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Neutron Scattering Studies of LiCoPO4 & LiMnPO4

Published

Author(s)

W. Tian, Jiying Li, Haifeng Li, Jeffrey W. Lynn, J. L. Zarestky, David Vaknin

Abstract

LiCoPO4 (TN approximately equal) 21.8 K ) & LiMnPO4 (TN approximately equal} 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 LiMnPO4 behaves like a quasi-2D material and that the single ion anisotropy in LiCoPO4 is comparable to the nearest-neighbor magnetic exchange interaction rendering Ising-type behavior of LiCoPO4. Neutron diffraction studies of LiMnPO4 in applied magnetic fields reveal a spin-flop transition at - 3.5 Tesla with characteristics of a second order phase transition.
Citation
Journal of Physics Conference Proceedings
Volume
251

Keywords

Phonons, multiferroic, magnetic order, spin waves, phase transition, neutron scattering, magnetic field, temperature dependence

Citation

Tian, W. , Li, J. , Li, H. , Lynn, J. , Zarestky, J. and Vaknin, D. (2009), Neutron Scattering Studies of LiCoPO<sub>4</sub> & LiMnPO<sub>4</sub>, Journal of Physics Conference Proceedings, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=902960 (Accessed April 13, 2024)
Created June 8, 2009, Updated October 12, 2021