Analysis of magnetization and a spin state crossover in the multiferroic Ca${}_3$Co${}_{2-x}$Mn${}_x$O${}_6$

Abstract

Ca_3Co_{2-x}Mn_xO_6 (x ~ 0.96) is a multiferroic with spin-chains of alternating Co(2+) and Mn(4+) ions. The spin state of Co(2+) remains unresolved, due to a discrepancy between high temperature X-ray absorption (S=3/2) and low temperature neutron (S=1/2) measurements. Using a combination of magnetic modeling and crystal-field analysis, we show that the existing low temperature data cannot be reconciled within a high spin scenario by invoking spin-orbit or Jahn-Teller distortions. To unify the experimental results, we propose a spin-state crossover with specific experimental predictions.

4 pages, 3 figures

References in corpus (6)

• The spin state transition in LaCoO${}_3$; revising a revision
• Nature of magnetism in Ca${}_3$Co${}_2$O${}_6$
• Ising magnetism and ferroelectricity in Ca${}_3$CoMnO${}_6$
• Magnetic behaviour of quasi-one-dimensional oxides, Ca${}_3$Co${}_{(}1+x)$Mn${}_{1-x}$O${}_6$
• Interplay between Jahn-Teller instability, uniaxial magnetism and ferroelectricity in Ca3CoMnO6
• 3:1 magnetization plateau and suppression of ferroelectric polarization in an Ising chain multiferroic

Cited by in corpus (8)

• Formation of Magnetic Microphases in Ca${}_3$Co${}_2$O${}_6$
• Metamagnetic behavior and effect of field cooling on sharp magnetization jumps in multiferroic Y2CoMnO6
• Multiferroicity with coexisting isotropic and anisotropic spins in Ca${}_3$Co${}_{2-x}$Mn${}_x$O${}_6$
• Ferroelectricity of structural origin in spin-chain compounds Ca${}_3$Co${}_{2-x}$Mn${}_x$O${}_6$
• Universal metastability of the low-spin state in Co${}^{2+}$ systems: non-Mott type pressure-induced spin-state transition in CoCl${}_2$
• Topological solitons and bulk polarization switch in collinear type II multiferroics
• Microscopic model for magneto-electric coupling through lattice distortions
• Double frustration and magneto-electro-elastic excitations in collinear multiferroic materials