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Effect of Samarium on Multiferroic Properties of Lanthanum Ferrite Nanoparticles

Students & Supervisors

Student Authors
Afia Farzana
BSc in Computer Science & Engineering, FST
Imtiaz Ahmed
BSc in Industrial & Production Engineering, FE
Supervisors
Dr. Shovan Kumar Kundu
Assistant Professor, Faculty, FST

Abstract

Over the last couple of decades, a small word with immense potential has rapidly bloomed into human awareness. The word is ‘nano’. At the start of the twenty-first century, nano has become the necessity of the present from the necessity of the future. The word is ‘nano’ which possesses a tiny scale range that is larger than the level of atoms and molecules but within the range of 1-100 nanometers. Multiferroics are materials in which at least two ferroic properties (ferromagnetism, ferroelectric and/ferroelastic) could be used simultaneously and are intrinsically coupled together. Because of strong magneto-electric coupling, multiferroic materials have a vast area of application in spintronics devices, information storage devices, quantum electromagnets, microelectronics devices, and different types of sensors. Interestingly, it was found that Lanthanum Ferrite (LaFeO3), a member of the centrosymmetric rare earth ortho-ferrite (RFeO3) family (having a distorted orthorhombic perovskite structure), possesses magnetically tunable ferroelectricity due to the exchange striction mechanism. XRD patterns, along with Rietveld refinement were analyzed to ensure the phase formation and crystallographic nature. Reduction of particle size and nanocrystallinity nature was studied in TEM analysis. Physics behind electronic states of different atoms was illustrated by XPS analysis. DC and AC conduction mechanism and charge transport mechanism are illustrated in association with Mott’s variable range hopping (VRH) model and correlated barrier hopping (CBH) model respectively. The resistivity (DC & AC) is increased with a markable amount by virtue of Sm substitution. An improvement of dielectric properties is observed where dielectric loss is reduced due to the reduction of oxygen vacancies. Positive magneto-dielectric coupling is observed in the samples where coupling increases with doping which states that the Sm doped LaFeO3 can be good candidate in in magneto-electric industries.

Keywords

Multiferroics Lanthanum Ferrite Magnetic Properties Electrical Properties

Publication Details

  • Type of Publication: Conference
  • Conference Name: International Conference on Physics-2024
  • Date of Conference: 05/09/2024 - 05/11/2024
  • Venue: Atomic Energy Centre, Dhaka
  • Organizer: Bangladesh Physical Society
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