Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 638, Issue -, Pages 228-232Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.02.207
Keywords
Multiferroics; Dielectric relaxation; YMnO3
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Funding
- Stichting voor Fundamenteel Onderzoek der Materie' (FOM)
- TUBITAK [2232]
- ICREA Funding Source: Custom
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We have investigated the origin of the dielectric relaxation in YMnO3 single crystals. Two distinct dielectric relaxation features were observed at low (200 <= T <= 373 K) and high (300 <= T <= 450 K) temperatures. Analysis of our detailed frequency, electrode and thickness dependent dielectric measurements and ac conductivity data as well as the use of single crystals allow us to get a comprehensive picture of these relaxations. The low temperature relaxation is attributed to the Maxwell-Wagner type effects originating from the dipoles at the surface while the high temperature one is suggested to originate from hopping of charge carriers resulting from the second ionization of oxygen vacancies. (C) 2015 Elsevier B.V. All rights reserved.
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