Interface polarity brings a way to modulate magneto-optical effect of cubic Ni2+/Fe3+ co-doped Bi25FeO40 film: Implications in piezoelectricity - Details

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Abstract：

Cubic　Sillenite　Bi25FeO40　(BFO)　could　become　a　new　magneto-optical　material　due　to　its　high　concentration　of　Bi3+　and　no　birefringence.　But　its　weak　magnetism　causes　the　magneto-optical　properties　to　be　far　from　the　requirements　of　practical　applications.　Doping　magnetic　Fe3+　and　Ni2+　ions　to　improve　the　magnetism　and　magneto-optical　properties　of　BFO　(Bi19Ni2.8Fe4.2O40)　film　on　fluorine-doped　tin　oxide　(BNFO/FTO)　is　discussed　in　this　paper.　Another　focus　of　this　paper　is　to　discuss　the　magneto-optical　properties　modulated　by　the　electric　field.　The　cubic　BNFO　film　has　weak　piezoelectric　effects,　which　makes　it　difficult　to　modulate　its　magneto-optical　effect　by　electric　field.　A　polarity　symmetry　induced　by　the　Schottky　junction　between　Au　metal　layer　and　BNFO　semiconductor　layer　(Au/BNFO)　compensates　for　cubic　symmetry,　and　the　piezoelectric　effect　can　be　improved.　By　applying　an　electric　field,　its　magnetic　circular　dichroism　(MCD)　ellipticity　|ΨF|　gradually　decreases　as　a　direct　current　voltage　from　0　V　to　10　V　in　a　magnetic　field　of　2500　Oe,　demonstrating　the　feasibility　of　this　strategy.　These　results　indicate　a　new　way　for　highly　symmetric　magneto-optical　materials　to　modulate　magneto-optical　effects　in　electric　fields.　©　2024　Elsevier　B.V.

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Au/BNFO/FTO film Magneto-electric coupling Magneto-optical effect Piezoelectric effect

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[ 1 ] [Gao T.]College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 2 ] [Wu J.]College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 3 ] [Liang J.]College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 4 ] [Wang C.]College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 5 ] [Liu M.]College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 6 ] [Yang Y.]College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 7 ] [Yang Y.]Fujian Provincial Key Laboratory of Advanced Inorganic Oxygenated Materials, Fuzhou, 350108, China
[ 8 ] [Cao Q.]College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 9 ] [Chen X.]College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 10 ] [Chen X.]Fujian Provincial Key Laboratory of Advanced Inorganic Oxygenated Materials, Fuzhou, 350108, China
[ 11 ] [Hu X.]College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 12 ] [Hu X.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 13 ] [Zhuang N.]College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 14 ] [Zhuang N.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 15 ] [Zhuang N.]Fujian Provincial Key Laboratory of Advanced Inorganic Oxygenated Materials, Fuzhou, 350108, China

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Interface polarity brings a way to modulate magneto-optical effect of cubic Ni2+/Fe3+co-doped Bi25FeO40 film: Implications in piezoelectricity
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Source ：

Applied Surface Science

ISSN： 0169-4332

Year： 2024

Volume： 659

6 . 3 0 0

JCR@2023

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