Тип публикации: статья из журнала

Год издания: 2012

Идентификатор DOI: 10.1103/PhysRevLett.108.236401

Ключевые слова: Charge ordering, Electronic and magnetic properties, Electronic transport measurements, Floating zones, High quality, Higher temperatures, Model calculations, Cobalt compounds, Ferromagnetic materials, Ferromagnetism, Hydration, Magnetic properties, Single crystals, Sodium

Аннотация: We report electronic transport measurements on high quality floating zone grown NaxCoO2 and Na0.41CoO2 center dot 0.6H(2)O single crystals. We find an in-plane electronic scattering minimum near 11 K and a clear charge ordering at approximately 50 K. The electronic and magnetic properties in hydrated and nonhydrated Na0.41CoO2 sampПоказать полностьюles are similar at higher temperature, but evolve in markedly different ways below similar to 50 K, where a strong ferromagnetic tendency is observed in the hydrated sample. Model calculations show the relationship of this tendency to the structure of the Fermi surface. The results, particularly the clear differences between the hydrated and nonhydrated material show a substantially enhanced ferromagnetic tendency upon hydration. Implications for superconductivity are discussed.

Журнал: PHYSICAL REVIEW LETTERS

Выпуск журнала: Vol. 108, Is. 23

ISSN журнала: 00319007

Место издания: COLLEGE PK

Издатель: AMER PHYSICAL SOC

• Cao G. (Department of Materials Science and Engineering,University of Tennessee)
• Gao Y. (Max-Planck-Institute for Solid State Research)
• Le Tacon M. (Max-Planck-Institute for Solid State Research)
• Lin C. (Max-Planck-Institute for Solid State Research)
• Korshunov M.M. (Siberian Federal University)
• Singh D.J. (Materials Science and Technology Division,Oak Ridge National Laboratory)

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