energy efficient spintronic devices, as it helps to convert between electrical current vortices and a spin current and vice versa. The team came up with the idea of exploiting the Rashba effect – an unusual phenomenon that was discovered in 1959. It occurs on some surfaces or interfaces between two materials where the atomic structure is no longer symmetrical. The Rashba effect causes the spin and the orbital motion of an electron to interact.
Scientists have shown evidence of local symmetry breaking in a quantum material upon heating. They believe these local states are associated with electronic orbitals that serve as orbital degeneracy lifting (ODL) "precursors" to the titanium (Ti) dimers (two molecules linked together) formed when the material is cooled to low temperature. Understanding the role of these ODL precursors may offer scientists a path toward designing materials with the desired technologically relevant properties, which typically emerge at low temperatures.
“Not surprisingly, this low-temperature regime is well studied,” said Emil Bozin, a physicist in the X-ray Scattering Group of the Condensed Matter Physics and Materials Science (CMPMS) Division at the U.S. Department of Energy’s (DOE) Brookhaven National Laboratory. “Meanwhile, the high-temperature regime remains largely unexplored because it’s associated with relatively high symmetry, which is considered uninteresting.”
An international collaboration led by RMIT has achieved record-high electron doping in a layered ferromagnet, causing magnetic phase transition with significant promise for future electronics.
Control of magnetism (or spin directions) by electric voltage is vital for developing future, low-energy high-speed nano-electronic and spintronic devices, such as spin-orbit torque devices and spin field-effect transistors. Ultra-high-charge, doping-induced magnetic phase transition in a layered ferromagnet allows promising applications in antiferromagnetic spintronic devices.
A team of scientists from NUST MISIS and MIPT have developed a new platform for realization of ultra-strong photon-to-magnon coupling. The proposed system is on-chip and is based on thin-film hetero-structures with superconducting, ferromagnetic and insulating layers.
This achievement addresses a problem that has been on the agenda of research teams for the last 10 years, and opens new opportunities in implementing quantum technologies.
A China-Australia collaboration has, for the first time, illustrated that Dzyaloshinskii-Moriya interactions (DMI), an antisymmetric exchange vital for forming various chiral spin textures such as skyrmions, can be induced in a layered material tantalum-sulfide (TaS2) by intercalating iron atoms, and can further be tuned by gate-induced proton intercalation.
Magnetic-spin interactions that allow spin-manipulation by electrical control allow potential applications in energy-efficient spintronic devices.