MRAM – Magneto-resistive RAM. It and STT-RAM (Spin Transfer Torque RAM) are the same thing: non-volatile and byte-addressable memory using spin-polarised currents to change the magnetic orientation, and hence bit value, of a cell. Crocus, Everspin and STT are the main developers here and they claim their technology has DRAM speed and can replace DRAM and NAND, plus SRAM and NIR, and function as a universal memory. But no semiconductor foundry has adopted the chip design for mass production and consequently the technology is unproven as practical SCM.
![](https://cdn.statically.io/img/blocksandfiles.com/wp-content/uploads/2022/01/STT-MRAM-1.jpg)
![](https://cdn.statically.io/img/blocksandfiles.com/wp-content/uploads/2019/05/everspin_mram.jpg)
![](https://cdn.statically.io/img/blocksandfiles.com/wp-content/uploads/2019/02/mram-by-spin-chips-B.jpg)