Antiferromagnetism in the magnetoelectric effect single crystal LiMnPO$_4$

Jiying Li; Wei Tian; Ying Chen; Jerel L. Zarestky; Jeffrey W. Lynn; David Vaknin

doi:10.1103/PhysRevB.79.144410

Antiferromagnetism in the magnetoelectric effect single crystal LiMnPO$_4$

Strongly Correlated Electrons 2015-05-13 v1

Authors: Jiying Li , Wei Tian , Ying Chen , Jerel L. Zarestky , Jeffrey W. Lynn , David Vaknin

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Abstract

Elastic and inelastic neutron scattering studies reveal details of the antiferromagnetic tansition and intriguing spin-dynamics in the magneto-electric effect single crystal LiMnPO $_4$ . The elastic scattering studies confirm the system is antiferromagnetic (AFM) below $T_N$ =33.75 K with local magnetic moments (Mn $^{2+}$ ; $S = 5/2$ ) that are aligned along the crystallographic a-axis. The spin-wave dispersion curves propagating along the three principal axes, determined by inelastic scattering, are adequately modeled in the linear spin-wave framework assuming a spin-Hamiltonian that is parameterized by inter- and in-plane nearest- and next-nearest-neighbor interactions, and by easy-plane anisotropy. The temperature dependence of the spin dynamics makes this an excellent model many-body spin system to address the question of the relationship between spin-wave excitations and the order parameter.

Keywords

antiferromagnetism magnetoelectric effect LiMnPO4 neutron scattering spin dynamics spin-wave dispersion order parameter

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@article{arxiv.0904.2580,
  title  = {Antiferromagnetism in the magnetoelectric effect single crystal LiMnPO$_4$},
  author = {Jiying Li and Wei Tian and Ying Chen and Jerel L. Zarestky and Jeffrey W. Lynn and David Vaknin},
  journal= {arXiv preprint arXiv:0904.2580},
  year   = {2015}
}

Antiferromagnetism in the magnetoelectric effect single crystal LiMnPO$_4$

Abstract

Keywords

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