Publications (5)
Imitation of spin density wave order in CuNbO
N. Giles-Donovan, N. Qureshi, R. D. Johnson +4
Spin density waves, based on modulated local moments, are usually associated with metallic materials, but have recently been reported in insulators which display coupled magnetic a…
Spin-wave directional anisotropies in antiferromagnetic BaNbFeSiO
C. Stock, R. D. Johnson, N. Giles-Donovan +14
BaNbFeSiO (langasite) is structurally and magnetically single domain chiral with the magnetic helicity induced through competing symmetric exchange interac…
Magnetic skin effect in Pb(FeNb)O
N. Giles-Donovan, A. D. Hillier, K. Ishida +9
Relaxor-ferroelectrics display exceptional dielectric properties resulting from the underlying random dipolar fields induced by strong chemical inhomogeneity. An unusual structural…
Fast broadband cluster spin-glass dynamics in PbFeNbO
C. Stock, B. Roessli, P. M. Gehring +11
PbFeNbO (PFN) is a relaxor ferroelectric (T 400 K) consisting of disordered magnetic Fe (S=, L0) ions resulting in a l…
Common acoustic phonon lifetimes in inorganic and hybrid lead halide perovskites
M. Songvilay, N. Giles-Donovan, M. Bari +12
The acoustic phonons in the organic-inorganic lead halide perovskites have been reported to have anomalously short lifetimes over a large part of the Brillouin zone. The resulting…