Haigang Yang
Henan Normal University
Space chargeCrystal structureAnalytical chemistryMultiferroicsParamagnetismDielectricCeramicCrystallitePhase transitionAntiferromagnetismValence (chemistry)Tetragonal crystal systemDipoleExchange interactionMagnetic structureX-ray photoelectron spectroscopyMaterials scienceFerromagnetic material propertiesCondensed matter physicsBarrier layerBismuth ferriteMagnetizationOrthorhombic crystal systemMagnetoelectric effectNuclear magnetic resonanceMagnetic hysteresisCobaltGadoliniumCrystalDopingCurie temperaturePolaronFerroelectricityCrystallographyFerromagnetismDielectric lossDiamagnetism
5Publications
3H-index
67Citations
Publications 6
Newest
#1Guilin Song (Henan Normal University)H-Index: 2
#2Lei Chen (Henan Normal University)
Last. Na Zhang (Henan Normal University)H-Index: 3
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Abstract null null KNb1-xFexO3(x = 0–0.2) ceramics are prepared by the self-sacrificing method. The effects of Fe ion doping on the ferroelectricity, and magnetic properties of KNbO3 are studied. XRD analysis shows that all samples belong to the single-phase orthorhombic system with the space group of Amm2. The XPS test proves that Fe ions exist in the form of +2 and + 3 valence in KNbO3 sample, and the ratio of Fe2+/Fe3+ in the sample is calculated. SEM shows that Fe ions doping has a significa...
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#1Guilin Song (Henan Normal University)H-Index: 2
#2Yichen Song (SEU: Southeast University)H-Index: 1
Last. Na Zhang (Henan Normal University)H-Index: 3
view all 7 authors...
Abstract K1-xCaxNbO3 (x = 0–0.2) ceramic samples were prepared by self-sacrifice method to study the effects of Ca2+ doping on the crystal structure, dielectric properties and magnetic phase transition of KNbO3. XRD analysis showed that all samples belong to a single-phase orthogonal crystal system with a spatial group of Amm2. The valence states of K, Nb and O elements, the atomic proportion in K1-xCaxNbO3 (x = 0–0.2) samples, and the relationship between the binding energies of K, Nb and O and...
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#1Guilin Song (Henan Normal University)H-Index: 2
#2J. Su (Henan Normal University)H-Index: 3
Last. Na Zhang (Henan Normal University)H-Index: 3
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Abstract The effects of Cr3+ doping on the crystal structure, dielectric and magnetic phase transition of SmFeO3 have been investigated. The XRD pattern analysis shows that all the peaks for SmFe1-xCrxO3 samples can be indexed according to the crystal structure of pure SmFeO3 and has a fine crystal structure. The dielectric constants of SmFe1-xCrxO3 (x = 0.1–0.3) ceramics (er = 2532, 1959, 1172) are only 0.86, 0.67 and 0.41 times that of SmFeO3 (er = 2914) at 1 kHz, respectively. The change of d...
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#1Gui lin Song (Henan Normal University)H-Index: 1
#2J. Su (Henan Normal University)H-Index: 3
Last. Fanggao Chang (Henan Normal University)H-Index: 1
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This paper deals with the preparation of multiferroic Bi1−x Ca x FeO3(x = 0–0.2) ceramics with the sol–gel method and a study on the influence of Ca2+ doping on the structure, dielectric, and ferromagnetic properties of BiFeO3 ceramics. The result shows that the XRD analysis reveals a phase transition in Ca-doped BiFeO3 from rhombohedral to orthorhombic when x is greater than 0.1. The dielectric constant (e r) of Bi0.9Ca0.1FeO3 measured at 1 kHz is about seven times greater than that of BiFeO3, ...
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#1G.L. Song (Henan Normal University)H-Index: 3
#2J. Su (Henan Normal University)H-Index: 3
Last. Fanggao Chang (Henan Normal University)H-Index: 7
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Abstract Multiferroic trivalent gadolinium and cobalt co-substituted bismuth ferrite Bi 0.95 Gd 0.05 Fe 1− x Co x O 3 ( x =0, 0.05, 0.1, 0.15, 0.2) ceramics were prepared by rapid liquid phase sintering method. The results showed that all the peaks of X-ray Diffraction (XRD) for Bi 0.95 Gd 0.05 Fe 1− x Co x O 3 samples can be indexed according to the crystal structure of pure BiFeO 3 . XRD analysis revealed a phase transition in Gd 3+ and Co 3+ co-doped BiFeO 3 when x was larger than 0.1. The Sc...
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#1G.L. Song (Henan Normal University)H-Index: 3
#2He-Cai Zhang (Henan Normal University)H-Index: 6
Last. Fanggao Chang (Henan Normal University)H-Index: 7
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Abstract Multiferroic Bi 0.95 Sm 0.05 Fe 1− x Co x O 3 ( x =0−0.1) ceramics were prepared by the rapid liquid phase sintering method. For all the samples studied, the dielectric constant and dielectric loss decrease with increasing frequency in the range from 1 kHz to 1 MHz. It shows that the dielectric constant of Bi 0.95 Sm 0.05 FeO 3 at 10 kHz is about forty times larger than that of pure BiFeO 3 . This dramatic change in the dielectric properties of Bi 0.95 Sm 0.05 Fe 1− x Co x O 3 ( x =0−0....
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