Mandal, P and Choudhury, Pranab (2012) Hall effect in the metallic antiferromagnet NaxCoO2 (0.72 <= x <= 0.90). Physical Review B, 86 (9). Article No-094423. ISSN 1098-0121

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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.

Item Type: Article
Subjects: Electronics
Depositing User: Bidhan Chaudhuri
Date Deposited: 01 Nov 2012 08:32
Last Modified: 01 Nov 2012 08:32

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