D. D. Khalyavin

Mar 14, 2024 | link.aps.org | M. F. Islam |D. D. Khalyavin |ISIS Facility |P. Manuel

We investigate the magnetic properties of the monoclinic D-type Er2Si2O7 with a distorted honeycomb lattice using powder and single-crystal neutron scattering techniques, as well as single-crystal magnetization measurements. The powder neutron diffraction shows that below the ordering temperature, TN=1.85K, the compound forms a q=0 antiferromagnetic structure with four sublattices.

Sep 5, 2023 | link.aps.org | S. W. Lovesey |ISIS Facility |Harwell Science |D. D. Khalyavin

The magnetic structure of RuO2 and the Ru atomic configuration are unknown. A magnetic structure is inferred by confronting measured and calculated Bragg diffraction patterns and adjusting the latter to achieve satisfactory agreement. An accepted pattern, a magnetic symmetry, includes symmetry of sites occupied by the magnetic ions.

Aug 3, 2023 | link.aps.org | A. M. Vibhakar |Harwell Science |D. D. Khalyavin |ISIS Facility

Abstract A combination of competing exchange interactions and substitutional disorder gives rise to magnetic inhomogeneities in the [Y2−xMnx]Mn6O12x=0.23 and 0.16 quadruple perovskite manganites.

May 11, 2023 | link.aps.org | D. D. Khalyavin |ISIS Facility |Harwell Science |D. A. Mayoh

Abstract GdRu2Si2 is a centrosymmetric magnet in which a skyrmion lattice has recently been discovered. Here, we investigate the magnetic structure of the zero-field ground state using neutron diffraction on single crystal and polycrystalline GdRu1602Si2. In addition to observing the principal propagation vectors q1 and q2, we discover higher-order magnetic satellites, notably q1+2q2. The appearance of these satellites is explained within the framework of a double-Q constant-moment solution.