Abstract
Band Jahn-Teller type structural instabilities of cubic Mn(2)YZ Heusler compounds causing tetragonal distortions can be predicted by ab initio band-structure calculations. This allows for identification of new Heusler materials with tunable magnetic and structural properties that can satisfy the demands for spintronic applications, such as in spin-transfer torque-based devices.
Highlights
Heusler compounds represent a remarkable class of materials with more than 1500 members
For an optimal balance between switching current, fast switching and thermal stability, the magnetic moment of Mn3–xGa is not sufficiently low. In this communication we discuss approaches based on ab-initio theory for the design of additional tetragonal perpendicular magnetocrystalline anisotropy (PMA) Heusler compounds with tunable moment for spin-transfer torque (STT) applications and their experimental verification
The derived energy profiles allow for distinguishing between a stable tetragonal distortion (e.g., Mn3Ga), a stable cubic structure (e.g., Mn2CoGa), and a shape memory system (e.g., Mn2NiGa)
Summary
Heusler compounds represent a remarkable class of materials with more than 1500 members. In this communication we discuss approaches based on ab-initio theory for the design of additional tetragonal PMA Heusler compounds with tunable moment for STT applications and their experimental verification.
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