Antiferromagnetic MnN layer on the MnGa(001) surface

作者：Guerrero Sanchez J^*; Takeuchi Noboru

来源：Applied Surface Science, 2016, 390: 328-332.

DOI：10.1016/j.apsusc.2016.08.076

• Surfaces
• Stability
• Spin density
• Ferromagnetic/antiferromagnetic alignment

Spin polarized first principles total energy calculations have been applied to study the stability and magnetic properties of the MnGa(001) surface and the formation of a topmost MnN layer with the deposit of nitrogen. Before nitrogen adsorption, surface formation energies show a stable gallium terminated ferromagnetic surface. After incorporation of nitrogen atoms, the antiferromagnetic manganese terminated surface becomes stable due to the formation of a MnN layer (Mn-N bonding at the surface). Spin density distribution shows a ferromagnetic/antiferromagnetic arrangement in the first surface layers. This thermodynamically stable structure may be exploited to growth MnGa/MnN magnetic heterostructures as well as to look for exchange biased systems.

• 出版日期2016-12-30