Satoru Noguchi et al 2004 J. Phys.: Condens. Matter 16 S5769 doi:10.1088/0953-8984/16/48/045
Tunnelling magnetoresistance of misfit layered cobaltite Ca3−xYxCo4O9 (x = 0, 0.1, 0.2)
Satoru Noguchi1, Takeyuki Sekimoto2 and Takekazu Ishida
Show affiliationsWe have measured the electrical resistance and the high-field magnetoresistance (MR) up to 30 T for nano-scale misfit layered compounds Ca3−xYxCo4O9 (x = 0, 0.1, 0.2). The resistance shows the characteristic behaviour 
of the variable range tunnelling at low temperatures. The negative MR ratio increases remarkably with decreasing temperature and with increasing x at temperatures below 20 K. We propose that the MR in the cobaltite can be explained by the magnetic tunnelling effect.
- PACS
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72.20.My Galvanomagnetic and other magnetotransport effects
- Subjects
- Dates
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Issue 48 (8 December 2004)
Received 6 May 2004
Published 19 November 2004
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Tunnelling magnetoresistance of misfit layered cobaltite Ca3−xYxCo4O9 (x = 0, 0.1, 0.2)
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