Multiferroic Properties of Pure and Transition Metal Doped LaFeO3Nanoparticles

The size, doping concentration, and magnetic field dependences of the magnetizationMand the real part of the dielectric function epsilon'in dopedLaFe1-xMxO3nanoparticles (NPs) are studied using a microscopic model. AlthoughMincreases,epsilon ' decreases with decreasing NPs size in pureLaFeO3. Doping with different ions causes different strain which modifies the exchange interaction. As a consequence,Mand epsilon ' grow with increasing Mn or Zn ion doping, whereas both quantities decrease by doping with Ti or Al ions. The magneto-dielectric coefficient increases with an applied external magnetic field and Mn doping concentration in pure and Mn-doped LaFeO(3)indicating that pure and dopedLaFeO3NPs exhibit a multiferroic behavior. A microscopic model is proposed to study multiferroic Bi(2)NiMnO(6)thin films.

Automated summary

The size, doping, and magnetic field affect the magnetization and dielectric function of doped LaFe1-xMxO3 nanoparticles. Different ions doping leads to changes in exchange interaction and strain, affecting the magnetic behavior. The multiferroic behavior is observed in pure and doped LaFeO3 nanoparticles with increasing magnetic field and doping concentration.