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arXiv · 0812.3801

3:1 magnetization plateau and suppression of ferroelectric polarization in an Ising chain multiferroic

Y. J. Jo·Seongsu Lee·E. S. Choi·H. T. Yi·W. Ratcliff II·Y. J. Choi·V. Kiryukhin·S. W. Cheong·L. Balicas
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Abstract

Ferroelectric Ising chain magnet Ca$_3$Co$_{2-x}$Mn$_x$O$_6$ ($x\simeq$0.96) was studied in magnetic fields up to 33 T. Magnetization and neutron scattering measurements reveal successive metamagnetic transitions from the zero-field $\uparrow \uparrow \downarrow \downarrow$ spin configuration to the $\uparrow \uparrow \uparrow \downarrow$ state with a broad magnetization plateau, and then to the $\uparrow \uparrow \uparrow \uparrow$ state. The absence of hysteresis in these plateaus reveals an intriguing coupling between the intra-chain state and the three-dimensional geometrically frustrated magnetic system. Inversion symmetry, broken in the $\uparrow \uparrow \downarrow \downarrow$ state, is restored in the $\uparrow \uparrow \uparrow \downarrow$ state, leading to the complete suppression of the electric polarization driven by symmetric superexchange.

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Y. J. Jo, Seongsu Lee, E. S. Choi, H. T. Yi, W. Ratcliff II, Y. J. Choi, V. Kiryukhin, S. W. Cheong, L. Balicas. 2008-12-19. 3:1 magnetization plateau and suppression of ferroelectric polarization in an Ising chain multiferroic. https://doi.org/10.1103/physrevb.79.012407

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