New microscope technique offers a better way to measure magnetic field of

first_imgA team of researchers at IBM has developed a new way to measure the magnetic field of individual atoms that offers 1000 times the energy resolution of conventional techniques. In their paper published in the journal Nature Nanotechnology, the team describes their approach, how well it works and their hope that they will be able to modify it in such a way as to allow others with less specialized hardware to use it. Explore further Journal information: Nature Nanotechnology Scientists are eager to better measure the magnetic fields of individual atoms because they believe it will lead to a better understanding of material and biological interactions—most particularly those involving weak magnetic interactions. Current methods rely on using defects in diamonds, though the team at IBM notes that prior work at their lab shows that it is possible to measure weak interactions in another way, an approach described as challenging. In this new effort, the team has come up with a way to get the job done that is relatively simple, though, they note, it requires special hardware.In the new approach, an atom called a sensor is placed near a target atom inside of a scanning tunneling microscope—a magnetic field is then applied to the microscope followed by a jolt of electricity to the tunnel junction. From there on, the frequency of the atom is monitored—when it matches the spin of the precess (the axis of rotation around a magnetic field that reflects its degree of magnetism), it reveals the measure of the magnetic field. The change in orientation is measured by moving the sensor atom to the microscope’s sensor tip.The researchers found their approach to be far more accurate and easier to read than other methods, pointing out that the signal they got from the technique was both stronger and more robust. They note also that few other labs likely have the combination of equipment (such as the high frequency cabling added to the microscope) required to replicate their technique, so they plan to continue the work in hopes of achieving the same results under more relaxed conditions. © 2017 Phys.org This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.center_img Credit: CC0 Public Domain Citation: New microscope technique offers a better way to measure magnetic field of individual atoms (2017, March 7) retrieved 18 August 2019 from https://phys.org/news/2017-03-microscope-technique-magnetic-field-individual.html Ultrasensitive magnetometer proposed based on compass needle More information: Taeyoung Choi et al. Atomic-scale sensing of the magnetic dipolar field from single atoms, Nature Nanotechnology (2017). DOI: 10.1038/nnano.2017.18last_img read more

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first_imgGo back to the enewsletterClick the cover to view the brochureAPT has launched its 2019 Outback Wilderness Adventures brochure with a range of early-bird Superdeals including savings of up to $1,200 per couple on selected tours.APT’s 11-day Cooktown & Cape York 4WD adventure showcases the best of Outback Queensland’s remote landscapes, starting from $7,995 per person twin share, which includes a Superdeal saving of $600 per person.Travelling with no more than 20 guests with all meals, sightseeing, national park fees and airport transfers included, clients are sure to be impressed by the all-inclusive value of an APT Outback Wilderness Adventure. What’s more, the two-person crew of an APT expert Driver-Guide and Tour Director will be on hand to make their holiday unforgettable.Thanks to APT’s exclusive range of Signature Experiences, clients will be able to take to the skies as they embark on a scenic helicopter flight over the most northerly point of Australia’s mainland, Cape York; travel the rugged Bloomfield and Old Telegraph tracks; and explore the Steve Irwin Wildlife Reserve, normally off-limits to the general public.With the release of the new brochure comes some amazing early-bird savings thanks to APT’s Superdeals. Book before 15 December 2018 to take advantage of a range of offers including a savings of up to $1,200 per couple on select itineraries and departures.To find out more about APT’s incredible range of Outback Wilderness Adventures, call APT on1300 196 420, visit www.aptouring.com.au or contact your local Business Development Manager.Go back to the enewsletterlast_img read more