Magnetic Field Detected Economically by Diamond Dust


Researchers developed a device, with nitrogen-infused diamonds called as multiferroic, which provides efficient detection of magnetic fields.

Engineers at the University of California, Berkeley, created a magnetic sensor that helps in reducing energy required to power magnetic field detectors. This discovery is set to revolutionize science and the industry, which rely on magnetic field and its mechanism.

The existing magnetic sensors are expensive, bulky in size, and they operate at extreme temperature. However, the new sensor created by the researchers are made from nitrogen-infused diamonds, which are cost effective and energy efficient machines. They could replace the bulky sensors in many applications.

The researchers excited diamond dust by a new mechanism with microwaves using thousand times less power, making it feasible to create magnetic-sensing devices, which could get attach in the cell phones. The new device was reported in the journal Science Advances on September 7, 2018. The project was a part of collaboration between University of California and Ohio State University.

To detect magnetic fields, a jet of nitrogen gas is pushed to replace highly ordered carbon atoms with nitrogen atoms, creating nitrogen interlopers, which are hit with high-powered microwave radiation. These nitrogen interlopers are then illuminated by laser, which is absorbed and emitted by the nitrogen atoms.

The new device was embedded with diamond nanocrystals, which had thousands of nitrogen interlopers centers placed in a film, called multiferroic. The material thus developed helps in transferring microwave energy to the crystals much more efficiently. According to the researchers, with this technology they were able to consume less power than previously used machines.

The team is hoping their new device would help in exploring a wide variety of applications such as aircraft, medical devices, navigation, electronic communication, and other sectors dealing with magnetic field.




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