Neutron Scattering Studies of LiCoPO4 & LiMnPO4

Published

June 9, 2009

Author(s)

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

Abstract

LiCoPO₄ (T_N approximately equal) 21.8 K ) & LiMnPO₄ (T_N 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

Pub Type

Journals

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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 LiCoPO₄ & LiMnPO₄, Journal of Physics Conference Proceedings, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=902960 (Accessed January 18, 2025)