Physics – Condensed Matter – Materials Science
Scientific paper
2010-09-28
Physics
Condensed Matter
Materials Science
14 pages, 5 figures, To appear in Journal of Applied Physics
Scientific paper
The dielectric behavior of half doped manganites La0.5Ca0.5-xSrxMnO3 (0.1 \leq \times \leq 0.4) with varying magnetic ground states has been studied. The real part of relative permittivity as a function of temperature {\epsilon}^'(T), exhibits a maximum around the ferromagnetic (TC) and charge ordering transition (TCO) temperatures accompanied with high dielectric losses. The activation energies obtained for x = 0.1 and 0.3 samples below TCO are the same ~ 0.12eV, whereas the relaxation time constant varies in the range 2.8 \times 10-9 s - 6.03 \times 10-11 s. In contrast to samples having x \leq 0.3, for x = 0.4 doping the dielectric permittivity exhibits a strong temperature dependence in the vicinity of magnetic phase transitions. This behavior may be correlated with the presence of competing magnetic interactions (magnetic polarons) close to the magnetic transitions.
Das Arnab
Deshpande S. K.
Dhiman Indu
No associations
LandOfFree
The Dielectric Response of La0.5Ca0.5-xSrxMnO3 (0.1 <= x <= 0.4) Manganites with Different Magnetic Ground States does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Dielectric Response of La0.5Ca0.5-xSrxMnO3 (0.1 <= x <= 0.4) Manganites with Different Magnetic Ground States, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Dielectric Response of La0.5Ca0.5-xSrxMnO3 (0.1 <= x <= 0.4) Manganites with Different Magnetic Ground States will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-693351