Mondal, P and Bhattacharya, Dipten and Choudhury, Pranab and Mandal, Prabhat (2007) Dielectric anomaly at T(N) in LaMnO(3) as a signature of coupling between spin and orbital degrees of freedom. Physical Review B, 76 (17). Article No.-172403. ISSN 1098-0121

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We observe a distinct anomaly in dielectric permittivity (epsilon(')) as well as relaxation time (tau(0)) versus temperature (T) pattern at the antiferromagnetic transition point T(N) in a single crystal of LaMnO(3). The equivalent circuit analysis of the impedance spectra across T(N) reveals a clear anomaly in the capacitive component C(0) at T(N). Since no structural transition takes place across T(N), the anomaly in tau(0) and C(0) at T(N) possibly signifies multiferroicity stemming from coupling between orbital and spin order in LaMnO(3).

Item Type: Article
Subjects: Electronics
Depositing User: Namita Dutta
Date Deposited: 23 Jan 2012 12:55
Last Modified: 05 Mar 2012 10:04

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