Crystal structure and luminescent properties of two lithium lanthanide tungstate LiLn(WO4)2 (Ln = Sm, Eu)

Incommensurate–commensurate magnetic phase transition in double tungstate Li2Co(WO4)2

“…[29] Meanwhile, another family of double tungstates A I B III (WO 4 ) 2 (A = alkali metal, B = trivalent cation or rare-earth element) has also been extensively studied. [30][31][32][33][34] Similar to Li 2 Co(WO 4 ) 2 , LiFe(WO 4 ) 2 also undergoes two sequential AFM phase transitions. [32] Interestingly, LiFe(WO 4 ) 2 was confirmed as a type-II multiferroic material.…”

Antiferromagnetism of Double Molybdate LiFe(MoO4)2

“…Double tungstates and molybdates with the chemical formula A I B III (MO 4 ) 2 form a big family of transition metal oxides, where A is an alkali metal; B is a trivalent cation such as Bi 3+ , In 3+ , or Fe 3+ or a rare earth, Sm 3+ or Eu 3+ ; and M represents W 6+ or Mo 6+ . − The combinations of three categories of metal ions make this family full of varieties in physics and functionality. The inclusion of the Li ion at A site makes them suitable to be used in lithium-ion batteries as anode materials, while the W/Mo can provide a relative large spin–orbit coupling considering its 4d/5d orbitals. ,− Most importantly, the B-site ions with narrow bands can provide other applicable physical properties, such as magnetism and luminescence. − …”