Effects of Mn-doping on TSDC and degradation of BaTiO sub(3)

The effects of Mn-doping on TSDC (Thermally Stimulated Depolarization Current) and electrical degradation of BaTiO sub(3) have been investigated. TSDCs of un-doped BaTiO sub(3) and Ba(Ti sub(1-x)Mn sub(x))O sub(3-δ ) exhibited the three sharp TSDC peaks around phase transition temperatures. TSDC of Ba(Ti sub(0.995)Mg sub(0.005))O sub(2.995) increased gradually from 50 super()C and this anomalous depolarization current kept going up well above the Curie temperature (130 super()C). TSDCs of un-doped BaTiO sub(3) and Ba(Ti sub(0.995)Mn sub(0.005))O sub(3- delta ) decreased in the temperature range above the Curie point, whereas a slight increase in TSDC was confirmed at the specimen of Ba(Ti sub(0.99)Mn sub(0.01))O sub(3- delta ). TSDCs of Ba(Ti sub(0.995-y) Mg sub(0.005)Mn sub(y))O sub(3- delta ) (y = 0.005, 0.01) were lower than that of Ba(Ti sub(0.995)Mg sub(0.005))O sub(2.995).