Ferrimagnetic Heusler tunnel junctions with fast spin-transfer torque switching enabled by low magnetization.

ABSTRACT: Magnetic random-access memory that uses magnetic tunnel junction memory cells is a high-performance, non-volatile memory technology that goes beyond traditional charge-based memories. Today, its speed is limited by the high magnetization of the memory storage layer. Here we prepare magnetic tunnel junction memory devices with a low magnetization ferrimagnetic Heusler alloy Mn₃Ge as the memory storage layer on technologically relevant amorphous substrates using a combination of a nitride seed layer and a chemical templating layer. We switch the magnetic state of the storage layer with nanosecond long write pulses at a reliable write error rate of 10^-7 and detect a tunnelling magnetoresistance of 87% at ambient temperature. These results provide a strategy towards lower

SUBMITTER: Garg C 

PROVIDER: S-EPMC11919757 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature