Quasi-two-dimensional noncollinear magnetism in the Mott insulator Sr2F2Fe2OS

Liang Zhao

¹

,

Shu Qi Wu

²

,

Jiakui K. Wang

³

et al.

Crystal field excitations and magnons: Their roles in oxyselenides Pr2O2M2OSe2(

“…This is consistent with electrical resistivity measurements [9][10][11] and suggests that these "Fe 2 O" materials provide a suitable Mott-insulating reference system in which to study the exchange interactions and anisotropy in layered mixed-anion phases [12].…”

Weak spin interactions in Mott insulating La2O2Fe2OSe2McCabe1, Stock2, Rodriguez3 et al. 2014Phys. Rev. B4527630View full textAdd to dashboardCite

“…2) and collinear spin models give indistinguishable fits. In contrast to the report on Sr 2 F 2 Fe 2 OS 2 , there is no difference in the magnitude of Fe moments for these two models [28]. The magnetic Bragg reflections observed for La 2 O 2 Fe 2 OSe 2 are anisotropically broadened similarly to Sr 2 F 2 Fe 2 OS 2 , suggesting that both have similar magnetic microstructures.…”

“…1(c)] can, to a first approximation, be described by the spin Hamiltonian involving single-ion anisotropies and Heisenberg terms with AFM J 1 and J 2 and FM J 2 , consistent with calculations [28] [27,30,41]. However, in the 2-k model, the J 1 interactions are unimportant as nearest-neighbor moments are perpendicular.…”

Structural and magnetic characterization of iron oxyselenidesCe2O2Fe2OSe2andMcCabe1, Wills2, Chapon3 et al. 2014Phys. Rev. B129260View full textAdd to dashboardCite

“…This has led to much research into the interplay between transition metal and lanthanide magnetic sublattices in these and related mixed-anion systems [7][8][9][10][11][12][13][14][15][16][17][18][19] [23] and a collinear model [10,22]. Recent work suggests that the 2-k model is the more likely [24][25][26]. In this magnetic structure (Fig.…”