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Magnetic structure
About: Magnetic structure is a research topic. Over the lifetime, 10787 publications have been published within this topic receiving 207143 citations.
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TL;DR: In this article, the multiferroic behavior of MnWO4, a magnetic oxide with monoclinic crystal structure and spiral long-range magnetic order, was investigated.
Abstract: We report the multiferroic behaviour of MnWO4, a magnetic oxide with monoclinic crystal structure and spiral long-range magnetic order. Based upon recent theoretical predictions, MnWO4 should exhibit ferroelectric polarization coexisting with the spiral magnetic structure. We have confirmed the multiferroic state below 13 K by observing a finite electrical polarization in the magnetically ordered state via pyroelectric current measurements.
116 citations
TL;DR: High-resolution neutron diffraction and inelastic neutron scattering experiments in the frustrated multiferroic hexagonal compounds RMnO_{3} (R = Ho,Yb,Sc,Y), which provide evidence of a strong magnetoelastic coupling in the whole family.
Abstract: We have performed high-resolution neutron diffraction and inelastic neutron scattering experiments in the frustrated multiferroic hexagonal compounds RMn0 3 (R = Ho, Yb, Sc, Y), which provide evidence of a strong magnetoelastic coupling in the whole family. We can correlate the atomic positions, the type of magnetic structure, and the nature of the spin waves whatever the R ion and temperature. The key parameter is the position of the Mn ions in the unit cell with respect to a critical threshold of 1/3, which determines the sign of the coupling between Mn triangular planes.
116 citations
TL;DR: In this paper, the authors investigated the ground state and finite temperature properties of the half-filled Hubbard model on a honeycomb lattice using quantum Monte Carlo and series expansion techniques.
Abstract: We investigate ground state and finite temperature properties of the half-filled Hubbard model on a honeycomb lattice using quantum Monte Carlo and series expansion techniques. Unlike the square lattice, for which magnetic order exists at $T=0$ for any nonzero $U$, the honeycomb lattice is known to have a semimetal phase at small $U$ and an antiferromagnetic one at large $U$. We investigate the phase transition at $T=0$ by studying the magnetic structure factor and compressibility using quantum Monte Carlo simulations and by calculating the sublattice magnetization, uniform susceptibility, spinwave, and single hole dispersion using series expansions around the ordered phase. Our results are consistent with a single continuous transition at ${U}_{c}∕t$ in the range 4--5. Finite-temperature signatures of this phase transition are seen in the behavior of the specific heat, $C(T)$, which changes from a two-peaked structure for $Ug{U}_{c}$ to a one-peaked structure for $Ul{U}_{c}$. Furthermore, the $U$ dependence of the low temperature coefficient of $C(T)$ exhibits an anomaly at $U\ensuremath{\approx}{U}_{c}$.
116 citations
116 citations
TL;DR: In this paper, the properties of the perovskites NdBaCo 2 O 5+ δ have been studied as a function of temperature by neutron powder diffraction and long-range G-type antiferromagnetic order is realized for all samples apart from that with δ = 0.5.
116 citations