2007/11/05 by Natalia B. Perkins, N. B. Perkins, Olga Sikora +1
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Anisotropy #Antiferromagnetism #Chemistry #Condensed matter physics #Coupling (piping) #Crystal (programming language) #Inorganic chemistry #Magnetic and transport properties of perovskites and related materials #Materials science #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin (aerodynamics) #Spinel #Spins #Superexchange #Vanadium #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.76.214434
published as Phys. Rev. B 76, 214434 (2007) · accepted in Phys. Rev. B
arxiv created 2007/11/05 · openalex publication_date 2007/12/28 · arxiv updated 2014/09/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study magnetic excitations in vanadium spinel oxides AV2O4 (A=Zn,Mg,Cd) using two models: the first one is a superexchange model for vanadium S=1 spins and the second one includes, in addition, spin-orbit coupling and crystal anisotropy. We show that the experimentally observed magnetic ordering can be obtained in both models; however, the orbital ordering is different with and without spin-orbit coupling and crystal anisotropy. We demonstrate that this difference strongly affects the spin-wave excitation spectrum above the magnetically ordered state, and argue that the neutron measurement of such dispersion is a way to distinguish between the two possible orbital orderings in AV2O4.