Factors Governing the Propagation Direction and Spin-Rotation Plane of Noncollinear Magnetic Structures: A Helix vs Cycloid in Doubly Ordered Perovskites NaYMnWO6and NaYNiWO6

Ravi Shankar P N, Fabio Orlandi, Pascal Manuel, Hyun Joo Koo, Myung Hwan Whangbo, Athinarayanan Sundaresan

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The magnetic structure of NaYMnWO6 was determined by neutron powder diffraction measurements. Below 9 K, the magnetic structure is a helix to wave vector k = (0, 0.447, 1/2), in contrast with NaYNiWO6, which shows a transverse spin density wave with k = (0.47, 0, 0.49). By analyzing the differences in the spin exchanges of NaYMnWO6 and NaYNiWO6, and in the magnetic anisotropies of the Mn2+ (d5, S = 5/2) and the Ni2+ (d2, S = 1) ions, we show what factors govern the propagation direction of a noncollinear magnetic structure and whether it becomes a helix or a cycloid.

Original languageEnglish
Pages (from-to)15124-15127
Number of pages4
JournalInorganic Chemistry
Volume60
Issue number20
DOIs
Publication statusPublished - 18 Oct 2021

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