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Thermodynamic and Magnetotransport Properties of High Quality Na_{0.77}CoO_{2} Single Crystals

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Heat capacity and electrical resistivity of high-quality Na_{0.77}CoO_{2} single crystals was systematically studied as a function of temperature and magnetic field. Anomalies at 20 K have been observed both in the heat capacity and the electrical resistivity. The broad bump in the heat capacity indicates a smeared magnetic phase transition. Magnetic fields up to 9 T, oriented perpendicularly to the ab plane, reduce the temperature of this anomaly in accordance with the assumption of A-type antiferromagnetic ordering. The low temperature upturn observed in resistivity below 20 K for slow cooling is also suppressed by the magnetic field. This anomaly is probably the consequence of the interplay of several different mechanisms, including the Kondo effect, electron-electron interactions, and electron-phonon scattering.
  • Department of Physics, Faculty of Electrical Engineering and Informatics, Technical University of Košice, Park Komenského 2, 042 00 Košice, Slovakia
  • Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 040 01 Košice, Slovakia
  • Institute of Physics, Faculty of Science, P. J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia
  • Max-Planck-Institute for Solid State Research, Heisenbergstrasse 1, D- 70569 Stuttgart, Germany
  • Institute of Physics, Faculty of Science, P. J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia
  • [1] M.L. Foo, Y. Wang, S. Watauchi, H.W. Zandbergen, T. He, R.J. Cava, N.P. Ong, Phys. Rev. Lett. 92, 247001 (2004), doi: 10.1103/PhysRevLett.92.247001
  • [2] A. Zorkovská, A. Baran, M. Kajňaková, A. Feher, J. Šebek, E. Šantavá, C.T. Lin , J.B. Peng, Phys. Status Solidi B 247, 665 (2010), doi: 10.1002/pssb.200983032
  • [3] T.F. Schulze, P.S. Häfliger, Ch. Niedermayer, K. Mattenberger, S. Bubenhofer, B. Batlogg, Phys. Rev. Lett. 100, 026407 (2008), doi: 10.1103/PhysRevLett.100.026407
  • [4] A. Baran, M. Botko, A. Zorkovská, M. Kajňaková, J. Šebek, E. Šantavá, C.T. Lin, J.P. Peng , A. Feher, Low Temp. Phys. 35, 807 (2009), doi: 10.1063/1.3253404
  • [5] S.P. Bayrakci, I. Mirebeau, P. Bourges, Y. Sidis, M. Enderle, J. Mesot, D.P. Chen, C.T. Lin, B. Keimer, Phys. Rev. Lett. 94, 157205 (2005), doi: 10.1103/PhysRevLett.94.157205
  • [6] D.J.P. Morris, M. Roger, M.J. Gutmann, J.P. Goff, D.A. Tennant, D. Prabhakaran, A.T. Boothroyd, E. Dudzik, R. Feyerherm, J.-U. Hoffmann, K. Kiefer, Phys. Rev. B 79, 100103 (2009), doi: 10.1103/PhysRevB.79.100103
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