Hall effect in the metallic antiferromagnet NaxCoO2 (0.72 ≤ x ≤ 0.90)

被引：5

作者：

Mandal, P. ^{[1
]}

Choudhury, P. ^{[2
]}

机构：

[1] Saha Inst Nucl Phys, Kolkata 700064, W Bengal, India

[2] Cent Glass & Ceram Res Inst, Kolkata 700032, W Bengal, India

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.86.094423

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the magnetic and magnetotransport properties of NaxCoO2 single crystals in the heavily doped region (0.72 <= x <= 0.90). Both the Hall coefficient (R-H) and the susceptibility (chi) exhibit strong temperature dependence in the antiferromagnetic (AFM) as well as in the paramagnetic (PM) states. As the AFM ordering sets in, below T-N = 21 K, R-H decreases sharply with T down to similar to 10 K and then increases rapidly. The temperature and field dependence of R-H indicates the emergence of a weak ferromagneticlike phase below 10 K. In the AFM state, R-H scales linearly with chi. The observed T dependence of R-H in the PM state has been discussed in light of the theoretical model proposed for strongly correlated electrons in a triangular lattice.

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页数：5

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