Antiferromagnetism in the magnetoelectric effect single crystal LiMnPO${}_4$

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.

References in corpus (5)

• Commensurate-Incommensurate Magnetic Phase Transition in Magnetoelectric Single Crystal LiNiPO${}_4$
• Spin-waves in antiferromagnetic single crystal LiFePO${}_4$
• Field-induced magnetic phases and electric polarization in LiNiPO4
• Spin Dynamics in the Magnetoelectric Effect LiCoPO${}_4$ Compound
• Anomalous spin-waves and the commensurate-incommensurate magnetic phase transition in LiNiPO4

Cited by in corpus (8)

• High-pressure optical floating-zone growth of Li(Mn,Fe)PO${}_4$ single crystals
• Magnetic order, hysteresis and phase coexistence in magnetoelectric LiCoPO${}_4$
• Tweaking the spin-wave dispersion and suppressing the incommensurate phase in LiNiPO${}_4$ by iron substitution
• Experimental evidence for the coupling of Li-motion and structural distortions in LiMnPO${}_4$
• The origin of ferromagnetic interactions in NaMnCl${}_3$: how the response theory reconciles with Goodenough-Kanamori-Anderson rules
• Evaluating SCAN and r${}^2$SCAN meta-GGA functionals for predicting transition temperatures in antiferromagnetic materials
• Exceptional field dependence of antiferromagnetic magnons in LiFePO${}_4$
• Magnetic structure and properties of a vanthoffite mineral Na6Mn(SO4)4