Phys.org June 11, 2024 Metal phthalocyanines are topical objects of ongoing research and particularly interesting due to their magnetic properties. However, while the current focus lies almost exclusively on spin-Zeeman-related effects, the high symmetry of the molecule and its circular shape suggests the exploitation of light-induced excitation of 2-fold degenerate vibrational states in order to generate, switch, and manipulate magnetic fields at the nanoscale. The underlying mechanism is a molecular pseudorotation that can be triggered by infrared pulses and gives rise to a quantized, small, but controllable magnetic dipole moment. Researchers in Austria investigated the optical stimulation of vibrationally induced […]
Tag Archives: Nanomagnets
Printing circuits on rare nanomagnets puts a new spin on computing
Phys.org March 28, 2022 An international team of researchers (USA – Argonne National Laboratory, Lawrence Livermore National Laboratory, Switzerland, the Netherlands, Finland) combined theoretical and experimental work to fabricate and observe the artificial spin glass as a proof-of-principle. Hopfield neural network mathematically models associative memory to guide the disorder of the artificial spin systems. They performed temperature-dependent imaging of thermally driven moment fluctuations within these networks and observed characteristic features of a two-dimensional Ising spin glass. They observed clear signatures of the hard-to-observe rugged spin glass free energy in the form of sub-aging, out-of-equilibrium autocorrelations and a transition from stable […]