Transition from antiferromagnetic ground state to robust ferrimagnetic order with Curie temperatures above 420 K in manganese-based antiperovskite-type structures.

ABSTRACT: Manganese (Mn)-based antiperovskite structures (Mn₃AX, where A and X represent the 3d transition-metal elements and N or C atoms, respectively) have attracted growing attention because of their novel electronic and magnetic properties. However, the lack of an effective approach to regulate the magnetic coupling in Mn₃AX crystal structure, particularly in antiferromagnetic ground states, hinders their further design and applications. Herein, robust high-temperature ferrimagnetic order with a Curie temperature ( TC ) in the range of ~390-420 K was successfully achieved in Mn3GaxNx ( x=0.5 , 0.6, and 0.7) via composition-deficient engineering. A systematic investigation, including synchrotron X-ray diffraction, neutron powder diffraction, pair distribution functio

SUBMITTER: Zhang X 

PROVIDER: S-EPMC11467814 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature