Resistance of ceramic samples: 2D localization and time dependence

J. Llumà*, X. X. Zhang, J. M. Hernàndez, J. Tejada, G. F. Sun, Y. Xin, K. W. Wong

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


In this paper, we report results of giant magnetoresistance obtained in a ceramic sample. The results show that between 40 mK and 30 K, the resistance increases as log(T) when temperature decreasing, which could be associated with the two-dimensional weak localization effect. The time dependence of the resistance after changing the magnetic field was also measured at different temperatures. At temperatures higher than 2 K, the decay of resistance is associated with the decay of the magnetization. Bellow this temperature, however, the observed large variation of the resistance with time after changing the magnetic field may be associated with the reconfiguration of magnetic structure.

Original languageEnglish (US)
Pages (from-to)2493-2494
Number of pages2
JournalCzechoslovak Journal of Physics
Issue numberSUPPL. 5
StatePublished - 1996
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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