The magnetic structure and spin-flop transition in the A-site columnar-ordered quadruple perovskite $\mathrm{TmM}{\mathrm{n}}_3{\mathrm{O}}_6$

Abstract

We present the magnetic structure of $\mathrm{TmM}{\mathrm{n}}_3{\mathrm{O}}_6$, solved via neutron powder diffraction - the first such study of any $R\mathrm{M}{\mathrm{n}}_3{\mathrm{O}}_6$ A-site columnar-ordered quadruple perovskite to be reported. We demonstrate that long range magnetic order develops below 74 K, and at 28 K a spin-flop transition occurs driven by $f$-$d$ exchange and rare earth single ion anisotropy. In both magnetic phases the magnetic structure may be described as a collinear ferrimagnet, contrary to conventional theories of magnetic order in the manganite perovskites. Instead, we show that these magnetic structures can be understood to arise due to ferro-orbital order, the A, A${}^{\prime }$ and A${}^{\prime \prime }$ site point symmetry, $mm2$, and the dominance of A-B exchange over both A-A and B-B exchange, which together are unique to the $R\mathrm{M}{\mathrm{n}}_3{\mathrm{O}}_6$ perovskites.

arXiv comment11 pages, 5 figures

References in corpus (6)

• Giant improper ferroelectricity in the ferroaxial magnet CaMn7O12
• Evidence for large electric polarization from collinear magnetism in TmMnO3
• Synthesis and characterization of multiferroic BiMn${}_7$O${}_{12}$
• Modulated spin helicity stabilized by incommensurate orbital density waves in a quadruple perovskite manganite
• Universal magneto-orbital ordering in the divalent $A$-site quadruple perovskite manganites $A$Mn${}_7$O${}_{12}$ ($A$ = Ca, Sr, Cd, and Pb)
• Evolution of magneto-orbital order upon B-site electron doping in Na1-xCaxMn7O12 quadruple perovskite manganites

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• Magnetic inhomogeneities in the quadruple perovskite manganite [Y${}_{2-x}$Mn${}_x$]MnMnMn${}_4$O${}_{12}$