Magnetic structure of the conductive triangular-lattice antiferromagnet PdCrO2 | |
Article | |
关键词: NEUTRON POWDER DIFFRACTION; BERRY PHASE; HEISENBERG-ANTIFERROMAGNET; SOLID OXYGEN; OXIDES; FERROMAGNET; CHIRALITY; LICRO2; STATE; | |
DOI : 10.1103/PhysRevB.89.104408 | |
来源: SCIE |
【 摘 要 】
We performed neutron single-crystal and synchrotron x-ray powder diffraction experiments in order to investigate the magnetic and crystal structures of the conductive layered triangular-lattice antiferromagnet PdCrO2 with a putative spin chirality, which contributes to an unconventional anomalous Hall effect. We revealed that the ground-state magnetic structure is a commensurate and nearly coplanar 120 degrees spin structure. The 120 degrees planes in different Cr layers seem to tilt with one another, leading to a small noncoplanarity. Such a small but finite noncoplanar stacking of the 120 degrees planes gives rise to a finite scalar spin chirality, which may be responsible for the unconventional nature of the Hall effect of PdCrO2.
【 授权许可】
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