All articles tagged with #ferromagnetism
Researchers demonstrate both optical training and direct optical switching of ferromagnetic polarization in twisted MoTe2 bilayers, enabling on-demand control of integer and fractional Chern insulator states via circularly polarized light and the writing of topological domains with potential for topological spintronics and quantum memories.
Scientists have demonstrated field-induced superconductivity in quantum materials by applying stress as a switch between a field tunable superconducting state and a non-field tunable state. The team used X-ray diffraction and spectroscopy measurements under stress to propose a new mechanism called the dipolar fold as the origin of field-induced superconductivity. The study provides insights into the tunability of superconductivity through strain and magnetic field, opening up possibilities for applications in superconducting spintronics.
Scientists at ETH Zurich have discovered a new type of magnetism in a custom-engineered moiré material. Unlike traditional ferromagnetism, this magnetism arises from the alignment of electron spins to minimize kinetic energy rather than the exchange interaction. The researchers filled the material with electrons and observed that it exhibited ferromagnetic behavior when there was more than one electron per lattice site. This phenomenon, known as kinetic magnetism, had previously only been observed in model systems and not in extended solid-state systems. Further research will explore the preservation of ferromagnetism at higher temperatures.
Researchers at North Carolina State University have discovered a new form of silicon called Q-silicon, which exhibits ferromagnetism at room temperature. This discovery could have significant implications for quantum computing, particularly in the development of spin qubit quantum computers that rely on controlling the spin of electrons. Q-silicon also offers enhanced hardness and superconductivity, making it an ideal platform for integrating spintronics with microelectronics on a chip.
Researchers have used terahertz light pulses to induce ferromagnetism in a crystal at temperatures far above its normal transition temperature, paving the way for optically controlled memory and computing devices with higher speed and efficiency. Using pulses just hundreds of femtoseconds long, a ferromagnetic state was induced at high temperature in the rare-earth titanate YTiO3 which persisted for many nanoseconds after the light exposure. The intense light pulse is designed to ‘shake’ the material’s atoms in a coordinated way, allowing the electrons to align their spins.