Cascade of Bulk Magnetic Phase Transitions inNaxCoO2as Studied by Muon Spin Rotation

2005/01/10 by P. Mendels, D. Bono, J. Bobroff +10 · 3 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.94.136403

published as Phys. Rev. Lett. 94, 136403 (2005) · Sumitted to Phys. Rev. Lett., 1 Oct 2004, revised version

arxiv created 2005/01/10 · openalex publication_date 2005/04/06 · arxiv updated 2009/12/01 · openalex created_date 2017/03/16 · openalex updated_date 2026/08/04

Abstract

Using muon spin rotation, well-defined bulk approximately 100% magnetic phases in NaxCoO2 are revealed. A novel magnetic phase is detected for x=0.85 with the highest transition temperature ever observed for x>or=0.75. This stresses the diversity of x>or=0.75 magnetic phases and the link between magnetic and structural degrees of freedom. For the charge-ordered x=0.50 compound, a cascade of transitions is observed below 85 K. From a detailed analysis of our data, we conclude that the ordered moment varies continuously with temperature and suggest that the two secondary transitions at 48 and 29 K correspond to a moderate reorientation of antiferromagnetically coupled moments.

Citations

• Bulk antiferromagnetism inNa0.82CoO2single crystals
• Dome-Shaped Magnetic Phase Diagram of Thermoelectric Layered Cobaltites

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