Emergence of Antiferromagnetic Correlation in LiTi2-xVxO4 via 7Li NMR

Details Emergence of Antiferromagnetic Correlation in LiTi2-xVxO4 via 7Li NMR Emergence of Antiferromagnetic Correlation in LiTi2-xVxO4 via 7Li NMR

2008-10-27

arxiv.org/abs/0810.4865v1

J. Phys. Soc. Jpn. Vol. 77 (2008) 123713

Physics

Condensed Matter

Superconductivity

4 pages, 7 figures

Scientific paper

10.1143/JPSJ.77.123713

We report 7Li NMR studies of V-substitution effects on spinel oxide superconductor LiTi2O4 (Tc = 13.4 K). In LiTi2-xVxO4 (x = 0-0.4), the V substitution for the Ti site suppressed the relative volume fraction of superconductivity faster than Tc. From the observation of fairly homogeneous enhancement in a 7Li nuclear spin-lattice relaxation rate, we conclude that the V substitution changes electron correlation effects through electron carrier doping from quarter electron filling 3d0.5 to 3d1.5 and then the antiferromagnetic correlation emerges.

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