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arXiv · 1403.2804

Magnetic structure of the conductive triangular-lattice antiferromagnet PdCrO2

Hiroshi Takatsu·Gwilherm Nénert·Hiroaki Kadowaki·Hideki Yoshizawa·Mechthild Enderle·Shingo Yonezawa·Yoshiteru Maeno·Jungeun Kim·Naruki Tsuji·Masaki Takata·Yang Zhao·Mark Green·Collin Broholm
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Abstract

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 plane in different Cr layers seem to tilt with one another, leading to a small noncoplanarity. Such a small but finite non-coplanar 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.

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Hiroshi Takatsu, Gwilherm Nénert, Hiroaki Kadowaki, Hideki Yoshizawa, Mechthild Enderle, Shingo Yonezawa, Yoshiteru Maeno, Jungeun Kim, Naruki Tsuji, Masaki Takata, Yang Zhao, Mark Green, Collin Broholm. 2014-03-12. Magnetic structure of the conductive triangular-lattice antiferromagnet PdCrO2. https://doi.org/10.1103/physrevb.89.104408

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