Nature of the Magnetic Interactions in Sr$_3$NiIrO$_6$

Turan Birol; Kristjan Haule; David Vanderbilt

doi:10.1103/PhysRevB.98.134432

Nature of the Magnetic Interactions in Sr$_3$NiIrO$_6$

Materials Science 2018-10-19 v2 Strongly Correlated Electrons

Authors: Turan Birol , Kristjan Haule , David Vanderbilt

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Abstract

Iridates abound with interesting magnetic behaviours because of their strong spin-orbit coupling. Sr $_3$ NiIrO $_6$ brings together the spin-orbital entanglement of the Ir $^{4+}$ ion with a 3 $d$ Ni cation and a one-dimensional crystal structure. It has a ferrimagnetic ground state with a 55 T coercive field. We perform a theoretical study of the magnetic interactions in this compound, and elucidate the role of anisotropic symmetric exchange as the source of its strong magnetic anisotropy. Our first-principles calculations reproduce the magnon spectra of this compound and predict a signature in the cross sections that can differentiate the anisotropic exchange from single-ion anisotopy.

Keywords

iridates spin-orbit coupling magnetic interactions anisotropic exchange first-principles calculations sr3niiro6

Cite

@article{arxiv.1805.03733,
  title  = {Nature of the Magnetic Interactions in Sr$_3$NiIrO$_6$},
  author = {Turan Birol and Kristjan Haule and David Vanderbilt},
  journal= {arXiv preprint arXiv:1805.03733},
  year   = {2018}
}

Comments

7 pages, 5 figures

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