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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

Magnetic investigation of Mn ions in La,Mn:SrTiO3

AZZONI, CARLO;MOZZATI, MARIA CRISTINA;GALINETTO, PIETRO;MASSAROTTI, VINCENZO;BINI, MARCELLA;CAPSONI, DORETTA
2000-01-01

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
2000
Applied Physics/Condensed Matter/Materials Science encompasses the resources of three related disciplines: Applied Physics, Condensed Matter Physics, and Materials Science. The applied physics resources are concerned with the applications of topics in condensed matter as well as optics, vacuum science, lasers, electronics, cryogenics, magnets and magnetism, acoustical physics and mechanics. The condensed matter physics resources are concerned with the study of the structure and the thermal, mechanical, electrical, magnetic and optical properties of condensed matter. They include superconductivity, surfaces, interfaces, thin films, dielectrics, ferroelectrics and semiconductors. The materials science resources are concerned with the physics and chemistry of materials and include ceramics, composites, alloys, metals and metallurgy, nanotechnology, nuclear materials, adhesion and adhesives. Resources dealing with polymeric materials are listed in the Organic Chemistry/Polymer Science category.
SOLID STATE COMMUNICATIONS
sì
WOS:000089704300002
2-s2.0-0034300854
Esperti anonimi
Inglese
Internazionale
STAMPA
116
303
308
6
Tematica Ex SIR: Ossidi ternari (Classif. Ex SIR:Articoli su riviste ISI )
disordered systems, grain boundaries, x-ray scattering, electron paramagnetic resonance, static magnetic susceptibility
7
info:eu-repo/semantics/article
262
Azzoni, Carlo; Mozzati, MARIA CRISTINA; Galinetto, Pietro; Paleari, A.; Massarotti, Vincenzo; Bini, Marcella; Capsoni, Doretta
1 Contributo su Rivista::1.1 Articolo in rivista
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1.1 Articolo in rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/133155
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