Northeastern University

Parisa Andalib

Vincent G Harris

Yajie Chen

Francesca Scire Scappuzzo

A composite magnetic material has a plurality of grains having a magnetic ferrite phase, grain boundaries surrounding the grains, and a plurality of nanoparticles disposed at the grain boundaries. The nanoparticles of the composite material are both magnetic and electrically insulating, having a magnetic flux density of greater than about 100 mT and an electrical resistivity of at least about 10Ohm-cm. Also provided is a method of making the composite material. The material is useful for making inductor cores of electronic devices.

Magnetic materials with ultrahigh resistivity intergrain nanoparticles

Devices and methods for directing a magnetic field into a body party of a subject are provided. The devices include at least one electromagnetic coil, a magnetic core or yoke, and a pair of flux concentrators. The flux concentrators are separated by a gap into which the body part fits and through which the flux concentrators focus the magnetic field. The devices allow magnetic fields to be transmitted through the gap with higher intensity at greater distances from the device than possible with previous designs. The methods of using such devices allow the delivery of magnetic fields with higher intensity to the interior of a body part without exposing interposed proximal regions to magnetic fields of unduly high intensity. The devices and methods are useful for deep transcranial magnetic stimulation of the brain to treat various medical conditions.

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Malden, MA, United States of America

Parisa Andalib