Tuning colossal magnetoresistance response by Cr substitution in La[sub 0.67]Sr[sub 0.33]MnO[sub 3]

Sun, Young; Tong, Wei; Xu, Xiaojun; Zhang, Yuheng
January 2001
Applied Physics Letters;1/29/2001, Vol. 78 Issue 5, p643
Academic Journal
We have studied the effects of Cr substitution in the perovskite La[sub 0.67]Sr[sub 0.33]MnO[sub 3] on the magnetic, electrical transport, and magnetoresistance properties. Cluster glass behaviors have been observed in the La[sub 0.67]Sr[sub 0.33]Mn[sub 1-x]Cr[sub x]O[sub 3] system. The most interesting feature is that extraordinary transport and colossal magnetoresistance (CMR) behaviors, characterized by double peaks, were observed with Cr substitution. When 0.1≤x≤0.2, the temperature range of CMR response is greatly broadened, from the lowest temperature to above room temperature. These results suggest that Cr substitution can be a potent way in tuning CMR response and also imply a ferromagnetic interaction similar to double exchange occurs between Mn and Cr. © 2001 American Institute of Physics.


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