On magnetic ordering in heavily sodium substituted hole doped lanthanum manganites

N. Sethulakshmi, A. N. Unnimaya, I. A. Al-Omari, Salim Al-Harthi, S. Sagar, Senoy Thomas, G. Srinivasan, M. R. Anantharaman

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Mixed valence manganite system with monovalent sodium substituted lanthanum manganites form the basis of the present work. Lanthanum manganites belonging to the series La1-xNaxMnO3 with x=0.5-0.9 were synthesized using modified citrate gel method. Variation of lattice parameters and unit cell volume with Na concentration were analyzed and the magnetization measurements indicated ferromagnetic ordering in all samples at room temperature. Low temperature magnetization behavior indicated that all samples exhibit antiferromagnetism along with ferromagnetism and it has also been observed that antiferromagnetic ordering dominates ferromagnetic ordering as concentration is increased. Evidence for such a magnetic inhomogeneity in these samples has been confirmed from the variation in Mn3+/Mn4+ ion ratio from X-ray Photoelectron Spectroscopy and from the absorption peak studies using Ferromagnetic Resonance Spectroscopy.

Original languageEnglish
Pages (from-to)75-82
Number of pages8
JournalJournal of Magnetism and Magnetic Materials
Volume391
DOIs
Publication statusPublished - Apr 23 2015

Fingerprint

Manganites
Lanthanum
lanthanum
Magnetization
Sodium
sodium
Antiferromagnetism
Ferromagnetic resonance
Ferromagnetism
Citric Acid
Lattice constants
magnetization
Gels
X ray photoelectron spectroscopy
antiferromagnetism
Spectroscopy
citrates
ferromagnetic resonance
Ions
Temperature

Keywords

  • Lanthanum manganites
  • Magnetic inhomogeneity
  • Mixed valency
  • Monovalent substitution
  • Na concentration
  • Oxygen vacancy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

On magnetic ordering in heavily sodium substituted hole doped lanthanum manganites. / Sethulakshmi, N.; Unnimaya, A. N.; Al-Omari, I. A.; Al-Harthi, Salim; Sagar, S.; Thomas, Senoy; Srinivasan, G.; Anantharaman, M. R.

In: Journal of Magnetism and Magnetic Materials, Vol. 391, 23.04.2015, p. 75-82.

Research output: Contribution to journalArticle

Sethulakshmi, N. ; Unnimaya, A. N. ; Al-Omari, I. A. ; Al-Harthi, Salim ; Sagar, S. ; Thomas, Senoy ; Srinivasan, G. ; Anantharaman, M. R. / On magnetic ordering in heavily sodium substituted hole doped lanthanum manganites. In: Journal of Magnetism and Magnetic Materials. 2015 ; Vol. 391. pp. 75-82.
@article{44565d1465624fc59a0887692d1e9696,
title = "On magnetic ordering in heavily sodium substituted hole doped lanthanum manganites",
abstract = "Mixed valence manganite system with monovalent sodium substituted lanthanum manganites form the basis of the present work. Lanthanum manganites belonging to the series La1-xNaxMnO3 with x=0.5-0.9 were synthesized using modified citrate gel method. Variation of lattice parameters and unit cell volume with Na concentration were analyzed and the magnetization measurements indicated ferromagnetic ordering in all samples at room temperature. Low temperature magnetization behavior indicated that all samples exhibit antiferromagnetism along with ferromagnetism and it has also been observed that antiferromagnetic ordering dominates ferromagnetic ordering as concentration is increased. Evidence for such a magnetic inhomogeneity in these samples has been confirmed from the variation in Mn3+/Mn4+ ion ratio from X-ray Photoelectron Spectroscopy and from the absorption peak studies using Ferromagnetic Resonance Spectroscopy.",
keywords = "Lanthanum manganites, Magnetic inhomogeneity, Mixed valency, Monovalent substitution, Na concentration, Oxygen vacancy",
author = "N. Sethulakshmi and Unnimaya, {A. N.} and Al-Omari, {I. A.} and Salim Al-Harthi and S. Sagar and Senoy Thomas and G. Srinivasan and Anantharaman, {M. R.}",
year = "2015",
month = "4",
day = "23",
doi = "10.1016/j.jmmm.2015.04.092",
language = "English",
volume = "391",
pages = "75--82",
journal = "Journal of Magnetism and Magnetic Materials",
issn = "0304-8853",
publisher = "Elsevier",

}

TY - JOUR

T1 - On magnetic ordering in heavily sodium substituted hole doped lanthanum manganites

AU - Sethulakshmi, N.

AU - Unnimaya, A. N.

AU - Al-Omari, I. A.

AU - Al-Harthi, Salim

AU - Sagar, S.

AU - Thomas, Senoy

AU - Srinivasan, G.

AU - Anantharaman, M. R.

PY - 2015/4/23

Y1 - 2015/4/23

N2 - Mixed valence manganite system with monovalent sodium substituted lanthanum manganites form the basis of the present work. Lanthanum manganites belonging to the series La1-xNaxMnO3 with x=0.5-0.9 were synthesized using modified citrate gel method. Variation of lattice parameters and unit cell volume with Na concentration were analyzed and the magnetization measurements indicated ferromagnetic ordering in all samples at room temperature. Low temperature magnetization behavior indicated that all samples exhibit antiferromagnetism along with ferromagnetism and it has also been observed that antiferromagnetic ordering dominates ferromagnetic ordering as concentration is increased. Evidence for such a magnetic inhomogeneity in these samples has been confirmed from the variation in Mn3+/Mn4+ ion ratio from X-ray Photoelectron Spectroscopy and from the absorption peak studies using Ferromagnetic Resonance Spectroscopy.

AB - Mixed valence manganite system with monovalent sodium substituted lanthanum manganites form the basis of the present work. Lanthanum manganites belonging to the series La1-xNaxMnO3 with x=0.5-0.9 were synthesized using modified citrate gel method. Variation of lattice parameters and unit cell volume with Na concentration were analyzed and the magnetization measurements indicated ferromagnetic ordering in all samples at room temperature. Low temperature magnetization behavior indicated that all samples exhibit antiferromagnetism along with ferromagnetism and it has also been observed that antiferromagnetic ordering dominates ferromagnetic ordering as concentration is increased. Evidence for such a magnetic inhomogeneity in these samples has been confirmed from the variation in Mn3+/Mn4+ ion ratio from X-ray Photoelectron Spectroscopy and from the absorption peak studies using Ferromagnetic Resonance Spectroscopy.

KW - Lanthanum manganites

KW - Magnetic inhomogeneity

KW - Mixed valency

KW - Monovalent substitution

KW - Na concentration

KW - Oxygen vacancy

UR - http://www.scopus.com/inward/record.url?scp=84928902022&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84928902022&partnerID=8YFLogxK

U2 - 10.1016/j.jmmm.2015.04.092

DO - 10.1016/j.jmmm.2015.04.092

M3 - Article

VL - 391

SP - 75

EP - 82

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

ER -