Back to Search
Start Over
Noncollinear Magnetic Structure and Multipolar Order in Eu_{2}Ir_{2}O_{7}.
- Source :
-
Physical review letters [Phys Rev Lett] 2017 Nov 03; Vol. 119 (18), pp. 187203. Date of Electronic Publication: 2017 Nov 02. - Publication Year :
- 2017
-
Abstract
- The magnetic properties of the pyrochlore iridate material Eu_{2}Ir_{2}O_{7} (5d^{5}) have been studied based on first principles calculations, where the crystal field splitting Δ, spin-orbit coupling (SOC) λ, and Coulomb interaction U within Ir 5d orbitals all play significant roles. The ground state phase diagram has been obtained with respect to the strength of SOC and Coulomb interaction U, where a stable antiferromagnetic ground state with all-in-all-out (AIAO) spin structure has been found. In addition, another antiferromagnetic state with energy close to AIAO has also been found to be stable. The calculated nonlinear magnetization of the two stable states both have the d-wave pattern but with a π/4 phase difference, which can perfectly explain the experimentally observed nonlinear magnetization pattern. Compared with the results of the nondistorted structure, it turns out that the trigonal lattice distortion is crucial for stabilizing the AIAO state in Eu_{2}Ir_{2}O_{7}. Furthermore, besides large dipolar moments, we also find considerable octupolar moments in the magnetic states.
Details
- Language :
- English
- ISSN :
- 1079-7114
- Volume :
- 119
- Issue :
- 18
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 29219540
- Full Text :
- https://doi.org/10.1103/PhysRevLett.119.187203