Multiferroic, Phonon and Optical Properties of Pure and Ion-Doped YFeO3 Nanoparticles

Abstract

The magnetic, electric, phonon and optical properties of pure and ion-doped orthorhombic YFeO3 nanoparticles are studied for the first time theoretically. The spontaneous magnetization Ms in YFeO3 decreases with decreasing particle size. Ms is also shape dependent. The magnetization increases by Co and Er ion doping and decreases by Ti doping, which is caused by the different strain which appears in the nanoparticles and changes the exchange interaction constants in the doped states. The phonon energy for the Ag mode ω = 149 cm−1 and their damping decreases or increases with increasing temperature, respectively. Both show a kink near the Neel temperature, TN, which disappears by applying an external magnetic field. The influence of different ion doping on the band gap energy is also discussed. The doping effects can be used for different applications.

Structural and Magnetic Properties of Y0.85La0.15Fe1−(4/3)xTixO3 (where (x = 0, 0.025, 0.05 and 0.075) Nanomaterials Derived from Sol-Gel Route

“…9,10 To improve the magnetic behavior and optical properties of YFO, the researchers/scientists were tried to create the distorted orthorhombic structure via doping of different ionic radii atoms at either Y site or Fe site. [11][12][13][14][15] As a result of distorted crystal structure, the enhanced magnetization values were observed and reported in the literature. [11][12][13][14][15] In this regard Bhardwaj et al, prepared the distorted orthorhombic crystal structure of YFO by doping of Sm (15 mol%) and Nd (15 mol%).…”

Comparison of the Multiferroic Properties of Ion‐Doped Hexagonal LuFeO3 and LaFeO3

“…The tensile strain in the case of Sm‐ or Gd‐doped LuFO could be compared with ion‐doped YFeO (YFO) where the ionic radius of Y (1.04 Å) is nearly the same as that of Lu and thus smaller than the radius of the Sm or Gd doping ions. Recently, Apostolov et al [ 31 ] showed that decreases with increasing Sm concentration in YFO. It must be noted that with our model we can explain also the decrease of in La‐doped LuFO observed recently by Leelashree et al [ 16 ] where a tensile strain appears, because the ionic radius of the doping La ion is larger than that of the host Lu ion.…”

Enhancement in the Magnetic Properties of Yttrium Orthoferrite Materials by the Addition of BaO–Bi2O3–B2O3 Glass Sintering Aid

“…[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] Theoretical investigations have delved into the differences in multiferroic properties between hexagonal and orthorhombic ion-doped YFO nanoparticles. [23] Earlier research reports have highlighted the alterable structural and physical characteristics of YFO through changes in particle size, chelating agent, or adding magnetic or nonmagnetic ions at A-sites or B-sites. [15,16,18,[23][24][25][26][27] For instance, the altered magnetic properties of single phase of Y 1Àx Sc x FeO 3 (x = 0, 0.5, and 1) and Y 1Àx A x B y Fe 1Ày O 3 (where A = Gd 3þ , Nd 3þ , Sm 3þ and B = Ti 4þ ) nanoparticles have been observed.…”

“…[23] Earlier research reports have highlighted the alterable structural and physical characteristics of YFO through changes in particle size, chelating agent, or adding magnetic or nonmagnetic ions at A-sites or B-sites. [15,16,18,[23][24][25][26][27] For instance, the altered magnetic properties of single phase of Y 1Àx Sc x FeO 3 (x = 0, 0.5, and 1) and Y 1Àx A x B y Fe 1Ày O 3 (where A = Gd 3þ , Nd 3þ , Sm 3þ and B = Ti 4þ ) nanoparticles have been observed. [15,16,27] Apart from these, improved magnetic properties of YFO nanomaterial obtained from tartaric acid (as a chelating agent) compared to YFO nanomaterial obtained from citric acid, oxalic acid, and sucrose have been reported.…”