Weak ferromagnetism in Mn nanochains on the CuN surface

Details Weak ferromagnetism in Mn nanochains on the CuN surface Weak ferromagnetism in Mn nanochains on the CuN surface

2008-01-18

arxiv.org/abs/0801.2857v1

Phys. Rev. B 79, 144418 (2009)

Physics

Condensed Matter

Materials Science

8 pages, 7 figures

Scientific paper

10.1103/PhysRevB.79.144418

We investigate electronic and magnetic structures of the Mn chains supported on the CuN surface using first-principle LSDA and LDA+U calculations. The isotropic exchange integrals and anisotropic Dzyaloshinskii-Moriya interactions between Mn atoms are calculated using Green function formalism. It is shown that the account of lattice relaxation and on-site Coulomb interaction are important for accurate description of magnetic properties of the investigated nanosystems. We predict a weak ferromagnetism phenomenon in the Mn antiferromagnetic nanochains on the CuN surface. The value of a net magnetic moment and direction of spin canting are calculated. We show that some experimental features may be explained using anisotropic exchange interactions.

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