Antiferromagnetism in the magnetoelectric effect single crystal LiMnPO4
| Title | Antiferromagnetism in the magnetoelectric effect single crystal LiMnPO4 |
| Publication Type | Journal Article |
| Year of Publication | 2009 |
| Authors | Li JY, Tian W, Chen Y, Zarestky JL, Lynn JW, Vaknin D |
| Journal Title | Physical Review B |
| Volume | 79 |
| Pages | 144410 |
| Date Published | 04/01 |
| ISBN Number | 1098-0121 |
| Accession Number | ISI:000265943200072 |
| Keywords | antiferromagnetic materials, lifepo4, linipo4, lithium compounds, magnetic anisotropy, magnetic transitions, magnetic-properties, magnetoelectric effects, manganese compounds, spin dynamics, spin hamiltonians, spin waves, temperature, weak ferromagnetism |
| Abstract | Elastic and inelastic neutron-scattering studies reveal details of the antiferromagnetic transition and intriguing spin dynamics in the magnetoelectric effect single crystal LiMnPO4. The elastic-scattering studies confirm that the system is antiferromagnetic below T-N=33.75 K with local magnetic moments (Mn2+; 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 parametrized 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. |
| URL | <Go to ISI>://000265943200072 |
| DOI | 10.1103/Physrevb.79.144410 |
