Magnetic ram (MRAM) uses magnetic charges rather than an electrical charge to store data.The MRAM is made of millions magnetic "sandwiches". Each sandwich consists of two iron plates and a thin insulating layer. One of the iron plates is a magnet which is set to a specific charge, whereas the other plate is variable and allows for the polarity to change according to the pull of the external fields.
The advantage of MRAM is that it retains data when power is turned off, offers a higher read write speed, consumes a low level of power...