Title of article :
Magnetic investigation of Mn ions in La,Mn:SrTiO3
Author/Authors :
Azzoni، نويسنده , , C.B. and Mozzati، نويسنده , , M.C. and Galinetto، نويسنده , , P. and Paleari، نويسنده , , A. and Massarotti، نويسنده , , V. and Bini، نويسنده , , M. and Capsoni، نويسنده , , D.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2000
Abstract :
Electron paramagnetic resonance (EPR) and static magnetic susceptibility measurements were carried out on lanthanum–manganese substituted (up to 10 mol%) strontium titanate polycrystalline samples. X-ray diffraction (XRD) analysis revealed in each sample a single cubic perovskite phase with a different lattice parameter. Only weak and narrow EPR signals from a small fraction of Mn2+ and Mn4+ ions were observed when the La and Mn content did not exceed 5 mol%, indicating the nearly complete stabilisation of the Mn3+ oxidation state. Heavily substituted samples showed another EPR signal, very broad and with intensity and resonance field strongly temperature dependent. For these samples, a complex dynamics of Mn3+ stabilisation is suggested, supported by micro-Raman data.
Keywords :
E. Electron paramagnetic resonance , E. Static magnetic susceptibility , A. Disordered systems , C. Grain boundaries , C. X-ray scattering
Journal title :
Solid State Communications
Journal title :
Solid State Communications
