Local electronic structure and magnetic properties ofLaMn0.5Co0.5O3studied by x-ray absorption and magnetic circular dichroism spectroscopy

2007/09/30 by T. Burnus, Zhiwei Hu, Z. Hu +12 · 4 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Multiferroics and related materials #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.77.125124

published as Phys. Rev. B 77, 125124 (2008) · 8 pages, 7 figures

arxiv created 2008/03/17 · openalex publication_date 2008/03/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We have studied the local electronic structure of LaMn_0.5Co_0.5O₃ using soft-x-ray absorption spectroscopy at the Co\text\ensuremath-L_3,2 and Mn\text\ensuremath-L_3,2 edges. We found a high-spin Co²⁺\text\ensuremath-Mn⁴⁺ valence state for samples with the optimal Curie temperature. We discovered that samples with lower Curie temperatures contain low-spin nonmagnetic Co³⁺ ions. Using soft-x-ray magnetic circular dichroism, we established that the Co²⁺ and Mn⁴⁺ ions are ferromagnetically aligned. We also revealed that the Co²⁺ ions have a large orbital moment: m_orb∕m_spin\ensuremath≈0.47. Together with model calculations, this suggests the presence of a large magnetocrystalline anisotropy in the material and predicts a nontrivial temperature dependence for the magnetic susceptibility.

Citations

• Colossal magnetoresistance

Cited by

• Ising Magnetism and Ferroelectricity inCa3CoMnO6
• X-ray absorption and x-ray magnetic dichroism study onCa3CoRhO6andCa3FeRhO6
• Spectroscopic studies on the electronic and magnetic states of Co-doped perovskite manganite Pr0.8Ca0.2Mn1−yCoyO3thin films
• Absence of superconductivity in the hole-doped Fe pnictide Ba(Fe1−xMnx)2As2: Photoemission and x-ray absorption spectroscopy studies