In-plane ferromagnetism in charge-ordering $Na_{0.55}CoO_2$

C. H. Wang; X. H. Chen; T. Wu; X. G. Luo; G. Y. Wang; J. L. Luo

doi:10.1103/PhysRevLett.96.216401

paper

In-plane ferromagnetism in charge-ordering $N a_{0.55} C o O_{2}$

arXiv:cond-mat/0512507 · doi:10.1103/PhysRevLett.96.216401

Abstract

The magnetic and transport properties are systematically studied on the single crystal $N a_{0.55} C o O_{2}$ with charge ordering and divergency in resistivity below 50 K. A long-range ferromagnetic ordering is observed in susceptibility below 20 K with the magnetic field parallel to Co-O plane, while a negligible behavior is observed with the field perpendicular to the Co-O plane. It definitely gives a direct evidence for the existence of in-plane ferromagnetism below 20 K. The observed magnetoresistance (MR) of 30 % at the field of 6 T at low temperatures indicates an unexpectedly strong spin-charge coupling in triangle lattice systems.

arXiv comment4 pages, 5 figures

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In-plane ferromagnetism in charge-ordering Na0.55​CoO2​

Abstract

References in corpus (16)

Cited by in corpus (5)

In-plane ferromagnetism in charge-ordering $N a_{0.55} C o O_{2}$