The influence of Co doping on the dielectric, ferroelectric and ferromagnetic properties of Ba0.70Sr0.30TiO3 thin films

Gao, Lina; Zhai, Jiwei; Yao, Xi

doi:10.1016/j.apsusc.2008.11.064

Cited by 38 publications

(16 citation statements)

References 26 publications

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“…When ZnO content change from 0.5 wt% to 20 wt%, the dielectric constant decreases from the maximum value of 1935 to the minimum value of 818. The dielectric constant is mainly dependent on A or B ionic radius and crystal cell size [10]. When ZnO content is less than 2 wt%, Zn 2+ will substitute Ti 4+ to increase Ti-O octahedral volume, which enlarges anharmonic vibration space of oxide ion, resulting in the increase of dielectric constant of BMAZ ceramics.…”

Section: Resultsmentioning

confidence: 99%

“…Ferroelectric and dielectric properties of BST ceramics strongly depend on the sintering conditions, grain size, porosity, doping amount and structural defects [9][10][11]. These parameters as well as dielectric properties may also be modified by the substitution of selected elements for A or B site atoms of the ABO 3 perovskite structure [12].…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and dielectric properties of highly tunable Ba0.6Sr0.4TiO3/MgO/Al2O3/ZnO composite

Gao

Liu

et al. 2012

Journal of Alloys and Compounds

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure and dielectric properties of highly tunable Ba0.6Sr0.4TiO3/MgO/Al2O3/ZnO composite

Gao

Liu

et al. 2012

Journal of Alloys and Compounds

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“…It can only be substituted in B site of BTO [14] . Earlier reports [10,12] showed that induction of magnetism in BTO sharply deteriorates its ferroelectricity. Theoretical calculation of Kaoru Miura et al [15] showed that Coulomb repulsions between Ti 3s and 3p states and O 2s and 2p states have an important role for the appearance of Ti ion displacement, which causes ferroelectricity in BTO.…”

Section: Introductionmentioning

confidence: 97%

“…The transition metal ions in BTO ceramics are of special interest as they can induce magnetism in BTO [8][9][10][11][12]. Dang et al [1] showed that room temperature ferromagnetic order exists in BaTi 1x Fe x O 3 .…”

Section: Introductionmentioning

confidence: 99%

Effect of equiproprotional substitution of Zn and Mn in BaTiO3 ceramic—An index to multiferroic applications

Das¹,

Rout²,

Pradhan³

et al. 2012

J Adv Ceram

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This paper reports that ferromagnetism (FM) can be induced in ferroelectric barium titanate (BaTiO 3 ) ceramic with selection of appropriate substituents like Zn and Mn. High density polycrystalline samples of Zn and Mn substituted BaTiO 3 (Ba 1x Zn x Ti 1x Mn x O 3 , x=0, 0.02, 0.04, 0.06, 0.08 and 0.1) were prepared using slow step solid state sintering technique to study the effect of equiproprotional substituents on structural, ferroelectric and magnetic properties of BaTiO 3 (BTO). High precision electrical and magnetic measurements were carried out along with XRD, XPS, and SEM to understand and co-relate magnetic and ferroelectric hysteresis loop observed at room temperature with different values of 'x'. It is seen that ferroelectric hysteresis loop (P~E) is deteriorated (became lossy type) with the increase of Zn and Mn concentration. However, at x=0.1, the material showed the signature of room temperature ferromagnetism, which is an index for BTO to became a promising material for multiferroic applications. M~H loops observed in Zn and Mn substituted BTO are expected to be due to the formation of oxygen vacancies and exchange interaction induced magnetism.

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“…The most commonly used surface modification techniques involve chemical treatment, electrochemical treatment, photoirradiation or phototreatments with ionized gases, i.e., microwaves, radiofrequency, glow discharge plasmas, and direct fluorination with fluorine gas. [9][10][11][12][13][14] Among these, the physical properties and chemical reactivates of organic molecules or carbon materials can be dramatically affected by fluorination. The high ionization potential of fluorine and its relatively low polarizability imply very weak intermolecular interactions, low surface energies, and low refractive indexes for perfluorocarbon.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fluorination on Electrical Behaviors of Carbon Blacks-filled HDPE Polymeric Switch

Seo¹,

Park

2009

Bulletin of the Korean Chemical Society

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Electrical properties of a fluorinated carbon black (CB)-filled high-density polyethylene (HDPE) polymeric switch were investigated as a function of fluorination pressure at 0.1 ~ 0.4 MPa. From the FT-IR results, the absorption spectra of the fluorinated CB show an absorption band at 1400 ~ 1000 cm -1 for νC-F and the peak intensity increased with increasing fluorination pressure. Also, the analysis of XPS spectra of the fluorinated CB indicated that fluorine content increased with increasing fluorination pressure. Meanwhile, the surface free energy of the fluorinated CB decreased with increasing fluorination pressure. Consequently, the increase of fluorine contents of CB made a disappearance of negative temperature coefficient (NTC) behavior of the polymeric switch, which was probably due to the reduction of CB reaggregation after melting point of the HDPE, resulted from the decreasing of London dispersive component of the surface free energy for CB particles.

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The influence of Co doping on the dielectric, ferroelectric and ferromagnetic properties of Ba0.70Sr0.30TiO3 thin films

Cited by 38 publications

References 26 publications

Microstructure and dielectric properties of highly tunable Ba0.6Sr0.4TiO3/MgO/Al2O3/ZnO composite

Microstructure and dielectric properties of highly tunable Ba0.6Sr0.4TiO3/MgO/Al2O3/ZnO composite

Effect of equiproprotional substitution of Zn and Mn in BaTiO3 ceramic—An index to multiferroic applications

Effect of Fluorination on Electrical Behaviors of Carbon Blacks-filled HDPE Polymeric Switch

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