Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2002-04-20
Physics
Condensed Matter
Strongly Correlated Electrons
23 pages (7 figures + 2 tables) (PDF file)
Scientific paper
10.1016/S0304-8853(02)01171-X
X-ray diffraction, resistivity, ac susceptibility and magnetization studies on La0.67Ca0.33Mn1-xRuxO3 (0 x < 0.1) were carried out. A significant increase in the lattice parameters indicated the presence of mixed valance state of Ru: Ru3+ and Ru4+. The resistivity of the doped compounds exhibited two features: a broad maximum and a relatively sharp peak. While a para to ferromagnetic transition could be observed for the latter peak, no magnetic signal either in ac susceptibility or in magnetization measurements could be observed for the broad maximum. The magnetic moment decreases non linearly from 3.55 to 3 mB over the Ru composition from 0 to 8.5 at.%. Based on the results of the present studies and on existing literature on the Mn-site substituted systems, we argue that a magnetic phase separation occurs in the Ru doped system. While the sharp peak in the resistivity corresponds to Ru4+ enriched region with a ferromagnetic coupling with neighboring Mn ions, the broad peak corresponds to a Ru3+ rich regions, with an antiferromagnetic coupling with neighboring Mn ions.
Chandra Sharat
Lakshmi Seetha L.
Narayanasamy A.
Natarajan D. V.
Pandian Ponn
No associations
LandOfFree
Possible Magnetic separation in Ru doped La0.67Ca0.33MnO3 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 Possible Magnetic separation in Ru doped La0.67Ca0.33MnO3, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Possible Magnetic separation in Ru doped La0.67Ca0.33MnO3 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-280546