Nonlinear magnetoelectric effect in paraelectric state of Co4Nb2O9 single crystal. Issue 1 (December 2017)

• Record Type: Journal Article
• Authors: Cao, Yiming; Deng, Guochu; Beran, Přemysl; Feng, Zhenjie; Kang, Baojuan; Zhang, Jincang; Guiblin, Nicolas; Dkhil, Brahim; Ren, Wei; Cao, Shixun
• Is Part Of: Scientific reports. Volume 7:Issue 1(2017)
• Page Start: 1
• Page End: 7
• Publication Date: 2017-12
• Subjects: Natural history -- Research -- Periodicals; Biology -- Research -- Periodicals; Physical sciences -- Research -- Periodicals; Earth sciences -- Research -- Periodicals; Environmental sciences -- Research -- Periodicals; 502.85
• DOI: 10.1038/s41598-017-14169-3
• Languages: English
• ISSNs: 2045-2322

Abstract

Abstract We report the structural, magnetoelectric (ME), magnetic and electric control of magnetic properties in Co4 Nb2 O9 (CNO) single crystal. A detailed ME measurement reveals a nonlinear ME effect instead of a linear ME effect in CNO single crystal. By fitting the magnetization-electric field (M-E) curve, it can be found that the linear ( $${\alpha }_{e}$$ α e ) and quadratic (γ) coefficients equal to ~8.27 ps/m and ~−6.46 ps/MV for upper branch, as well as ~8.38 ps/m and ~6.75 ps/MV for the lower branch. More importantly, a pronounced response was observed under a small cooling magnetic field, which cannot even cause the spin flop. This suggests a magnetoelectric effect can occur at paraelectric state for CNO single crystal. Furthermore, we also found that the magnetization of every axis responds to electric field applied alonga -axis, but fails to do so when the electric field is appliedc -axis. Such findings supply a direct evidence to the magnetic structure and ME coupling mechanism indirectly reflected by our neutron experiment.