Temperature-Dependent Cycloidal Magnetic Structure in GdRuAl Studied by Resonant X-ray Diffraction
arXiv:1708.03086 · doi:10.7566/JPSJ.86.094709
Abstract
We have performed resonant X-ray diffraction experiments on the antiferromagnet GdRuAl and have clarified that the magnetic structure in the ordered state is cycloidal with the moments lying in the plane and propagating along the axis. The propagation vector shows a similar temperature dependence to the magnetic order parameter, which can be interpreted as being associated with the gap opening in the conduction band and the resultant change in the magnetic exchange interaction. Although the state of Gd is almost isotropic, the moments show slight preferential ordering along the axis. The axis component in the cycloid develops with decreasing temperature through a tiny transition in the ordered phase. We also show that the scattering involves the - process, which is forbidden in normal - resonance of magnetic dipole origin. We discuss the possibility of the - resonance originating from a toroidal moment due to the lack of inversion symmetry at the Gd site. The spin-flop transition in a magnetic field is also described in detail.
arXiv comment8 pages, 11 figures, accepted for publication in J. Phys. Soc. Jpn
References in corpus (14)
- Novel phase transition and the pressure effect in YbFe2Al10-type CeT2Al10 (T=Fe, Ru, Os)
- Long-range magnetic order in CeRu2Al10 evidenced by muSR and neutron diffraction
- Possible Long-Range Order with Singlet Ground State in CeRu2Al10
- Long-range order and low-energy magnetic excitations in CeRu2Al10
- Optical study of charge instability in CeRu2Al10 in comparison with CeOs2Al10 and CeFe2Al10
- The Kondo Lattice Model in Infinite Dimensions II. Static Susceptibilities and Phase Diagram
- Anisotropic spin-dynamics in the Kondo semiconductor CeRu2Al10
- High-field magnetization and magnetic phase transition in CeOs2Al10
- A theory of the electric quadrupole contribution to resonant x-ray scattering: Application to multipole ordering phases in Ce_{1-x}La_{x}B_{6}
- Change of magnetic ground state by light electron-doping in CeOs2Al10
- Resonant x-ray scattering spectra from multipole orderings: Np M_{4,5} edges in NpO2
- Resonant Magnetic X-ray Diffraction Study on the Triangular Lattice Antiferromagnet GdPd2Al3
- Detailed neutron diffraction study of magnetic order in NdFeAl
- Incommensurate-Commensurate Magnetic Phase Transition in SmRuAl
Cited by in corpus (4)
- Helical Ordering of Spin Trimers in a Distorted Kagome Lattice of GdRuAl Studied by Resonant X-ray Diffraction
- Distorted triangular skyrmion lattice in a noncentrosymmetric tetragonal magnet
- Competition between helimagnetic and ferroquadrupolar orderings in a monoaxial chiral magnet DyNiGa studied by resonant x-ray diffraction
- A crossover from Kondo semiconductor to metallic antiferromagnet with -electron doping in CeFeAl