Canted antiferromagnetism in KNi 3 [PO 3 (F,OH)] 2 [PO 2 (OH) 2 ]F 2 with a stair-case Kagomé lattice

Ba4Ni3F14·H2O: a ferrimagnetic compound with a staircase kagomé lattice

“…For S = 1 kagomé systems, some compounds such as YCa 3 (VO) 3 (BO 3 ) 4 , 13 (CH 3 NH 3 ) 2 NaV 3 F 12 , 14 BaNi 3 (VO 4 ) 2 (OH) 2 , 15 KNi 3 [PO 3 (F,OH)] 2 [PO 2 (OH) 2 ]F 2 , 16 and Ni 3 V 2 O 8 17 have also been synthesized and investigated, where YCa 3 (VO) 3 (BO 3 ) 4 shows a possible QSL ground state, 13 while (CH 3 NH 3 ) 2 NaV 3 F 12 14 and BaNi 3 (VO 4 ) 2 (OH) 2 15 show likely a spin-glassy behavior. However, both KNi 3 [PO 3 (F,OH)] 2 [PO 2 (OH) 2 ]F 2 16 and Ni 3 V 2 O 8 17 are found to exhibit a staircase kagomé structure, where KNi 3 [PO 3 (F,OH)] 2 [PO 2 (OH) 2 ]F 2 shows a canted antiferromagnetic ordering at low temperatures, 16 while Ni 3 V 2 O 8 shows field-induced magnetic transitions, 18 a complicated magnetic phase diagram, 19,20 and magnetically driven ferroelectric order. 21 Clearly, the S = 1 kagomé compounds also have interesting magnetic phenomena.…”

“…Overall, oxides and sulfides such as Ni 3 V 2 O 8 17 and A 2 Ni 3 S 4 (A = K, Rb, Cs) 22 are usually obtained by a high-temperature solid state reaction, while the compounds containing –OH or H 2 O are often synthesized by a hydrothermal method, including ZnCu 3 (OH) 6 Cl 2 , 2 [C 3 H 5 N 2 ][V 9 O 6 F 24 (H 2 O) 2 ], 5 BaCu 3 (VO 4 ) 2 (OH) 2 , 6 Cu 3 V 2 O 7 (OH) 2 ·2H 2 O, 7 and KNi 3 [PO 3 (F,OH)] 2 [PO 2 (OH) 2 ]F 2 . 16 In some cases, new kagomé compounds can also be explored through the element replacement, where such typical examples can be seen in ZnCu 3 (OH) 6 Cl 2 family 2,8–10 and BaCu 3 (VO 4 ) 2 (OH) 2 series. 6,15 Moreover, it has been suggested that the hydrothermal method is quite essential and effective for the explorations of kagomé compounds.…”

“…For S = 1 kagome ´systems, some compounds such as YCa 3 (VO) 3 (BO 3 ) 4 , 13 (CH 3 NH 3 ) 2 NaV 3 F 12 , 14 BaNi 3 (VO 4 ) 2 (OH) 2 , 15 16 while Ni 3 V 2 O 8 shows field-induced magnetic transitions, 18 a complicated magnetic phase diagram, 19,20 and magnetically driven ferroelectric order. 21 Clearly, the S = 1 kagome ´compounds also have interesting magnetic phenomena.…”

“…21 Clearly, the S = 1 kagome ´compounds also have interesting magnetic phenomena. 16 In some cases, new kagome ´compounds can also be explored through the element replacement, where such typical examples can be seen in ZnCu 3 (OH) 6 Cl 2 family 2,8-10 and BaCu 3 (VO 4 ) 2 (OH) 2 series. 6,15 Moreover, it has been suggested that the hydrothermal method is quite essential and effective for the explorations of kagome ´compounds.…”

“…KNi 3 [PO 3 (F,OH)] 2 [PO 2 (OH) 2 ]F 2 ,16 and Ni 3 V 2 O 817 have also been synthesizedand investigated, where YCa 3 (VO) 3 (BO 3 ) 4 shows a possible QSL ground state,13 while (CH 3 NH 3 ) 2 NaV 3 F 1214 and BaNi 3 (VO 4 )…”