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Magnetic monopolies make acoustic debut

  Magnetic monopolies make acoustic debut
Credit: University of Oxford

University College Cork (UCC) and Oxford University Professor of Physics, Séamus Davis, have led a team of experimental physicists in the discovery of the magnetic noise generated by a liquid of magnetic monopolies.

In a world first, the team created a magnetic field noise spectrometer that makes it possible to hear magnetic monopoly noise for human perception.

For the research, published in Nature today, Professor Davis worked as part of an international collaboration with Stephen J Blundell of the University of Oxford, who led the theoretical physicists to develop a new approach to to discover and study "emergent" magnetic monopolies.

At the exciting breakthrough, Professor Davis said: "Researchers will now be able to study new aspects of physics in magnetic monopolies, which are fundamentally important but highly elusive elemental particles, for the first time." Magnetic monopolies are elemental particles exhibiting quantized magnetic charge, with improved prospects of studying them in recent years with the theoretical recognition that the thermally stressed states of certain classes of magnetic insulators exhibit all the characeric terms of magnetic monopolies .

Last year, Blundell and his colleagues, Dr. Franziska Kirschner and Dr. Felix Flicker said that the random movement of magnetic monopolies within these connections would create a certain form of excitation noise. Any crystal of one of these magnetic insulators should spontaneously produce wild and randomly fluctuating magnetic fields. However, the catch was that the size of such fields was predicted to be near a billionth of the Earth's field.

In response to this, Davis and his colleague Dr. Ritica Dusad is an exquisitely sensitive magnetic field noise spectrometer based on a superconducting quantum interference one SQUID. Almost all of the predicted properties of the magnetic noise coming from a dense liquid of magnetic monopoles were then discovered from crystals of Dy 2 Ti 2 7 1

9659005] Extraordinary Because this magnetic monopole noise occurs in the frequency range below 20kHz when amplified by SQUID, it is actually audible to humans.

New result in the search for mysterious magnetic monopolies

More Information:
Magnetic monopoly noise, Nature (2019). DOI: 10.1038 / s41586-019-1358-1, https://nature.com/articles/s41586-019-1358-1

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University of Oxford

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Magnetic monopolies make acoustic debut (2019, July 3)
July 3, 2019
from https://phys.org/news/2019-07-magnetic-monopoles-acoustic-debut.html

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