In-plane anisotropy of the single- and multiple- ordered phases in the antiferromagnetic metal CeRhSi unveiled by the bulk measurements under uniaxial stress and neutron scattering
arXiv:2306.11284 · doi:10.1103/PhysRevB.108.094440
Abstract
We performed magnetization, resistivity, and neutron diffraction measurements under uniaxial stress applied along [1-10] direction on the tetragonal magnet CeRhSi with commensurate magnetic orders. CeRhSi has two successive antiferromagnetic (AF) orders in zero magnetic field. The high temperature phase (AF1 phase) has the magnetic modulation wave vector of , and the low temperature phase (AF2 phase) is characterized by the four -vectors of , and . By measuring the uniaxial stress dependence of the magnetization, resistivity and the intensities of magnetic Bragg reflections, we confirmed that the AF1 phase has the single- magnetic order with two-fold rotational symmetry and the AF2 phase has the multi- magnetic order with four-fold rotational symmetry. In order to understand the origin of multi- order of CeRhSi, we also performed inelastic neutron scattering measurement on the single crystal samples. We found a magnetic excitation at the transfer energy 8 meV. By applying the linear spin-wave theory, we found that the nearest and the next-nearest neighbor exchange interactions on the -plane, and , are dominant in the AF2 phase. However, the - model cannot lift the degeneracy between the single- (AF1) and multi- (AF2) phases. We suggest that it can be lifted by taking into account the biquadratic interaction derived from the perturbative expansion for the Kondo lattice Hamiltonian. [S. Hayami et al., Phys. Rev. B 95, 224424 (2017).
arXiv comment7 pages, 7 figures
References in corpus (15)
- Skyrmion Lattice in a Chiral Magnet
- Topological Hall effect in the A-phase of MnSi
- Skyrmion lattice with a giant topological Hall effect in a frustrated triangular-lattice magnet
- A new class of chiral materials hosting magnetic skyrmions beyond room temperature
- Electric field driven switching of individual magnetic skyrmions
- Nanometric square skyrmion lattice in a centrosymmetric tetragonal magnet
- Effective bilinear-biquadratic model for noncoplanar ordering in itinerant magnets
- Néel-type skyrmion lattice in tetragonal polar magnet VOSeO
- Long-range crystalline nature of the skyrmion lattice in MnSi
- Topological Nernst effect of the two-dimensional skyrmion lattice
- Unique Helical Magnetic Order and Field-Induced Phase in Trillium Lattice Antiferromagnet EuPtSi
- Zoology of multiple-Q spin textures in a centrosymmetric tetragonal magnet with itinerant electrons
- Efficient Langevin Simulation of Coupled Classical Fields and Fermions
- Topological Thermal Hall Effect of Magnons in Magnetic Skyrmion Lattice
- High-resolution resonant inelastic soft X-ray scattering as a probe of the crystal electrical field in lanthanides demonstrated for the case of CeRh2Si2