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The low-temperature resistivity and magnetoresistance of icosahedral quasicrystalline Al–Cu–Cr

Banerjee, S and Raychaudhuri, AK and Goswami, R and Chattopadhyay, K (1997) The low-temperature resistivity and magnetoresistance of icosahedral quasicrystalline Al–Cu–Cr. In: Journal of Physics: Condensed Matter, 9 (31). pp. 6643-6650.

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The temperature and magnetic field dependence of the resistivity of quasicrystalline $Al_{65}Cu_{20}Cr_{15}$ alloy in the temperature range 1.7 K to 115 K and for fields up to 6.5 T were measured. While the resistivity $(\rho(T)$ has a maximum at $T\simeq45K$, it decreases with increasing T for T > 45 K, as for other icosahedral quasicrystals. However, for T < 45 K, $\rho$ decreases with decreasing T . The magnetoresistance (MR) is positive over the whole temperature range. We have tried to explain our observation using existing theories. The low-temperature resistivity $\rho(T)$ (T < 45 K), the resistivity maxima at $T\simeq 45 K$, and the positive MR can be explained by invoking antilocalization effects due to strong spin–orbit interactions. We have also tried to explore other approaches which give rise to positive MR.

Item Type: Journal Article
Publication: Journal of Physics: Condensed Matter
Publisher: Institute of Physics (IOP)
Additional Information: Copyright of this article belongs to Institute of Physics (IOP).
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 29 May 2007
Last Modified: 19 Sep 2010 04:35
URI: http://eprints.iisc.ac.in/id/eprint/10085

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