Structural phase transition in the two-dimensional triangular lattice antiferromagnetRbFe(MoO4)2

AAg2M[VO4]2Möller1, Amuneke2, Daniel3 et al. 2012Phys. Rev. B381480View full textAdd to dashboardCite

“…[8][9][10] Therefore it remains an interesting challenge for preparative chemists to identify new classes of model materials. Experimentally studied examples of the frustrated 2D cases are scarce with prominent, intriguing compounds such as NiGa 2 S 4 , 11 RbFe[MoO 4 ] 2 , [12][13][14] CuFeO 2 , 15 or AM 3 (OH) 6 (SO 4 ) 2 -the jarosite type of compounds. [16][17][18] Here, we present a class of materials where a reduction of the dimensionality of a system can be achieved by using "chemical scissors," such as nonmagnetic large counter ions (e.g., A 2+ = Sr or Ba), see Fig.…”

Observation of a ferro-rotational order coupled with second-order nonlinear optical fields

“…It undergoes a structural phase transition at Tc ~195 K with octahedra (tetrahedra) rotating counterclockwise (clockwise) about the c axis for domain type I and vice versa for domain type II. The point group of the room temperature phase of RbFe(MoO4)2 is known to be 3 ̅ , while that for the low temperature structural phase is likely to be 3 ̅ but with a couple of other options including 3 and 32 16,28,30 (see sample growth details in Methods).…”

“…x-ray diffraction 30 to distinguish the subtle differences between point groups 3 , 32, and 3 ̅ . The 3 point group is immediately disqualified because the departure of the RA patterns from the mirror planes at room temperature indicates the absence of mirror symmetries below Tc.…”

Phase formation features in the systems M2MoO4–Fe2(MoO4)3 (M=Rb, Cs) and crystal structures of new double polymolybdates M3FeMo4O15

“…Double molybdates MFe(MoO 4 ) 2 (M=Na, K, Rb) exhibit interesting ferroelastic and antiferromagnetic properties [10][11][12][13][14], and Li 3 Fe(MoO 4 ) 3 is considered as a possible positive electrode in lithium cells [16,17]. However, despite detail characterization and attractive functional properties of some double iron(III) molybdates, none T-x diagrams have been constructed for the systems M 2 MoO 4 -Fe 2 (MoO 4 ) 3 (M=Li, Na, K, Rb, Cs) and only lithium and sodium containing systems were studied using X-ray diffraction [7].…”

“…Double molybdates MFe(MoO 4 ) 2 (M= Li-Cs), M 3 Fe(MoO 4 ) 3 (M =Li, K), M 5 Fe(MoO 4 ) 4 (M= K, Rb, Cs) [7][8][9][10][11][12][13][14][15][16][17][18][19] were described in literature; the crystal structures of MFe(MoO 4 ) 2 (M= Li, Na, K, Rb) [20][21][22][23][24][25], Li 3 Fe(MoO 4 ) 3 [26] and Rb 5 Fe(MoO 4 ) 4 [20] were determined. In the structures, the molybdenum atoms are tetrahedrally coordinated while the Fe 3 + cations usually have the octahedral coordination excluding the structure of the low-temperature Rb 5 Fe(MoO 4 ) 4 [20] where the iron atoms are located in square pyramids.…”