Ferromagnetic and antiferromagnetic dimer splittings in LaMn0.1Ga0.9O3
A. Furrer, E. Pomjakushina, V. Pomjakushin, J. P. Embs, and Th., Straessle
TL;DR
This study uses inelastic neutron scattering to analyze magnetic excitations in LaMn0.1Ga0.9O3, revealing ferromagnetic and antiferromagnetic dimer interactions and deriving key exchange parameters affected by structural differences.
Contribution
The paper provides the first detailed measurement of dimer exchange interactions in LaMn0.1Ga0.9O3, highlighting differences from LaMnO3 due to structural effects.
Findings
Ferromagnetic interaction in the basal plane (Jab=0.210 meV)
Antiferromagnetic interaction along c-axis (Jc=-0.285 meV)
Axial anisotropy parameter D=0.036 meV
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.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.