As the demand grows for ever smaller, smarter electronics, so does the demand for understanding materials’ behavior at ever smaller scales. Physicists at the U.S. Department of Energy’s Ames Laboratory are building a unique optical magnetometer to probe magnetism at the nano- and mesoscale.
Researchers at the University of Illinois at Urbana-Champaign have reported physical mechanisms that use heat to manipulate magnetic information. Unlike the conventional methods that involve application of magnetic fields, these mechanisms are based on the transport of heat energy, providing a suitable way to control magnetization at nano-level.
Aalto University Researchers have discovered a breakthrough method of arranging magnetic materials into arrays of nanoscale dots that modify light polarization strongly and controllably upon reflection of the beam from the array.
With some ingenuity and interdisciplinary help, Nick Kaplinsky’s pipe dream became a reality.
For the first time, nanomagnet islands or arrays were arranged into an exotic structure (called “shakti”) that does not directly relate to any known natural material. The shakti artificial spin ice configuration was fabricated and reproduced experimentally.
By combining, in a liposome, magnetic nanoparticles and photosensitizers that are simultaneously and remotely activated by external physical stimuli (a magnetic field and light), scientists at the Laboratoire Matière et Systèmes Complexes (CNRS/Université Paris Diderot) and the Laboratoire Physicochimie des Electrolytes et Nanosystèmes Interfaciaux (CNRS/UPMC), obtained total tumor regression in mice.
Magnetic nanoparticles can open the blood-brain barrier and deliver molecules directly to the brain, say researchers from the University of Montreal, Polytechnique Montréal, and CHU Sainte-Justine.
In the eyes of physicists, magnetic molecules can be considered as nanoscale magnets. Remotely controlling the direction in which they rotate, like spinning tops, may intuitively be difficult to achieve. However, Russian physicists have just demonstrated that it is theoretically possible to do so. They have shown that a change of direction in the circular polarisation of an external magnetic field leads to a change in the direction of the mechanical rotation of the molecule.
MIT researchers have created a technique to stimulate brain tissue using injected magnetic nanoparticles and external magnetic fields.
Measuring faint magnetic fields is a trillion-dollar business. Gigabytes of data, stored and quickly retrieved from chips the size of a coin, are at the heart of consumer electronics. Even higher data densities can be achieved by enhancing magnetic detection sensitivity---perhaps down to nano-tesla levels.