Anomalous magnetic structure and spin dynamics in magnetoelectric
R Toft-Petersen, M Reehuis, TBS Jensen… - Physical Review B, 2015 - APS
Physical Review B, 2015•APS
We report significant details of the magnetic structure and spin dynamics of LiFePO 4
obtained by single-crystal neutron scattering. Our results confirm a previously reported
collinear rotation of the spins away from the principal b axis, and they determine that the
rotation is toward the a axis. In addition, we find a significant spin-canting component along
c. The possible causes of these components are discussed, and their significance for the
magnetoelectric effect is analyzed. Inelastic neutron scattering along the three principal …
obtained by single-crystal neutron scattering. Our results confirm a previously reported
collinear rotation of the spins away from the principal b axis, and they determine that the
rotation is toward the a axis. In addition, we find a significant spin-canting component along
c. The possible causes of these components are discussed, and their significance for the
magnetoelectric effect is analyzed. Inelastic neutron scattering along the three principal …
We report significant details of the magnetic structure and spin dynamics of obtained by single-crystal neutron scattering. Our results confirm a previously reported collinear rotation of the spins away from the principal axis, and they determine that the rotation is toward the axis. In addition, we find a significant spin-canting component along . The possible causes of these components are discussed, and their significance for the magnetoelectric effect is analyzed. Inelastic neutron scattering along the three principal directions reveals a highly anisotropic hard plane consistent with earlier susceptibility measurements. Using a spin Hamiltonian, we show that the spin dimensionality is intermediate between - and Ising-like, with an easy axis and a hard axis. It is shown that both next-nearest neighbor exchange couplings in the plane are in competition with the strongest nearest neighbor coupling.
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