2008/04/28 by M. B. Stone, M. D. Lumsden, Sung‐A Chang +5 · 47 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Atomic physics #Computer science #Condensed matter physics #Dimer #Excited state #Ferromagnetism #Frustration #Inelastic neutron scattering #Lattice (music) #Machine learning #Magnetic and transport properties of perovskites and related materials #Neutron scattering #Nuclear magnetic resonance #Phase (matter) #Phase diagram #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Scattering #Singlet state #cond-mat.str-el #k-nearest neighbors algorithm
paper · pdf · doi:10.1103/physrevlett.100.237201
published in Physical Review Letters 100(23), 237201 (American Physical Society) · 4 pages, 3 color figures, submitted to an APS physical review journal
arxiv created 2008/04/28 · openalex publication_date 2008/06/09 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present single crystal inelastic neutron scattering measurements of the S=1 dimerized quasi-two-dimensional antiferromagnet Ba(3)Mn(2)O(8). The singlet-triplet dispersion reveals nearest-neighbor and next-nearest-neighbor ferromagnetic interactions between adjacent bilayers that compete against each other. Although the interbilayer exchange is comparable to the intrabilayer exchange, this additional frustration reduces the effective coupling along the c axis and leads to a quasi-two-dimensional behavior. In addition, the obtained exchange values are able to reproduce the four critical fields in the phase diagram.