Microscopic origin of the magnetoelectronic phase separation in Sr-doped LaCoO3

Z. Németh, András Szabó, Karel Knížek, Marcin Sikora, Roman Chernikov, Norbert Sas, Csilla Bogdán, Dénes Lajos Nagy, G. Vankó

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The nanoscopic magnetoelectronic phase separation in doped La 1-xSrxCoO3 perovskites was studied with local probes. The phase separation is directly observed by Mössbauer spectroscopy in the studied doping range of 0.05 ≤ x ≤ 0.25 both at room temperature and in the low-temperature magnetic phase. Extended with current synchrotron-based x-ray spectroscopies, these data help to characterize the volume as well as the local electric and magnetic properties of the distinct phases. A simple model based on a random distribution of the doping Sr ions describes well both the evolution of the separated phases and the variation of the Co spin state. The experiments suggest that Sr doping initiates small droplets and a high degree of doping-driven cobalt spin-state transition, while the Sr-free second phase vanishes rapidly with increasing Sr content.

Original languageEnglish
Article number035125
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume88
Issue number3
DOIs
Publication statusPublished - Jul 19 2013

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Magnetoelectronics
Phase separation
Doping (additives)
Spectroscopy
perovskites
Cobalt
statistical distributions
Synchrotrons
x ray spectroscopy
Magnetic properties
synchrotrons
Electric properties
cobalt
Ions
magnetic properties
X rays
Temperature
probes
room temperature
spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Microscopic origin of the magnetoelectronic phase separation in Sr-doped LaCoO3. / Németh, Z.; Szabó, András; Knížek, Karel; Sikora, Marcin; Chernikov, Roman; Sas, Norbert; Bogdán, Csilla; Nagy, Dénes Lajos; Vankó, G.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 88, No. 3, 035125, 19.07.2013.

Research output: Contribution to journalArticle

Németh, Z. ; Szabó, András ; Knížek, Karel ; Sikora, Marcin ; Chernikov, Roman ; Sas, Norbert ; Bogdán, Csilla ; Nagy, Dénes Lajos ; Vankó, G. / Microscopic origin of the magnetoelectronic phase separation in Sr-doped LaCoO3. In: Physical Review B - Condensed Matter and Materials Physics. 2013 ; Vol. 88, No. 3.
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AU - Sas, Norbert

AU - Bogdán, Csilla

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