Structural, Mössbauer and magnetic studies of Nd0.1Sr0.9FeO3-δ mechanosynthesized nanoparticles

Hisham M. Widatallah; Marwa S. Al-Shanfari; Khadija S. Al-Rashdi; Ahmed D. Al-Rawas; Abbasher M. Gismelseed; Mohamed E. Elzain; Fadhila N. Al-Mabsali

doi:10.1016/j.jssc.2022.123645

Structural, Mössbauer and magnetic studies of Nd_0.1Sr_0.9FeO_3-δ mechanosynthesized nanoparticles

Hisham M. Widatallah^*, Marwa S. Al-Shanfari, Khadija S. Al-Rashdi, Ahmed D. Al-Rawas, Abbasher M. Gismelseed, Mohamed E. Elzain, Fadhila N. Al-Mabsali

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The structural and magnetic properties of Nd_0.1Sr_0.9FeO_3-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 SrFeO_3-δ phases, are reported. Both XRD and ⁵⁷Fe Mӧssbauer spectroscopy show the nanoparticles to be a mixture of the cubic Nd_0.1Sr_0.9FeO₃ and the Fe⁴⁺/Fe³⁺ mixed-valence tetragonal Nd_0.1Sr_0.9FeO_2.875 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 SrFeO_3-δ phases are detected. The Nd_0.1Sr_0.9FeO_3-δ nanoparticles are found to display superparamagnetism with blocking temperatures of ≥78 K for the Nd_0.1Sr_0.9FeO₃ phase and ∼ 61 K for the Nd_0.1Sr_0.9FeO_2.875 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 Nd_0.1Sr_0.9FeO₃, spin canting in Nd_0.1Sr_0.9FeO_2.875 and doping with the Nd³⁺cation.

Original language	English
Article number	123645
Journal	Journal of Solid State Chemistry
Volume	316
DOIs	https://doi.org/10.1016/j.jssc.2022.123645
Publication status	Published - Dec 2022
Externally published	Yes

Keywords

Mechanosynthesis
Mössbauer spectroscopy
Perovskite
VSM
XPS
XRD

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/j.jssc.2022.123645

Cite this

@article{9e5dcedc2a3e4c37a95bdfbb84962224,

title = "Structural, M{\"o}ssbauer and magnetic studies of Nd0.1Sr0.9FeO3-δ mechanosynthesized nanoparticles",

abstract = "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.",

keywords = "Mechanosynthesis, M{\"o}ssbauer spectroscopy, Perovskite, VSM, XPS, XRD",

author = "Widatallah, {Hisham M.} and Al-Shanfari, {Marwa S.} and Al-Rashdi, {Khadija S.} and Al-Rawas, {Ahmed D.} and Gismelseed, {Abbasher M.} and Elzain, {Mohamed E.} and Al-Mabsali, {Fadhila N.}",

note = "Funding Information: HMW acknowledges the support of Sultan Qaboos University (SQU) through the research grant ( SQU/Sci/Phys/04/16 ). Publisher Copyright: {\textcopyright} 2022 Elsevier Inc.",

year = "2022",

month = dec,

doi = "10.1016/j.jssc.2022.123645",

language = "English",

volume = "316",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

}

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.

PY - 2022/12

Y1 - 2022/12

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

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U2 - 10.1016/j.jssc.2022.123645

DO - 10.1016/j.jssc.2022.123645

M3 - Article

AN - SCOPUS:85139593032

SN - 0022-4596

VL - 316

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

M1 - 123645

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