. 2023 May 26;9(6):e16601. doi: 10.1016/j.heliyon.2023.e16601

Table 4.

The rare earth elements as a dopant in magnetic ferrites.

Metal ferrite NPs	Dopants	Preparation method	References
CoFe₂O₄	Eu³⁺	Solvothermal	[156]
CoFe₂O₄	Eu³⁺	Co-precipitation	[157]
CoFe₂O₄	Eu³⁺	Precipitation & Hydrothermal	[158]
BiFeO₃	Eu³⁺	Sol-gel	[159]
BiFeO₃	Eu³⁺	Sol-gel	[160]
CuFe₂O₄	Eu³⁺	Solution combustion	[161]
BiFeO₃	Eu³⁺ and Ni⁺²	Sol-gel	[162]
GaFeO₃	In⁺³	Solid- state reaction	[163]
Ni–CoFe₂O₄	In⁺³	Co-precipitation	[164]
Mg–Ag–MnFe₂O₄	In⁺³	Sol-gel auto-combustion	[165]
CuFe₂O₄	In⁺³	Sol-gel	[166]
Cu–NiFe₂O₄	In⁺³	Sol-gel auto -ignition	[167]
CoFe₂O₄	Pr⁺³	Hydrothermal	[168]
CoFe₂O₄	Pr⁺³	Sol–gel auto-combustion	[169]
CuFe₂O₄	Pr⁺³	Sol-gel	[170]
BiFeO₃	Pr⁺³	Sol-gel	[171]
Ni–Mn–ZnFe₂O₄	Pr⁺³	Sol-gel	[172]
ZnFe₂O₄	Sm⁺³	Co-precipitation	[173]
Ni–CoFe₂O₄	Sm⁺³	Sol-gel	[174]
BiFeO₃	Sm⁺³ and Co⁺³	Sol-gel	[175]
BiFeO₃	Sm⁺³ and Co⁺³	Sol-gel	[176]
NiFe₂O₄	Sm⁺³	Sol-gel auto combustion	[177]
Cu–CoFe₂O₄	Sm⁺³	Citrate combustion	[178]
Mn–ZnFe₂O₄	Sm⁺³ and Gd³⁺	Solution combustion	[179]
CuFe₂O₄	Tm³⁺	Sol-gel	[180]
NiFe₂O₄	Tm³⁺	Sol-gel	[181]
CoFe_2-xHo_xO₄	Ho³⁺	Solid state reaction	[182]
Cu–ZnFe₂O₄	Ho³⁺	Sol-gel	[183]
Mn–ZnFe₂O₄	Ho³⁺ and Dy³⁺	Solution combustion	[184]
BiFeO₃	Er³⁺	Citrate-gel auto-combustion	[185]
CoFe₂O₄	Er³⁺	Microemulsion	[186]
Cu–CdFe₂O₄	Er³⁺	Citrate-gel auto-combustion	[187]
Co–ZnFe₂O₄	La³⁺	Sol-gel	[188]
Zn–CuFe₂O₄	La³⁺	Co-precipitation	[189]
CoFe₂O₄	La³⁺	Co-precipitation	[190]
CeFe₂O₄	La³⁺	Hydrothermal & Co-precipitation	[191]
Ni–CuFe₂O₄	Ce²⁺	Co-precipitation	[192]
MnFe₂O₄	Ce²⁺	Auto-combustion	[193]
Cu–Cd–CoFe₂O₄	Ce³⁺	Co-precipitation	[194]