Structural, magnetic and magnetocaloric properties of Nanostructured La0.5Bi0.2Sr0.3MnO3 perovskites

Anita D. Souza, M. S. Murari, Mamatha D. Daivajna

Research output: Contribution to journalArticle

Abstract

Nanostructured La0.5Bi0.2Sr0.3MnO3 samples were synthesized by high energy planetary ball milling to study the effect of milling time on crystal structure, particle size and magnetic properties. Addition of 20% Bi at La site in La0.7Sr0.3MnO3 matrix suppresses ferromagnetism significantly. On increasing the milling time from bulk (0 h) to 48 h the particle size reduces from 173 nm to 22 nm. The ferromagnetic ordering temperature decrease from 312 K to 302 K, with drastic decrease in the magnitude of magnetization as milling times changes to 48 h. Based on phenomenological model, the magnetocaloric properties have been studied. The diminished values in change of magnetic entropy with increase of milling time may be described by the evolution of disordered magnetic states on the surface of nanoparticles. It is interesting to notice that 20% Bi for La site plays an important role in controlling the particle size and modifying the magnetic properties.

Original languageEnglish
Article number411909
JournalPhysica B: Condensed Matter
Volume580
DOIs
Publication statusPublished - 01-03-2020

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perovskites
Particle size
magnetic properties
Magnetic properties
Milling (machining)
Ferromagnetism
Ball milling
Magnetization
Entropy
Crystal structure
Nanoparticles
ferromagnetism
balls
entropy
nanoparticles
magnetization
crystal structure
Temperature
matrices
temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

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title = "Structural, magnetic and magnetocaloric properties of Nanostructured La0.5Bi0.2Sr0.3MnO3 perovskites",
abstract = "Nanostructured La0.5Bi0.2Sr0.3MnO3 samples were synthesized by high energy planetary ball milling to study the effect of milling time on crystal structure, particle size and magnetic properties. Addition of 20{\%} Bi at La site in La0.7Sr0.3MnO3 matrix suppresses ferromagnetism significantly. On increasing the milling time from bulk (0 h) to 48 h the particle size reduces from 173 nm to 22 nm. The ferromagnetic ordering temperature decrease from 312 K to 302 K, with drastic decrease in the magnitude of magnetization as milling times changes to 48 h. Based on phenomenological model, the magnetocaloric properties have been studied. The diminished values in change of magnetic entropy with increase of milling time may be described by the evolution of disordered magnetic states on the surface of nanoparticles. It is interesting to notice that 20{\%} Bi for La site plays an important role in controlling the particle size and modifying the magnetic properties.",
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year = "2020",
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Structural, magnetic and magnetocaloric properties of Nanostructured La0.5Bi0.2Sr0.3MnO3 perovskites. / Souza, Anita D.; Murari, M. S.; Daivajna, Mamatha D.

In: Physica B: Condensed Matter, Vol. 580, 411909, 01.03.2020.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Structural, magnetic and magnetocaloric properties of Nanostructured La0.5Bi0.2Sr0.3MnO3 perovskites

AU - Souza, Anita D.

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AB - Nanostructured La0.5Bi0.2Sr0.3MnO3 samples were synthesized by high energy planetary ball milling to study the effect of milling time on crystal structure, particle size and magnetic properties. Addition of 20% Bi at La site in La0.7Sr0.3MnO3 matrix suppresses ferromagnetism significantly. On increasing the milling time from bulk (0 h) to 48 h the particle size reduces from 173 nm to 22 nm. The ferromagnetic ordering temperature decrease from 312 K to 302 K, with drastic decrease in the magnitude of magnetization as milling times changes to 48 h. Based on phenomenological model, the magnetocaloric properties have been studied. The diminished values in change of magnetic entropy with increase of milling time may be described by the evolution of disordered magnetic states on the surface of nanoparticles. It is interesting to notice that 20% Bi for La site plays an important role in controlling the particle size and modifying the magnetic properties.

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