Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-12-19
Physics
Condensed Matter
Strongly Correlated Electrons
accepted for publication as a Brief Report in Physical Review B
Scientific paper
10.1103/PhysRevB.79.012407
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.
Balicas Luis
Cheong Sang-Wook
Choi Eun Sang
Choi Youn-Jun
II William Ratcliff
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