Anisotropic Magnetoresistance in Charge-Ordering $N{a}_{0.34}(H_{3}O{)}_{0.15}Co{O}_2$:Strong Spin-Charge Coupling and Spin Ordering

Abstract

Angular-dependent in-plane magnetoresistance (AMR) for single crystal $N{a}_{0.34}(H_{3}O{)}_{0.15}Co{O}_2$ with charge ordering is studied systematically. The anisotropic magnetoresistance shows a twofold symmetry at high temperature with rotating H in the Co-O plane, while a sixfold symmetry below a certain temperature ($T_{\rho }$). At $T_{\rho }$, the symmetry of AMR changes from twofold to fourfold with rotating magnetic field (H) in the plane consisting of the current and c-axis. The variation of AMR symmetry with temperature arises from the subtle changes of the spin structure. These results give a direct evidence for the itinerant electrons directly coupled to the localized spins.

arXiv comment4 pages, 4 figures

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Cited by in corpus (3)

• NMR studies of Successive Phase Transitions in Na0.5CoO2 and K0.5CoO2
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• Magnetotransport properties in purple bronze Li${}_{0.9}$Mo${}_6$O${}_{17}$ Single Crystal