Unconventional magnetic transition and transport behavior in Na0.75CoO2

T. Motohashi, R. Ueda, E. Naujalis, T. Tojo, I. Terasaki, T. Atake, M. Karppinen, and H. Yamauchi
Phys. Rev. B 67, 064406 – Published 6 February 2003
PDFExport Citation

Abstract

Here we report an unconventional magnetic and transport phenomenon in a layered cobalt oxide NaxCoO2. Only for x=0.75, a magnetic transition of the second order was clearly detected at Tm22K where an apparent specific-heat jump, an onset of extremely small spontaneous magnetization, and a kink in resistivity came in. Moreover large positive magnetoresistance effect was observed below Tm. These features of the transition strongly indicate the appearance of an unusual electronic state that may be attributed to the strongly correlated electrons in Na0.75CoO2.

  • Received 27 August 2002

DOI:https://doi.org/10.1103/PhysRevB.67.064406

©2003 American Physical Society

Authors & Affiliations

T. Motohashi1,*, R. Ueda1, E. Naujalis1, T. Tojo1, I. Terasaki2, T. Atake1, M. Karppinen1, and H. Yamauchi1

  • 1Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan
  • 2Department of Applied Physics, Waseda University, Tokyo 169-8555, Japan

  • *Electronic address: t-mot@msl.titech.ac.jp

References (Subscription Required)

Click to Expand
Issue

Vol. 67, Iss. 6 — 1 February 2003

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×