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  • 1
    Digitale Medien
    Digitale Medien
    Magnetic properties of chromium doped rare earth manganites Ln0.5Ca0.5Mn1−xCrxO3 (Ln=Pr, Nd, Sm and 0.05≤x≤0.10) by soft x-ray magnetic circular dichroism (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 86 (1999), S. 2616-2621 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Soft-x-ray magnetic circular dichroism (SXMCD) at Mn, Cr L2,3 and Ln M4,5 edges of Ln0.5Ca0.5Mn1−xCrxO3 (Ln=Pr, Nd, Sm and 0.05≤x≤0.10) bulk polycrystalline samples have been performed at T=20 K below the ferromagnetic Curie temperature. We show the existence of magnetic sublattice on each of the probed cations. Chromium cations order at low temperature antiparallel to the manganese subnetwork and rare earth cations likely exhibit a sperimagnetic ordering. These results are compared with magnetization measurements and a tentative correlation with magnetoresistance properties is discussed. This work also demonstrates that SXMCD can probe element and site specific magnetic properties of multicomponent systems. © 1999 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.371100
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  • 2
    Digitale Medien
    Digitale Medien
    Chromium doped manganites: evidence for electronically phase-separated systems (2000)
    Springer
    The European physical journal 18 (2000), S. 233-240 
    Details
    ISSN: 1434-6036
    Schlagwort(e): PACS. 75.30.Vn Colossal magnetoresistance - 78.70.Dm X-ray absorption spectra - 75.25.+z Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract: X-ray absorption spectroscopy (XAS) and soft-X-ray magnetic circular dichroism (SXMCD) at the Mn L2,3-, Cr L2,3- and O-K edges of Sm0.5Ca0.5Mn1-xCrxO3 ( ) bulk polycrystalline samples have been performed at T=20 K below the ferromagnetic Curie temperature. We show the existence of a magnetic sublattice on each of the probed cations. Considering an electronically phase-separated system, results are compared with magnetization and resistivity measurements and a tentative correlation with magnetoresistance properties on such doped compounds is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s100510070053
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  • 3
    Digitale Medien
    Digitale Medien
    Charge states of transition metal in “Cr, Co and Ni” doped Ln Ca MnO CMR manganites (1998)
    Springer
    The European physical journal 4 (1998), S. 159-167 
    Details
    ISSN: 1434-6036
    Schlagwort(e): PACS. 78.70.Dm X-ray absorption spectra - 75.70.Pa Giant magnetoresistances - 71.30.+h Metal-insulator transitions and other electronic transitions
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract: The XAS study at Cr, Co, Ni and Mn K-edges was performed for the doped CMR manganites Ln0.5Ca0.5Mn1-xBxO3 with Ln=La, Nd, Sm and B= Cr, Co, Ni ( ), on the samples that were studied previously for their ferromagnetic-metallic to antiferromagnetic-insulator transition. We observed that the formal charges of the doping elements are Ni2+, Co2+ and Cr3+. It is also evidenced that the average formal charge of the manganese is increased after doping, in agreement with the charge compensation keeping “O3” stoichiometry. These results suggest that the doping elements participate directly to the band structure.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s100510050364
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