The phrase "a magnet that" is correct and usable in written English.
It can be used to describe something that attracts or draws in a particular quality or characteristic.
Example: "She has a personality that is a magnet that draws people to her effortlessly."
Alternatives: "an attraction that" or "a force that".
The sepsis device then has a magnet that pulls the pathogen-coated magnetic beads through the channels to cleanse the blood flowing through the device, which is then returned to the patient.
Consequently, many core/shell structured materials with a magnetic metallic core and a dielectric shell have been investigated, in which the magnetic metallic materials act as a magnet that increases the permeability of the composites.
(An angstrom is equivalent to three-billionths of a foot). At the proper size, these crystals form a magnet that is locked into a specific magnetic orientation, such as north-south.
Attached to the wheel itself (and thus free-moving) is a magnet that, as the wheel spins, will pass directly alongside the magnetic sensor.
"It's a a magnet that keeps growing in power," he said.
Hitachi Metals, meanwhile, is working on a magnet that minimizes the use of rare earths by employing copper alloys.
Various types of clinical MRI systems currently use a superconductive magnet that creates a static magnetic field strength, typically 1.5 or 3 T.
Its LED-illuminated head is attached to a rod by a spherical magnet that moves up and down and spins around with a gentle push of the hand.
In the latest prototype, the scientists fashioned a permanent magnet that generates a field nearly as strong.
From Argonne National Laboratory, southwest of Chicago, to the Stanford Linear Accelerator Center, in Palo Alto, California, it was carrying a superconducting magnet that weighed a hundred and seven tons.
Several poll participants said they feared creating a new magnet that could cause a flood across the border if the United States did not take decisive action.
