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Ultrasensitive Inertial and Force Sensors with Diamagnetically Levitated Magnets

J. Prat-Camps ; C. Teo ; C. C. Rusconi ; Witlef Wieczorek (Institutionen för mikroteknologi och nanovetenskap) ; O. Romero-Isart
Physical Review Applied (2331-7019). Vol. 8 (2017), 3, p. art. no 034002.
[Artikel, refereegranskad vetenskaplig]

We theoretically show that a magnet can be stably levitated on top of a punctured superconductor sheet in the Meissner state without applying any external field. The trapping potential created by such induced-only superconducting currents is characterized for magnetic spheres ranging from tens of nanometers to tens of millimeters. Such a diamagnetically levitated magnet is predicted to be extremely well isolated from the environment. We propose to use it as an ultrasensitive force and inertial sensor. A magneto-mechanical readout of its displacement can be performed by using superconducting quantum interference devices. An analysis using current technology shows that force and acceleration sensitivities on the order of 10(-23) N/root Hz (for a 100-nm magnet) and 10(-14) g/root Hz (for a 10-mm magnet) might be within reach in a cryogenic environment. Such remarkable sensitivities, both in force and acceleration, can be used for a variety of purposes, from designing ultrasensitive inertial sensors for technological applications (e.g., gravimetry, avionics, and space industry), to scientific investigations on measuring Casimir forces of magnetic origin and gravitational physics.

Denna post skapades 2017-09-25. Senast ändrad 2017-10-03.
CPL Pubid: 252043


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Institutionen för mikroteknologi och nanovetenskap



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