Bhattacharya, Dipten and Maiti, Himadri Sekhar (2002) Reentrant metallic transition at a temperature above T-c at the breakdown of cooperative Jahn-Teller orbital order in perovskite manganites. Physical Review B, 66 (13). Article No.-132413. ISSN 1098-0121

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We report an interesting reentrant metallic resistivity pattern beyond a characteristic temperature T* which is higher than other such characteristic transition temperatures like T-c (Curie point), T-N (Neel point), T-CO (charge order onset point) or T-OO (orbital order onset point) in a range of rare-earth perovskite manganites (RE(1-x)A(x)MnO(3); RE=La, Nd, Y; A=Sr, Ca; x=0.0-0.5). Such a behavior is normally observed in doped manganites with doping level (x) higher than the critical doping level x(c) (=0.17-0.22) required for the metallic ground state to emerge and hence in a system where cooperative Jahn-Teller orbital order has already undergone a breakdown. However, the observation made in the La1-xCaxMnO3 (x=0.0-0.3) series turns out to be an exception to this general trend.

Item Type: Article
Subjects: Electronics
Depositing User: Bidhan Chaudhuri
Date Deposited: 22 Mar 2012 12:31
Last Modified: 22 Mar 2012 12:31

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