Magnetic ordering of Fe in NCH5-intercalated iron phosphate Fe(OH)PO4

The magnetic properties of a novel organic templated layered material FeOHPO4(NCH5) have been studied via AC magnetic susceptibility, DC magnetization, and neutron diffraction measurements. Temperature dependencies of both the in-phase and out-of-phase components of the AC magnetic susceptibility display a sharp peak at 30 K, signifying the antiferromagnetic ordering of the Fe spins. Weak but definitive magnetic hysteresis was seen at temperatures below 30 K, suggesting the existence of a weak ferromagnetic component. Neutron magnetic diffraction measurements reveal a canted antiferromagnetic structure, that gives rise to a weak net ferromagnetic moment, with T-N approximate to 30 K and a saturated moment [mu(Z)] = 3.35(5)mu(B) for the Fe ions. (C) 2002 Elsevier Science B.V. All rights reserved.