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Detail study of impedance parameters shows the non-Debye temperature of relaxation phenomena in the system. This analysis enables us to separate grain and grain boundary contribution of the materials. Above the ferroelectric\u2013paraelectric phase transition temperature, the electrical conduction is governed by the thermal excitation of carriers from oxygen vacancies exhibiting Negative temperature coefficient (NTCR) behaviour.<\/jats:p>","DOI":"10.1063\/1.3660267","type":"journal-article","created":{"date-parts":[[2011,11,17]],"date-time":"2011-11-17T23:33:11Z","timestamp":1321572791000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":39,"title":["Investigation of dielectric and electrical properties of Mn doped sodium potassium niobate ceramic system using impedance spectroscopy"],"prefix":"10.1063","volume":"110","author":[{"given":"Rashmi","family":"Rani","sequence":"first","affiliation":[{"name":"Ferroelectric Research Laboratory, Department of Physics, A N College 1 , Patna 800013, India"}]},{"given":"Seema","family":"Sharma","sequence":"additional","affiliation":[{"name":"Ferroelectric Research Laboratory, Department of Physics, A N College 1 , Patna 800013, India"}]},{"given":"Radheshyam","family":"Rai","sequence":"additional","affiliation":[{"name":"Department of Ceramics and Glass Engineering and CICECO, University of Aveiro 2 , 3810-193 Aveiro, Portugal"}]},{"given":"Andrei L.","family":"Kholkin","sequence":"additional","affiliation":[{"name":"Department of Ceramics and Glass Engineering and CICECO, University of Aveiro 2 , 3810-193 Aveiro, Portugal"}]}],"member":"317","published-online":{"date-parts":[[2011,11,17]]},"reference":[{"volume-title":"Piezoelectric Ceramics\u2014Properties and Application","year":"1991","key":"2023070100270903000_c1"},{"volume-title":"Piezoelectric Ceramics","year":"1971","key":"2023070100270903000_c2"},{"key":"2023070100270903000_c3","doi-asserted-by":"publisher","first-page":"2680","DOI":"10.1143\/JJAP.39.2680","volume":"39","year":"2000","journal-title":"Jpn. 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