Strong magnetoelastic coupling at the transition from harmonic to anharmonic order in NaFe(WO) with 3d configuration
arXiv:1609.01849 · doi:10.1103/PhysRevB.94.104423
Abstract
The crystal structure of the double tungstate NaFe(WO) arises from that of the spin-driven multiferroic MnWO by inserting non-magnetic Na layers. NaFe(WO) exhibits a three-dimensional incommensurate spin-spiral structure at low temperature and zero magnetic field, which, however, competes with commensurate order induced by magnetic field. The incommensurate zero-field phase corresponds to the condensation of a single irreducible representation but it does not imply ferroelectric polarization because spirals with opposite chirality coexist. Sizable anharmonic modulations emerge in this incommensurate structure, which are accompanied by large magneto-elastic anomalies, while the onset of the harmonic order is invisible in the thermal expansion coefficient. In magnetic fields applied along the monoclinic axis, we observe a first-order transition to a commensurate structure that again is accompanied by large magneto-elastic effects. The large magnetoelastic coupling, a reduction of the lattice parameter, is thus associated only with the commensurate order. Upon releasing the field at low temperature, the magnetic order transforms to another commensurate structure that considerably differs from the incommensurate low-temperature phase emerging upon zero-field cooling. The latter phase, which exhibits a reduced ordered moment, seems to be metastable.
arXiv comment15 pages, accepted in Physical Review B
References in corpus (25)
- Spin current and magneto-electric effect in non-collinear magnets
- Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
- Ferroelectricity in spiral magnets
- Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
- Magnetic inversion symmetry breaking and ferroelectricity in TbMnO3
- Ferroelectricity in the Magnetic E-Phase of Orthorhombic Perovskites
- Ferroelectric polarization flop in a frustrated magnet MnWO induced by magnetic fields
- LiVO(Si,Ge)O, a prototype of a two-dimensional frustrated quantum Heisenberg antiferromagnet
- Origin of electromagnon excitations in \textit{R}MnO
- Perovskite Manganites Hosting Versatile Multiferroic Phases with Symmetric and Antisymmetric Exchange Strictions
- A New Multiferroic Material: MnWO4
- Magnetoelastic coupling in RETiO3 (RE = La, Nd, Sm, Gd, Y)
- Recent Progress of Multiferroic Perovskite Manganites
- Magnetic superspace groups and symmetry constraints in incommensurate magnetic phases
- Zero-field incommensurate spin-Peierls phase with interchain frustration in TiOCl
- Strong Magneto-elastic coupling in VOCl: Neutron and synchrotron powder x-ray diffraction study
- Thermal expansion and pressure effect in MnWO4
- Magnetic phase diagrams, domain switching and a quantum phase transition of the quasi-1D Ising-like antiferromagnet BaCo2V2O8
- Hysteresis effects in the phase diagram of multiferroic GdMnO
- Field dependence of magnetic correlations through the polarization flop transition in multiferroic TbMnO3 : evidence for a magnetic memory effect
- Origin of Multiferroicity in MnWO4
- Magnetic structure and magnon dispersion in LaSrFeO
- Magnetostrictive Neel ordering of the spin-5/2 ladder compound BaMn2O3: distortion-induced lifting of geometrical frustration
- Magnetic order and electromagnon excitations in DyMnO3 studied by neutron scattering experiments
- Stabilization of the multiferroic spin cycloid in NiVO by light Co-doping
Cited by in corpus (6)
- Cycloidal magnetism driven ferroelectricity in double tungstate LiFe(WO)
- Antiferromagnetism of Double Molybdate LiFe(MoO)
- New iron-based multiferroics with improper ferroelectricity
- Field-induced magnetic phase transitions and memory effect in bilayer ruthenate CaRuO with Fe substitution
- Structural dimerization in the commensurate magnetic phases of NaFe(WO) and MnWO
- Single-crystal investigations on the multiferroic material LiFe(WO)