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| Title: | Solution sol–gel processing and investigation of percolation threshold in La2/3Ca1/3MnO3:xSiO2 nanocomposite |
| Authors: | DAS, D
CHOWDHURY, P
DAS, RN
SRIVASTAVA, CM
NIGAM, AK
BAHADUR, DHIRENDRA |
| Keywords: | crystal lattices
lanthanum compounds
synthesis (chemical)
electric conductivity
percolation (solid state) |
| Issue Date: | 2002 |
| Publisher: | Elsevier |
| Citation: | Journal of Magnetism and Magnetic Materials 238(2-3), 178-184 |
| Abstract: | The composites of La2/3Ca1/3MnO3:xSiO2 (0less-than-or-equals, slantxless-than-or-equals, slant0.40) have been synthesized by sol–gel technique to derive homogeneous nanocomposites. Si4+ by virtue of its strong preference for tetrahedral site does not enter the perovskite lattice. The percolation threshold composition has been determined by resistivity measurements at around 90% volume fraction of LCMO. A detailed electrical, magnetic and magneto-transport characterizations have been carried out for composites around the threshold composition (x=0.05,0.10,0.15). The magnetoresistance results at 1 T show a sharp peak at Tc and a minimum just below Tc as reported in several polycrystalline LCMO composites. |
| URI: | 10.1016/S0304-8853(01)00859-9
http://hdl.handle.net/10054/1390
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1390 |
| ISSN: | 0304-8853 |
| Appears in Collections: | Article
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