5 papers
Dispersive-phonon-driven room-temperature Ni1+-Ni2+ polaron hopping in spin-charge coupled rutile niobate
Gourab Roy, Mohit Kumar, Sayan Ghosh +4
Understanding how lattice dynamics mediate polaron hopping is essential for designing multifunctional correlated oxides. Here, we demonstrate room-temperature dispersive phonon exc…
Interplay of Spin Waves, Crystal-Field Excitations, and Phonons in Multiferroic Ba3HoRu2O9 revealed by Inelastic Neutron Scattering, Crystal-Field Analysis, and Machine-Learned Phonon Calculations
Ekta Kushwaha, Sayan Ghosh, Gourab Roy +6
Understanding the microscopic origin of spin-dipole coupling and high-energy excitations in correlated 4d-4f multiferroic oxides is challenging because magnetic, crystal-field, and…
Atypical Ferrimagnetism in NiNbO
Jhuma Sannigrahi, Roumita Roy, Richard Waite +6
Ferrimagnetism typically emerges from chemically distinct magnetic ions or the same element at two inequivalent crystallographic sites, rendering unequal moments. In contrast, Ni4N…
Magnetic excitations and exchange parameters of a nickel chain compound PbMnNiTeO: Neutron scattering and density functional theory studies
S. Uthayakumar, D. T. Adroja, Amit Pokhriyal +10
We have investigated the quasi-one dimensional Ni-chain compound PbMnNiTeO using theoretical DFT calculations, inelastic neutron scattering and optical spectrosc…
Low-temperature magnetic behaviour on the triangular lattice in hexagonal BaTb(BO)
Nicola Kelly, Manh Duc Le, Denis Sheptyakov +5
The hexagonal polymorph of BaTb(BO) contains Tb ions on a quasi-2D triangular lattice, resulting in geometric magnetic frustration. Powder samples of BaTb(BO…