Ferromagnetic and antiferromagnetic dimer splittings in LaMn0.1Ga0.9O3

A. Furrer; E. Pomjakushina; V. Pomjakushin; J. P. Embs; Th. Straessle

doi:10.1103/PhysRevB.83.174442

Ferromagnetic and antiferromagnetic dimer splittings in LaMn0.1Ga0.9O3

Strongly Correlated Electrons 2015-05-28 v1

Authors: A. Furrer , E. Pomjakushina , V. Pomjakushin , J. P. Embs , Th. Straessle

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Abstract

Inelastic neutron scattering was employed to study the magnetic excitations of Mn3+ dimers in LaMn0.1Ga0.9O3. The nearest-neighbor interaction of Mn3+ ions is ferromagnetic in the basal (a,b)-plane, but antiferromagnetic along the c-direction, thus two different types of dimer excitations are simultaneously present in the experiments. From the observed energy spectra we derive Heisenberg-type exchange interactions Jab=0.210(4) meV and Jc=-0.285(5) meV as well as an axial anisotropy parameter D=0.036(6) meV. These parameters considerably differ from those derived for the isostructural parent compound LaMnO3 due to structural effects.

Keywords

inelastic neutron scattering magnetic excitations Mn3+ dimers ferromagnetic interaction antiferromagnetic interaction Heisenberg exchange axial anisotropy

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@article{arxiv.1106.0161,
  title  = {Ferromagnetic and antiferromagnetic dimer splittings in LaMn0.1Ga0.9O3},
  author = {A. Furrer and E. Pomjakushina and V. Pomjakushin and J. P. Embs and Th. Straessle},
  journal= {arXiv preprint arXiv:1106.0161},
  year   = {2015}
}

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21 pages, 5 figures, 3 tables

Ferromagnetic and antiferromagnetic dimer splittings in LaMn0.1Ga0.9O3

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