Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/1917
Title: Capacitive and magnetoresistive origin of magnetodielectric effects in Sm-substituted spiral antiferromagnet BiMnFe2O6
Authors: Ghara, Somnath
Yoo, Kyongjun
Kim, Kee Hoon
Sundaresan, A.
Keywords: Applied Physics
Multiferroics
1st Order
Issue Date: 2015
Publisher: American Institute of Physics
Citation: Journal of Applied Physics
118
16
Ghara, S.; Yoo, K.; Kim, K. H.; Sundaresan, A., Capacitive and magnetoresistive origin of magnetodielectric effects in Sm-substituted spiral antiferromagnet BiMnFe2O6. Journal of Applied Physics 2015, 118 (16), 5.
Abstract: BiMnFe2O6 exhibits a spiral antiferromagnetic ordering below 212K and a reentrant spin glass transition at 34 K. Further, magnetic and dielectric anomalies occur at the same temperature (T = 170 K) with a significant magnetodielectric effect. Upon substitution of Sm3+ for Bi3+ ions in Bi1-xSmxMnFe2O6 (x = 0.1 and 0.2), the dielectric anomaly shifts to low temperatures (T = 135 and 72 K, respectively), whereas the magnetic anomaly develops into a weak ferromagnetism. For x = 0.2, the weak ferromagnetism occurs in a wide temperature range (90-201 K). Below 90 K, it undergoes a transition to an antiferromagnetic state. In contrast to the parent compound (x = 0), the magnetodielectric effect is observed both in the antiferromagnetic region (T < 90 K) with a maximum at the dielectric anomaly (72 K) and also in the weak ferromagnetic region. It has been shown that the magnetodielectric effect in the antiferromagnetic region has an intrinsic capacitive origin while that observed at the weak ferromagnetic region originates from magnetoresistance. (C) 2015 AIP Publishing LLC.
Description: Restricted access
URI: http://hdl.handle.net/10572/1917
ISSN: 0021-8979
Appears in Collections:Research Articles (Sundaresan A.)

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