TY - JOUR
T1 - Structural, Mössbauer and magnetic studies of Nd0.1Sr0.9FeO3-δ mechanosynthesized nanoparticles
AU - Widatallah, Hisham M.
AU - Al-Shanfari, Marwa S.
AU - Al-Rashdi, Khadija S.
AU - Al-Rawas, Ahmed D.
AU - Gismelseed, Abbasher M.
AU - Elzain, Mohamed E.
AU - Al-Mabsali, Fadhila N.
N1 - Funding Information:
HMW acknowledges the support of Sultan Qaboos University (SQU) through the research grant ( SQU/Sci/Phys/04/16 ).
Publisher Copyright:
© 2022 Elsevier Inc.
PY - 2022/12/1
Y1 - 2022/12/1
N2 - The structural and magnetic properties of Nd0.1Sr0.9FeO3-δ nanoparticles (∼60–70 nm) formed by mechanosynthesis at 800 °C (12 h), which is ∼ 200–600 °C lower than the reported formation temperatures of rare earth cation-doped SrFeO3-δ phases, are reported. Both XRD and 57Fe Mӧssbauer spectroscopy show the nanoparticles to be a mixture of the cubic Nd0.1Sr0.9FeO3 and the Fe4+/Fe3+ mixed-valence tetragonal Nd0.1Sr0.9FeO2.875 phases in the ratio of ∼ 45: 55. XPS data reveal a complex surface composition for the nanoparticles where traces of the initial reactants as well as other SrFeO3-δ phases are detected. The Nd0.1Sr0.9FeO3-δ nanoparticles are found to display superparamagnetism with blocking temperatures of ≥78 K for the Nd0.1Sr0.9FeO3 phase and ∼ 61 K for the Nd0.1Sr0.9FeO2.875 one. The nanoparticles exhibit an antiferromagnetic-to-weak ferromagnetic transition at ∼23 K which is attributed to the combined effects of the helical magnetic structure of Nd0.1Sr0.9FeO3, spin canting in Nd0.1Sr0.9FeO2.875 and doping with the Nd3+cation.
AB - The structural and magnetic properties of Nd0.1Sr0.9FeO3-δ nanoparticles (∼60–70 nm) formed by mechanosynthesis at 800 °C (12 h), which is ∼ 200–600 °C lower than the reported formation temperatures of rare earth cation-doped SrFeO3-δ phases, are reported. Both XRD and 57Fe Mӧssbauer spectroscopy show the nanoparticles to be a mixture of the cubic Nd0.1Sr0.9FeO3 and the Fe4+/Fe3+ mixed-valence tetragonal Nd0.1Sr0.9FeO2.875 phases in the ratio of ∼ 45: 55. XPS data reveal a complex surface composition for the nanoparticles where traces of the initial reactants as well as other SrFeO3-δ phases are detected. The Nd0.1Sr0.9FeO3-δ nanoparticles are found to display superparamagnetism with blocking temperatures of ≥78 K for the Nd0.1Sr0.9FeO3 phase and ∼ 61 K for the Nd0.1Sr0.9FeO2.875 one. The nanoparticles exhibit an antiferromagnetic-to-weak ferromagnetic transition at ∼23 K which is attributed to the combined effects of the helical magnetic structure of Nd0.1Sr0.9FeO3, spin canting in Nd0.1Sr0.9FeO2.875 and doping with the Nd3+cation.
KW - Mechanosynthesis
KW - Mössbauer spectroscopy
KW - Perovskite
KW - VSM
KW - XPS
KW - XRD
UR - http://www.scopus.com/inward/record.url?scp=85139593032&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85139593032&partnerID=8YFLogxK
U2 - 10.1016/j.jssc.2022.123645
DO - 10.1016/j.jssc.2022.123645
M3 - Article
AN - SCOPUS:85139593032
SN - 0022-4596
VL - 316
SP - 1
EP - 9
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
M1 - 123645
ER -