[1] DONG S, LIU J M, CHEONG S W et al. Multiferroic materials and magnetoelectric physics: symmetry, entanglement, excitation, and topology. Advances in Physics, 64, 519-626(2015). http://www.tandfonline.com/doi/full/10.1080/00018732.2015.1114338

[2] EERENSTEIN W, MATHUR N D, SCOTT J F. Multiferroic and magnetoelectric materials. Nature, 442, 759-765(2006). http://www.nature.com/articles/nature05023

[3] KIMURA T, GOTO T, SHINTANI H et al. Magnetic control of ferroelectric polarization. Nature, 426, 55-58(2003). http://www.nature.com/articles/nature02018

[4] CORASANITI M, BARONE P, NUCARA A et al. Electronic bands and optical conductivity of the Dzyaloshinsky-Moriya multiferroic Ba2CuGe2O7. Physical Review B, 96, 085115(2017). http://link.aps.org/doi/10.1103/PhysRevB.96.085115

[5] CHEN L, JIA Y, ZHAO J et al. Strong piezoelectric-catalysis in barium titanate/carbon hybrid nanocomposites for dye wastewater decomposition. Journal of Colloid & Interface Science, 586, 758-765(2021).

[6] XU X, WU Z, XIAO L et al. Strong pieo-electro-chemical effect of piezoelectric BaTiO3 nanofibers for vibration-catalysis. Journal of Alloys and Compounds, 762, 915-921(2018). https://linkinghub.elsevier.com/retrieve/pii/S0925838818320061

[7] XIA Y, JIA Y, QIAN W et al. Pyroelectrically induced pyro- electro-chemical catalytic activity of BaTiO3 nanofibers under room-temperature cold-hot cycle excitations. Metals, 7, 122(2017). http://www.mdpi.com/2075-4701/7/4/122

[8] WANG K F, LIU J M, REN Z F. Multiferroicity: the coupling between magnetic and polarization orders. Advances in Physics, 58, 321-448(2009). http://www.tandfonline.com/doi/abs/10.1080/00018730902920554

[9] BENEDEK N A, FENNIE C J. Why are there so few perovskite ferroelectrics?. The Journal of Physical Chemistry C, 117, 13339-13349(2013). https://pubs.acs.org/doi/10.1021/jp402046t

[10] HILL N A. Why are there so few magnetic ferroelectrics?. The Journal of Physical Chemistry B, 104, 6694-6709(2000). https://pubs.acs.org/doi/10.1021/jp000114x

[11] HIROYUKI N, KATAYAMA-YOSHIDA H. Theoretical prediction of magnetic properties of Ba(Ti1-xMx)O3 (M=Sc,V,Cr,Mn,Fe,Co, Ni,Cu). Japanese Journal of Applied Physics, 40, L1355-L1358(2001). https://iopscience.iop.org/article/10.1143/JJAP.40.L1355

[12] SONG C, WANG C, LIU X et al. Room temperature ferromagnetism in cobalt-doped LiNbO3 single crystalline films. Crystal Growth & Design, 9, 1235-1239(2009). https://pubs.acs.org/doi/10.1021/cg800754b

[13] REN Z, XU G, WEI X et al. Room-temperature ferromagnetism in Fe-doped PbTiO3 nanocrystals. Applied Physics Letters, 91, 063106(2007). http://aip.scitation.org/doi/10.1063/1.2766839

[14] KUMAR M, YADAV K L. Observation of room temperature magnetoelectric coupling in a Ni substituted Pb1-xNixTiO3 system. Journal of Applied Physics, 102, 076107(2007). http://aip.scitation.org/doi/10.1063/1.2785007

[15] DANG N V, THE-LONG P, THANH T D et al. Structural phase separation and optical and magnetic properties of BaTi1-xMnxO3 multiferroics. Journal of Applied Physics, 111, 113913(2012). http://aip.scitation.org/doi/10.1063/1.4725195

[16] ZHOU L, ZHANG Y, LI S et al. Fe doping effect on the structural, ferroelectric and magnetic properties of polycrystalline BaTi1-xFexO3 ceramics. Journal of Materials Science: Materials in Electronics, 31, 14487-14493(2020). https://doi.org/10.1007/s10854-020-04008-z

[17] RUBAVATHI P E, VENKIDU L, BABU M V G et al. Structure, morphology and magnetodielectric investigations of BaTi1-xFexO3-δ ceramics. Journal of Materials Science-Materials in Electronics, 30, 5706-5717(2019). https://doi.org/10.1007/s10854-019-00864-6

[18] RANI A, KOLTE J, VADLA S S et al. Structural, electrical, magnetic and magnetoelectric properties of Fe doped BaTiO3 ceramics. Ceramics International, 42, 8010-8016(2016). https://linkinghub.elsevier.com/retrieve/pii/S0272884216002510

[19] GHEORGHIU F, CIOMAGA C E, SIMENAS M et al. Preparation and functional characterization of magnetoelectric Ba(Ti1-xFex)O3-x/2 ceramics. Application for a miniaturized resonator antenna. Ceramics International, 44, 20862-20870(2018). https://linkinghub.elsevier.com/retrieve/pii/S0272884218321497

[20] PHAN T L, THANG P D, HO T A et al. et al. Local geometric and electronic structures and origin of magnetism in Co-doped BaTiO3 multiferroics. Journal of Applied Physics, 117(2015).

[21] PHONG P T, HUY B T, LEE Y I et al. Polymorphs and dielectric properties of BaTi1-xNixO3. Journal of Alloys and Compounds, 583, 237-243(2014). https://linkinghub.elsevier.com/retrieve/pii/S0925838813020756

[22] DAS S, GHARA S, MAHADEVAN P et al. Designing a lower band gap bulk ferroelectric material with a sizable polarization at room temperature. ACS Energy Letters, 3, 1176-1182(2018). https://pubs.acs.org/doi/10.1021/acsenergylett.8b00492

[23] ZHENG D, DENG H, SI S et al. Modified structural, optical, magnetic and ferroelectric properties in (1-x)BaTiO3- xBaCo0.5Nb0.5O3-δ ceramics. Ceramics International, 46, 6073-6078(2020). https://linkinghub.elsevier.com/retrieve/pii/S0272884219332572

[24] N V, DUNG N T, PHONG P T et al. Effect of Fe3+ substitution on structural, optical and magnetic properties of barium titanate ceramics. Physica B: Condensed Matter, 457, 103-107(2015). https://linkinghub.elsevier.com/retrieve/pii/S0921452614007868

[25] ZHENG D, DENG H, PAN Y et al. Modified multiferroic properties in narrow bandgap (1-x)BaTiO3-xBaNb1/3Cr2/3O3-δ ceramics. Ceramics International, 46, 26823-26828(2020). https://linkinghub.elsevier.com/retrieve/pii/S0272884220321714

[26] DAS S K, MISHRA R N, ROUL B K. Magnetic and ferroelectric properties of Ni doped BaTiO3. Solid State Communications, 191, 19-24(2014). https://linkinghub.elsevier.com/retrieve/pii/S0038109814001513

[27] VENKATESWARAN U D, NAIK V M, NAIK R. High-pressure Raman studies of polycrystalline BaTiO3. Physical Review B, 58, 14256-14260(1998). https://link.aps.org/doi/10.1103/PhysRevB.58.14256

[28] ROBINS L H, KAISER D L, ROTTER L D et al. Investigation of the structure of barium titanate thin films by Raman spectroscopy. Journal of Applied Physics, 76, 7487-7498(1994). http://aip.scitation.org/doi/10.1063/1.357978

[29] POKORNÝ J, PASHA U M, BEN L et al. Use of Raman spectroscopy to determine the site occupancy of dopants in BaTiO3. Journal of Applied Physics, 109, 114110(2011). http://aip.scitation.org/doi/10.1063/1.3592192

[30] ZAYTSEVA I V, PUGACHEV A M, OKOTRUB K A et al. Residual mechanical stresses in pressure treated BaTiO3 powder. Ceramics International, 45, 12455-12460(2019). https://linkinghub.elsevier.com/retrieve/pii/S0272884219307321

[31] SHUAI Y, ZHOU S, BÜRGER D et al. Decisive role of oxygen vacancy in ferroelectric versus ferromagnetic Mn-doped BaTiO3 thin films. Journal of Applied Physics, 109, 084105(2011). http://aip.scitation.org/doi/10.1063/1.3576125

[32] COEY J M D, VENKATESAN M, FITZGERALD C B. Donor impurity band exchange in dilute ferromagnetic oxides. Nature Materials, 4, 173-179(2005). https://doi.org/10.1038/nmat1310

[33] COEY J M D, DOUVALIS A P, FITZGERALD C B et al. Ferromagnetism in Fe-doped SnO2 thin films. Applied Physics Letters, 84, 1332-1334(2004). http://aip.scitation.org/doi/10.1063/1.1650041

[34] MOSTARI M S, HAQUE M J, RAHMAN ANKUR S et al. Effect of mono-dopants (Mg2+) and co-dopants (Mg2+, Zr4+) on the dielectric, ferroelectric and optical properties of BaTiO3 ceramics. Materials Research Express, 7, 066302(2020). https://doi.org/10.1088/2053-1591/ab7e4c

[35] WENG B, XIAO Z, MENG W et al. Bandgap engineering of barium bismuth niobate double perovskite for photoelectronchemical water oxidation. Advanced Energy Materals, 7, 1602260(2017).

[36] YANG F, YANG L, AI C et al. Tailoring bandgap of perovskite BaTiO3 by transition metals Co-doping for visible-light photoelectrical applications: a first-principles study. Nanomaterials, 8, 455(2018). http://www.mdpi.com/2079-4991/8/7/455

[37] YIN J, ZOU Z, YE J. A novel series of the new visible-light- driven photocatalysts MCo1/3Nb2/3O3 (M=Ca, Sr, and Ba) with special electronic structures. The Journal of Physical Chemistry B, 107, 4936-4941(2003). https://pubs.acs.org/doi/10.1021/jp0340919