Physics – Condensed Matter
Scientific paper
2000-01-06
Physics
Condensed Matter
9 pages, LATEX, 3 postscript figures
Scientific paper
10.1063/1.372537
The ground state of La_{1-x}Ca_{x}MnO_{3} changes from a ferromagnetic metallic to an antiferromagnetic charge-ordered state as a function of Ca concentration at x ~ 0.50. We present evidence from transport measurements on a sample with x = 0.50 that the two phases can coexist, in agreement with other observations of phase separation in these materials. We also observe that, by applying and then removing a magnetic field to the mainly charge-ordered state at some temperatures, we can "magnetically anneal" the charge order, resulting in a higher zero-field resistivity. We also observe logarithmic time dependence in both resistivity and magnetization after a field sweep at low temperatures.
Mitchell John F.
Roy Mou
Schiffer Peter
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