Electron paramagnetic resonance (EPR) of antiferromagnetic nanoparticles of La1−xSrxCrO3 (0.000 ≤ x ≤ 0.020) synthesized by combustion reaction

Página do item simplificado
dc.creatorFranco Junior, Adolfo
dc.creatorSantana, Ricardo Costa de
dc.date.accessioned2024-07-11T15:03:05Z
dc.date.available2024-07-11T15:03:05Z
dc.date.issued2010
dc.description.abstractNanocrystalline particles of La1−xSrxCrO3 (0.000 ≤ x ≤ 0.020) compounds were synthesized in order to investigate the antiferromagnetic (AFM) to paramagnetic (PM) phase transition temperature, g-factor, line width and intensity by electron paramagnetic resonance (EPR). All samples were synthesized by combustion reaction method using strontium nitrate, lanthanum nitrate, chromium nitrate and urea as fuel without subsequent heat treatment. X-ray diffraction patterns of all systems showed broad peaks consistent with orthorhombic structure of LaCrO3. The absence of extra reflections in the diffraction patterns of as-prepared materials ensures the phase purity. The average crystallite sizes determined from the prominent (1 1 2) peak of the diffraction using Scherrer's equation was independent of the addition of Sr2+ ions; being ca. 31–29 nm for x = 0.000 and 0.020, respectively. The EPR line width and intensity were found to be dependent on Sr2+ addition and temperature. However, the AFM–PM transition temperature was found to be independent of strontium concentration, being ca. 296 K. In the PM phase, g-factor was nearly temperature independent with increasing of x. The EPR results indicated that the addition of Sr2+ ions may induce creation of Cr3+–Cr4+ clusters.
dc.identifier.citationFRANCO JUNIOR, Adolfo; SANTANA, Ricardo C. Electron paramagnetic resonance (EPR) of antiferromagnetic nanoparticles of La1?xSrxCrO3 (0.000?x?0.020) synthesized by combustion reaction. Materials Chemistry and Physics, Amsterdam, v. 120, n. 1, p. 225-228, 2010. DOI: 10.1016/j.matchemphys.2009.10.052. Disponível em: https://www.sciencedirect.com/science/article/pii/S0254058409006774. Acesso em: 25 maio 2023.
dc.identifier.doi10.1016/j.matchemphys.2009.10.052
dc.identifier.issn0254-0584
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0254058409006774
dc.language.isoeng
dc.publisher.countryHolanda
dc.publisher.departmentInstituto de Física - IF (RMG)
dc.rightsAcesso Restrito
dc.subjectPerovskite La1−xSrxCrO3
dc.subjectMagnetic phase transition
dc.subjectElectron paramagnetic resonance (EPR)
dc.titleElectron paramagnetic resonance (EPR) of antiferromagnetic nanoparticles of La1−xSrxCrO3 (0.000 ≤ x ≤ 0.020) synthesized by combustion reaction
dc.typeArtigo

Arquivos

Licença do Pacote
Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:
Baixar

Coleções

IF - Artigos publicados em periódicos