Structure and magnetism in BaLaMnO 4 +/− δ ( δ = 0.00, 0.10) and Ba x Sr 1 − x LaMnO 4 . Disappearance of magnetic order for x > 0.30.

Polycrystalline samples of BaLaMnO4, oxygen deficient and oxygen excess BaLaMnO4 ± δ and the solid solution BaxSr1 − xLaMnO4 have been prepared and investigated. Magnetic susceptibility, powder X-ray diffraction and variable temperature powder neutron diffraction data are presented for these compounds. BaLaMnO4 and BaLaMnO3.89 crystallize in space group I4/mmm with unit cell constants a = 3.90252(6) Å, c = 13.2660(3) Å and a = 3.9089(1) Å, c = …