A new magnet, almost the size of a tablespoon, has taken the title of “world’s strongest magnetic field” from the metal titan held for two decades at the National High Magnetic Field Laboratory based at Florida State University, and the magnet, whose thickness does not exceed one centimeter, broke the record by creating a 45.5-Tesla magnetic field.

This value is 15–20 times larger than the field created by MRI devices with strong magnets used in hospitals. The record for the highest field from 1999 to the present was held by a massive 30-ton magnet located in the same laboratory. This giant magnet can produce a 45-Tesla magnetic field. The new magnet, on the other hand, weighs only 390 grams.

According to the statements of MagLab director Greg Boebinger, a new conductor was used in the developed magnet. Scientists using rare earth barium copper oxide (REBCO) metal were able to pass twice as much current through superconductors in the same surface area thanks to this.

https://phys.org/news/2019-06-national-maglab-world-record-magnetic-field.html