2002/06/10 by A. Gukasov, M. Braden, R. Papoular +4 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.89.087202
4 pages 3 figures
arxiv created 2002/06/10 · openalex publication_date 2002/08/02 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
By means of polarized neutron diffraction in a magnetic field of 7.0 T at 1.6 K an anomalously large magnetization density is observed on the in-plane oxygen in Ca1.5Sr0.5RuO4. Field-induced moments of different ions are determined by refinement on the flipping ratios, yielding \ensuremathμRu=0.346(11)\ensuremathμB, \ensuremathμO1=0.076(6)\ensuremathμB, and \ensuremathμO2=0.009(6)\ensuremathμB. The moment on the oxygen arises from the strong hybridization between the Ru\ensuremath-4d and O\ensuremath-2p orbitals. The maximum entropy magnetization density reconstruction reveals a strongly anisotropic density at the Ru site, consistent with the distribution of the xy (t2g band) d orbitals.