Decisive role of oxygen vacancy in ferroelectric vs. ferromagnetic Mn-doped BaTiO3 thin films
Yao Shuai,Shengqiang Zhou,Danilo Bürger,Helfried Reuther,Ilona Skorupa,Varun John,Manfred Helm,Heidemarie Schmidt +7 more
TLDR
In this paper, the existence of spontaneous magnetization in Mn-doped polycrystalline BaTiO3 thin films was shown to be inconsistent with the presence of ferroelectricity.Abstract:
Single-phase perovskite 5 at.% Mn-doped and undoped polycrystalline BaTiO3 thin films have been grown under different oxygen partial pressures by pulsed laser deposition on platinum-coated sapphire substrates. Ferroelectricity is only observed for the Mn-doped and undoped BaTiO3 thin films grown under relatively high oxygen partial pressure. Compared to undoped BaTiO3, Mn-doped BaTiO3 reveals a low leakage current, increased dielectric loss, and a decreased dielectric constant. Ferromagnetism is seen on Mn-doped BaTiO3 thin films prepared under low oxygen partial pressure and is attributed to the formation of bound magnetic polarons (BMPs). This BMP formation is enhanced by oxygen vacancies. The present work confirms a theoretical work from C. Ederer and N. Spaldin on ferroelectric perovskites [Nature Mat. 3, 849 (2004)] which shows that the existence of ferroelectricity is incompatible with the existence of a spontaneous magnetization in Mn-doped BaTiO3 thin films.read more
Citations
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Induced magnetism and magnetoelectric coupling in ferroelectric BaTiO3 by Cr-doping synthesized by a facile chemical route
Jyoti Shah,R.K. Kotnala +1 more
TL;DR: In this paper, a single step metal-organic decomposition (MOD) method was used to synthesize pure phase barium titanate (BTO) and Cr doped BTO.
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Magnetic and ferroelectric properties of Ni doped BaTiO3
TL;DR: In this article, structural, magnetic and ferroelectric properties of Ni doped barium titanate were investigated using solid state sintering technique and it was revealed from structural studies that the phase transformation from tetragonal to hexagonal phase is strongly influenced by Ni doping concentration.
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Reversible Luminescence Modulation upon Photochromic Reactions in Rare-Earth Doped Ferroelectric Oxides by in Situ Photoluminescence Spectroscopy.
TL;DR: A double-exponential relaxation model is proposed, and a combined equation is adopted to well describe the luminescence response to light irradiation, being in agreement with the experimental data.
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Origin of ferromagnetism in transition metal doped BaTiO3
TL;DR: In this article, the temperature, magnetic field, and ion doping dependence of the magnetic and electric properties in Fe-doped BaTiO3 were calculated using a microscopic model and the Green's function technique.
Journal ArticleDOI
Effect of Fe-doping on the structure and magnetoelectric properties of (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 synthesized by a chemical route
E. Venkata Ramana,F. Figueiras,Amit Mahajan,David M. Tobaldi,Benilde F.O. Costa,M.P.F. Graça,M.A. Valente +6 more
TL;DR: In this article, the effect of doping on the physical properties of a b-site Fe-doped (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 was investigated.
References
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Journal ArticleDOI
Zener Model Description of Ferromagnetism in Zinc-Blende Magnetic Semiconductors
TL;DR: Zener's model of ferromagnetism, originally proposed for transition metals in 1950, can explain T(C) of Ga(1-)(x)Mn(x)As and that of its II-VI counterpart Zn(1)-Mn (x)Te and is used to predict materials with T (C) exceeding room temperature, an important step toward semiconductor electronics that use both charge and spin.
Journal ArticleDOI
Multiferroic and magnetoelectric materials
TL;DR: A ferroelectric crystal exhibits a stable and switchable electrical polarization that is manifested in the form of cooperative atomic displacements that arises through the quantum mechanical phenomenon of exchange.
Journal ArticleDOI
Epitaxial BiFeO3 multiferroic thin film heterostructures.
Jian Wang,Jeffrey B. Neaton,Haimei Zheng,Valanoor Nagarajan,Satishchandra Ogale,B. T. Liu,Dwight Viehland,V. Vaithyanathan,Darrell G. Schlom,Umesh V. Waghmare,Nicola A. Spaldin,Karin M. Rabe,Manfred Wuttig,Ramamoorthy Ramesh +13 more
TL;DR: Enhanced polarization and related properties in heteroepitaxially constrained thin films of the ferroelectromagnet, BiFeO3, and combined functional responses in thin film form present an opportunity to create and implement thin film devices that actively couple the magnetic and ferroelectric order parameters.
Journal ArticleDOI
Magnetic control of ferroelectric polarization
Tsuyoshi Kimura,Tsuyoshi Kimura,Takeshi Goto,Hiroshi Shintani,Kyoko Ishizaka,Taka-hisa Arima,Yoshinori Tokura +6 more
TL;DR: The discovery of ferroelectricity in a perovskite manganite, TbMnO3, where the effect of spin frustration causes sinusoidal antiferromagnetic ordering and gigantic magnetoelectric and magnetocapacitance effects are found.
Journal ArticleDOI
Donor impurity band exchange in dilute ferromagnetic oxides.
TL;DR: It is proposed thatferromagnetic exchange here, and in dilute ferromagnetic nitrides, is mediated by shallow donor electrons that form bound magnetic polarons, which overlap to create a spin-split impurity band.