Magnetotransport behavior and the phase diagram of Nd1-xCa xMn03 U
Journal
IEEE Transactions on Magnetics
Journal Volume
45
Journal Issue
10
Pages
4345-4347
Date Issued
2009
Author(s)
Abstract
In this work, the temperature dependent magnetization M(T) and the electrical resistivity rho (T) of Nd 1-x Ca x MnO 3 (x=0.1-0.5) are measured. From the M(T) curves, the ferromagnetic (FM) phase is observed for samples of x=0.1 and 0.2. However, the canted-antiferromagnetic (CAF) phase which coexists with the charge-ordering (CO) phase occurs at low temperature for samples x=0.3-0.5. By systematically changing the Ca concentration from x=0.1 to 0.5, a detailed phase diagram is established. Based on the result of magnetic field dependent rho (T), the magnetoresistance ratio is calculated, which shows a maximum in the x=0.4 sample. These results are helpful for improving the MR effect in these manganites.
Type
journal article