X-ray absorption and x-ray magnetic dichroism study onCa3CoRhO6andCa3FeRhO6

2008/03/03 by T. Burnus, Zhiwei Hu, Z. Hu +16
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Magnetism in coordination complexes #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.77.205111

published as Phys. Rev. B 77, 205111 (2008) · 7 pages, 6 figures

arxiv created 2008/03/03 · openalex publication_date 2008/05/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

By using x-ray absorption spectroscopy at the Rh L_2,3, Co L_2,3, and Fe L_2,3 edges, we find a valence state of Co²⁺/Rh⁴⁺ in Ca₃CoRhO₆ and of Fe³⁺/Rh³⁺ in Ca₃FeRhO₆. X-ray magnetic circular dichroism spectroscopy at the Co L_2,3 edge of Ca₃CoRhO₆ reveals a giant orbital moment of about 1.7\ensuremathμ_B, which can be attributed to the occupation of the minority-spin d₀d₂ orbital state of the high-spin Co²⁺ (3d⁷) ions in trigonal prismatic coordination. This active role of the spin-orbit coupling explains the strong magnetocrystalline anisotropy and Ising-type magnetism of Ca₃CoRhO₆.

Citations

• The distribution of the doped holes in La2-xSrxCu1-yRuyO4-(delta)
• Local electronic structure and magnetic properties ofLaMn0.5Co0.5O3studied by x-ray absorption and magnetic circular dichroism spectroscopy
• Superparamagnetic-like ac susceptibility behavior in the partially disordered antiferromagnetic compoundCa3CoRhO6