MnSb2O6: a polar magnet with a chiral crystal structure
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- MnSb2O6: a polar magnet with a chiral crystal structure
- Johnson, RD; Cao, K; Chapon, LC; Fabrizi, F; Perks, N; Manuel, P; Yang, JJ; Oh, Yoon Seok; Cheong, SW; Radaelli, PG
- Ab initio theoretical calculations; Axial vector; Ferroelectric switching; Heisenberg exchange interaction; Magnetic ground state; Multiferroics; Out-of-plane anisotropy; Structural chirality
- Issue Date
- AMER PHYSICAL SOC
- PHYSICAL REVIEW LETTERS, v.111, no.1, pp.017202 -
- Structural and magnetic chiralities are found to coexist in a small group of materials in which they produce intriguing phenomenologies such as the recently discovered Skyrmion phases. Here, we describe a previously unknown manifestation of this interplay in MnSb2O6, a trigonal oxide with a chiral crystal structure. Unlike all other known cases, the MnSb2O6 magnetic structure is based on corotating cycloids rather than helices. The coupling to the structural chirality is provided by a magnetic axial vector, related to the so-called vector chirality. We show that this unique arrangement is the magnetic ground state of the symmetric-exchange Hamiltonian, based on ab initio theoretical calculations of the Heisenberg exchange interactions, and is stabilized by out-of-plane anisotropy. MnSb2O6 is predicted to be multiferroic with a unique ferroelectric switching mechanism.
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