EPR study on the role of Mn in enhancing PTC of BaTiO3
Data(s) |
01/04/1985
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Resumo |
Low concentration of Mn (< 0.05 atom%) added to lanthanide-doped ceramics for enhancing the PTC effect did not show any EPR signal due to Mn in the tetragonal phase. Above Tc (400 K) it showed the six-line signal arising from Mn2+. This is explained on the basis of Mn existing as Mn3+ ion with short relaxation time at room temperature. Oxidation state changes to Mn2+ above Tc; thus Mn3+ acts as an electron trap. This augments the function of activated defect centres (VBa /ag VBa) in diminishing the charge carrier concentration across the phase transformation. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/20940/1/231.pdf Kutty, TRN and Murugaraj, P (1985) EPR study on the role of Mn in enhancing PTC of BaTiO3. In: Materials Letters, 3 (5-6). pp. 195-199. |
Publicador |
Elsevier Science |
Relação |
http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TX9-48HXYD2-X-1&_cdi=5585&_user=512776&_orig=search&_coverDate=04%2F30%2F1985&_sk=999969994&view=c&wchp=dGLzVtz-zSkWA&md5=04476435bdf8ea4f89af4c63f83997a7&ie=/sdarticle.pdf http://eprints.iisc.ernet.in/20940/ |
Palavras-Chave | #Materials Research Centre |
Tipo |
Journal Article PeerReviewed |