Low temperature magnetic properties of layered compounds: NaLnTiO4 (Ln = Sm, Eu, Gd, Tb, Dy, Ho and Er)

A series of orthorhombic NaLnTiO4 (Ln = lanthanides) has been synthesized and characterized. These compounds all crystallize in A-site ordered n = 1 Ruddlesden–Popper phase (An+1BnO3n+1) structure. The weak ferromagnetism with large magnetization has been observed for Ln = Tb and Dy, and non-linear field dependence of magnetization without hysteresis has been observed for Ln = Er and Ho. By performing the symmetry operations, two possible canted spin arrangements have been proposed.