Structural, Electrical and Magnetic Properties of Modified Bi1/2Na1/2TiO3 - Modified CFO Based Magnetostrictive (Co0.6Zn0.4Fe1.7Mn0.3O4) Particulate Nanocomposite

2017 ◽  
Vol 886 ◽  
pp. 13-16
Author(s):  
Mintu Tyagi ◽  
Vinod Kumar ◽  
Gurpreet Kaur ◽  
Puneet Sharma
Keyword(s):  
Magnetic Properties ◽  
Magnetic Measurements ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
Hysteresis Loops ◽  
Lead Free ◽  
Great Opportunity ◽  
Electrical And Magnetic Properties ◽  
Device Applications ◽  
Two Phases

Lead free Multiferroic composites that comprise Co0.6Zn0.4Fe1.7Mn0.3O4 (CZFMO) and 72.5(Bi1/2Na1/2TiO3)-22.5(Bi1/2K1/2TiO3)-5(BiMg1/2Ti1/2O3) (BNT-BNT-BMgT) were synthesized using sol-gel method and it’s structural, ferroelectric and magnetic properties were studied. The X-ray diffraction displayed the single phase formation of parent phases and the presence of two phases in the composites. The samples showed a well saturated polarization-electric field hysteresis loops. The remnant polarization and saturation polarization values are decreased with increasing ferrite content. Room temperature (RT) magnetic measurements show that composites are soft magnetic. The composite with x = 0.2, showed the enhanced magnetic and ferroelectric properties. Moreover, these ME composites provide a great opportunity as potential lead free systems for multifuntional device applications.

Synthesis and Ferroelectric Properties of Sol–Gel Derived Intergrowth-Superlattice-Structured SrBi4Ti4O15-Bi4Ti3O12 Thin Films

2011 ◽  
Vol 197-198 ◽  
pp. 1781-1784
Author(s):  
Hua Wang ◽  
Jian Li ◽  
Ji Wen Xu ◽  
Ling Yang ◽  
Shang Ju Zhou
Keyword(s):  
Thin Films ◽  
Remanent Polarization ◽  
Annealing Temperature ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
Hysteresis Loops ◽  
Si Substrates ◽  
Gel Processing ◽  
Coercive Electric Field ◽  
Clockwise Hysteresis

Intergrowth-superlattice-structured SrBi4Ti4O15–Bi4Ti3O12(SBT–BIT) films prepared on p-Si substrates by sol-gel processing. Synthesized SBT–BIT films exhibit good ferroelectric properties. As the annealing temperature increases from 600°C to 700°C, the remanent polarization Prof SBT–BIT films increases, while the coercive electric field Ecdecreases. SBT–BIT films annealed at 700°C have a Prvalue of 18.9µC/cm2which is higher than that of SBT (16.8µC/cm2) and BIT (14.6µC/cm2), and have the lowest Ecof 142 kV/cm which is almost the same as that of SBT and BIT. The C-V curves of Ag/SBT-BIT/p-Si heterostructures show the clockwise hysteresis loops which reveal the memory effect due to the polarization. The memory window in C-V curve of Ag/SBT-BIT/p-Si is larger than that of Ag/SBT/p-Si heterostructure or Ag/BIT/p-Si heterostructure.

Electrical and Magnetic Properties of Barium Hexaferrite Modified Barium Zirconium Titanate Lead-Free Ceramics

2019 ◽  
Vol 19 (3) ◽  
pp. 1276-1282
Author(s):  
Pakpoom Jarupoom ◽  
Pharatree Jaita ◽  
Supalak Manotham ◽  
Thanatep Phatungthane ◽  
Komsanti Chokethawai ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Barium Hexaferrite ◽  
Lead Free ◽  
Zirconium Titanate ◽  
Electrical And Magnetic Properties ◽  
Lead Free Ceramics ◽  
Barium Zirconium Titanate ◽  
Titanate Lead

Structural and Magnetic Properties of Nano Composite (Ni1-xSrx Fe12 O19) Prepared by Sol-gel

2021 ◽  
Vol 19 (10) ◽  
pp. 20-28
Author(s):  
Dhifaf Hussain Hassan ◽  
Sabah Jalal Fathi
Keyword(s):  
Magnetic Properties ◽  
Hysteresis Loop ◽  
Quaternary Structure ◽  
Sol Gel ◽  
Magnetic Hysteresis ◽  
Magnetic Hysteresis Loop ◽  
Cubic Phase ◽  
X Ray Diffraction ◽  
Two Phases ◽  
Hematite Fe2o3

The compound was prepared by sol-gel method for spontaneous combustion with certain weight ratios (x=0.0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9), the samples were calcined at a temperature (900oC) for a period of two hours(2h), then studied its structural and magnetic properties.one of the most prominent results that we obtained from the X-ray diffraction technique (XRD) is that compound has several phases. Where the sample (NiFe2O4) appeared to be polycrystalline and the dominant phase in it is the cubic phase, while the other phase is (Hematite)(Fe2O3) A crystal structure rhomboid (Rhombohedral), in addition to these two phases, the phase with the existing quaternary structure appeared (Sr2Fe2O5) its called (Orthorhombic). The results of the magnetic properties that were obtained through the (VSM) device, and one of the most important of these properties is the magnetic hysteresis loop by analyzing the magnetic hysteresis loop at (x=0.3), where the least area of the hysteresis loop or the least width of the hysteresis loop One of the most important parameters of the magnetic properties is the saturation magnetism (μS) and its value ranges from (19.76-3.86) (emu/gr), the highest value was at (X=0.3) and its value is (19.76emu/gr) and in general its value decreases with increasing concentration of strontium. The residual magnetism (Mr) ranges between (7.45-1.58) (emu/gr), where it reached its highest value at (x=0.3) and its value is (7.45emu/gr), and generally its value decreases with increasing concentration of strontium. In addition to that, there is another parameter which is coercion or Magnetic coercivity (Hc) ranges in value (1751.104-209.26) (Oe), reaching its lowest value at (x=0.3), and then increases with increasing strontium concentration until it reaches its highest value at (x=0.9), where it reached its value is (1751.104Oe). The square rate represented by the symbol (μi) has high values. This means that there is a mutual coupling between the soft and hard magnetic phases, which was the highest value at (x=0.3) and its value is (4.93).

Synthesis and Magnetic Properties of SrFe12-XCoxO19 (x= 0- 2) Hexaferrite Nanoparticles

2012 ◽  
Vol 622-623 ◽  
pp. 925-929 ◽  
Author(s):  
M. Zargar Shoushtari ◽  
S E. Mousavi Ghahfarokhi ◽  
F. Ranjbar
Keyword(s):  
Magnetic Properties ◽  
Magnetic Measurements ◽  
Sol Gel ◽  
Anisotropy Field ◽  
Strontium Hexaferrite ◽  
Nominal Composition ◽  
Second Phase ◽  
Energy Product ◽  
Crystalline Anisotropy ◽  
Magnetic Remanence

In this paper, a batch of M- type strontium hexaferrite samples with nominal composition of SrFe12-xCoxO19(where x= 0- 2), have been synthesized via sol- gel method. In the synthesis of samples, first a precursor gel was prepared, and then dry- gel was calcined at 1000°C for 2 hours to obtain the nano- SrFe12-xCoxO19. The XRD results revealed that for SrFe12-xCoxO19 samples with x≤0.5, all of them have single- phase hexaferrite structure and also this data suggests that the F 3+ ions are substituted by Co2+ ions in the crystallography sites of the SrFe12-xCoxO19, but for the samples with x>0.5, the second phase of CoFe2O4 is appeared and suggests that the Co2+ ions also make a distinct phase in the samples. The magnetic properties, such as saturation magnetization (Ms), magnetic remanence (Mr), magnetic coercivity (Hc), squareness ratio (Mr/Ms), crystalline anisotropy field (Ha), energy product [(BH)max] and the susceptibility χ as the derivative of M with respect to H of the upper branch of the hysteresis loop were discussed by measurements of M-H curves with vibrating sample magnetometer (VSM). The magnetic measurements revealed that the coercively (Hc) values of all the samples decrease with increasing dopant contents.

scholarly journals Structural and Magnetic Properties of Ni0.8Fe0.2/Ti Nanoscale Multilayers

Nanomaterials ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 780 ◽  
Author(s):  
Ricardo López Antón ◽  
Juan A. González ◽  
Juan P. Andrés ◽  
Andrei V. Svalov ◽  
Galina V. Kurlyandskaya
Keyword(s):  
Magnetic Properties ◽  
Temperature Dependence ◽  
Layered Structure ◽  
Magnetic Measurements ◽  
Hysteresis Loops ◽  
Multilayered Structures ◽  
X Ray ◽  
Structural And Magnetic Properties

The influence of the thickness of the Ni0.8Fe0.2 (Permalloy, Py) layers on the structural and magnetic properties of magnetron sputtered Py/Ti multilayers was studied. The thickness of the Py layers was varied in the interval of 8 to 30 Å. X-ray reflectivity scans evidence the existence of a well-defined layered structure in all the samples considered, but also the presence of a complex intermixed interface. The shape of both the temperature dependence of magnetization and the hysteresis loops of the multilayered structures depends strongly on Py thickness. Magnetic and reflectivity measurements were comparatively analyzed in order to better understand the structure of the samples, and specifically, their interfaces. In particular, the presence of small superparamagnetic Py at the interfaces of the samples, especially evident in the samples with the thinnest Py layers, seems confirmed by the magnetic measurements, agreeing well with the reflectivity results.

Effect of sol–gel synthesis method on the structural, electrical, and ferroelectric properties of lead-free K0.5Na0.5NbO3 ceramic

2019 ◽  
Vol 92 (1) ◽  
pp. 215-223 ◽  
Author(s):  
Shammi Kumar ◽  
Mamta Shandilya ◽  
Shweta Thakur ◽  
Nagesh Thakur ◽  
Gun Anit Kaur
Keyword(s):  
Ferroelectric Properties ◽  
Sol Gel ◽  
Synthesis Method ◽  
Lead Free ◽  
Sol Gel Synthesis
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