Neutron Scattering Studies of LiCoPO4 & LiMnPO4

TitleNeutron Scattering Studies of LiCoPO4 & LiMnPO4
Publication TypeBook Chapter
Year of Publication2010
AuthorsTian W, Li JY, Li HF, Lynn JW, Zarestky JL, Vaknin D, Iop
Book TitleInternational Conference on Neutron Scattering 2009
PublisherIop Publishing Ltd
Series TitleJournal of Physics Conference Series
ISBN Number1742-6588
Accession NumberWOS:000291982100005

LiCoPO(4) (T(N) approximate to 21.8 K) & LiMnPO(4) (T(N) approximate to 34 K) are antiferromagnetic insulators exhibiting large magnetoelectric effects. We performed inelastic neutron scattering (INS) experiments to investigate the spin dynamics of these systems and analyzed the measured magnetic spectra by linear spin-wave theory, taking into account intra- and inter-plane nearest, next nearest neighbor magnetic exchange interactions and single ion anisotropy, The INS results indicate that the single ion anisotropy in LiCoPO(4) is comparable to the nearest-neighbor magnetic exchange interaction rendering Ising-type behavior of LiCoPO(4). Neutron diffraction studies of LiMnPO(4) in applied magnetic fields reveal a spin-flop transition at similar to 3.5 Tesla with characteristics of a second order phase transition.