Structural and Magnetic Properties of Low Temperature Fired Ferrite/Ceramic Composite Materials

2012 ◽  
Vol 466-467 ◽  
pp. 361-365
Author(s):  
Wei Wei Ling ◽  
Yuan Xun Li ◽  
Hai Nie ◽  
Huai Wu Zhang
Keyword(s):  
Low Temperature ◽  
Ceramic Composite ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
Measured Data ◽  
Complex Permeability ◽  
Sintering Behavior ◽  
Conventional Solid State Reaction ◽  
Numerical Fitting ◽  
Mgcuzn Ferrite

MgCuZn ferrite/CaTiO3and MgCuZn ferrite/BaTiO3composites which can be applied in low temperature co-fired ceramic (LTCC) technology were synthesized by conventional solid-state reaction at 950°C. The sintering behavior and microstructures of the samples have been analyzed. The complex permeability spectra of the above two composites have been investigated. The contribution of spin rotation and domain wall motion to the permeability spectra was estimated by the numerical fitting of measured data to the relevant formula. Influence of two types of magnetizing processes on the permeability of different composites has been analyzed combining with the variation of microstructures.

Low Temperature Fired Ferrite/Ceramic Composite Materials and their Permeability Spectra

2010 ◽  
Vol 150-151 ◽  
pp. 293-298 ◽  
Author(s):  
Wei Wei Ling ◽  
Huai Wu Zhang ◽  
Yuan Xun Li ◽  
Ying Li Liu
Keyword(s):  
Low Temperature ◽  
Ceramic Composite ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
Measured Data ◽  
Spin Rotation ◽  
Complex Permeability ◽  
Conventional Solid State Reaction ◽  
Numerical Fitting ◽  
Zn Ferrite

Ni-Cu-Zn ferrite/CaTiO3 and Ni-Cu-Zn ferrite/BaTiO3 composites which can be applied in low temperature co-fired ceramic (LTCC) technology were synthesized by conventional solid-state reaction lower than 950°C. The complex permeability spectra of the above two composites have been investigated. The contribution of spin rotation and domain wall motion to the permeability spectra was estimated by the numerical fitting of measured data to the relevant formula. Influence of two types of magnetizing processes on the permeability of different composites has been analyzed combining with the variation of microstructures.

scholarly journals Microstructure and Electromagnetic Properties of Ni-Zn-Co Ferrite up to 20 GHz

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Charalampos Stergiou
Keyword(s):  
Wall Motion ◽  
Wave Attenuation ◽  
Domain Wall Motion ◽  
Electromagnetic Properties ◽  
Complex Permeability ◽  
Microwave Dielectric ◽  
Zn Ferrite ◽  
Spin Resonance ◽  
Production Stages

The present paper examines the relation between different developed microstructures and the microwave electromagnetic properties in Ni-Zn-Co ferrite. To this end, the Ni0.25Zn0.25Co0.5Fe2O4composition has been prepared with the conventional ceramic process with varied prefiringTP(750°C, 1000°C) and sinteringTStop temperatures (1200°C, 1250°C). When lower temperatures are applied in these production stages, incomplete microstructures with low density, higher porosity, or finer grains are achieved. On account of these features, the contributions of domain wall motion and spin rotation to the complex permeabilityμ⁎(f)move to higher frequencies, whereas microwave dielectric permittivityε⁎(f)is decreased. In particular in conjunction with the high Co content, the wall relaxation and spin resonance are interestingly forced to occur at 850 MHz and 8.05 GHz, respectively. Regarding the electromagnetic wave attenuation, the ferrite annealed at lower temperatures exhibits strong return loss peaks at higher frequencies, but without other performance improvement. We should notice that the variations in sintering temperatureTSyield the maximum changes in the recorded parameters, including the coercive field,μ⁎(f),andε⁎(f), indicating the inferior role of prefiringTPin Ni-Zn ferrite.

Current-Induced Magnetic Domain Wall Motion in Co/Ni Nanowire at Low Temperature

2011 ◽  
Vol 4 (6) ◽  
pp. 063003 ◽  
Author(s):  
Kohei Ueda ◽  
Tomohiro Koyama ◽  
Daichi Chiba ◽  
Kazutoshi Shimamura ◽  
Hironobu Tanigawa ◽  
...  
Keyword(s):  
Low Temperature ◽  
Domain Wall ◽  
Wall Motion ◽  
Magnetic Domain ◽  
Domain Wall Motion ◽  
Magnetic Domain Wall

scholarly journals Mechanism of fast domain wall motion via current-assisted Bloch-point domain wall stabilization

2021 ◽  
Vol 103 (5) ◽  
Author(s):  
A. De Riz ◽  
J. Hurst ◽  
M. Schöbitz ◽  
C. Thirion ◽  
J. Bachmann ◽  
...  
Keyword(s):  
Domain Wall ◽  
Wall Motion ◽  
Domain Wall Motion

Current-induced domain wall motion: Comparison of STT and SHE

2021 ◽  
Vol 529 ◽  
pp. 167838
Author(s):  
J. Chureemart ◽  
S. Sampan-a-pai ◽  
S. Boonchui ◽  
R.W. Chantrell ◽  
P. Chureemart
Keyword(s):  
Domain Wall ◽  
Wall Motion ◽  
Domain Wall Motion

High-Density Magnetic Flash ADC Using Domain-Wall Motion and Pre-Charge Sense Amplifiers

2016 ◽  
Vol 52 (6) ◽  
pp. 1-10 ◽  
Author(s):  
Yogendra Kumar Upadhyaya ◽  
Mohit Kumar Gupta ◽  
Mohammad Hasan ◽  
Sudhanshu Maheshwari
Keyword(s):  
Domain Wall ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
High Density ◽  
Flash Adc ◽  
Sense Amplifiers
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