Enhanced dc Magnetic Field Sensitivity for Coupled ac Magnetic Field and Stress Driven Soft Magnetic Laminate Heterostructure

2020 ◽  
Vol 20 (24) ◽  
pp. 14756-14763
Author(s):  
Yao Wang ◽  
Ning Xiao ◽  
Rui Xiao ◽  
Yumei Wen ◽  
Ping Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Soft Magnetic ◽  
Ac Magnetic Field ◽  
Dc Magnetic Field ◽  
Field Sensitivity

Effect of Magnetic Fields on the Resistance and Microstructure of Al-Cu Alloy during Solidification Processing

2011 ◽  
Vol 287-290 ◽  
pp. 2916-2920
Author(s):  
Chun Yan Ban ◽  
Peng Qian ◽  
Xu Zhang ◽  
Qi Xian Ba ◽  
Jian Zhong Cui
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Turning Points ◽  
Probe Method ◽  
Solidification Processing ◽  
Ac Magnetic Field ◽  
Dc Magnetic Field ◽  
Cu Alloy ◽  
The Difference ◽  
Good Agreement

The resistance of Al-21%Cu alloy under no magnetic field, DC magnetic field and AC magnetic field from liquid to solid was measured by a four-probe method. The difference of resistance versus temperature curves (R-T curves) was analyzed. It is found that the R-T curves of Al-21%Cu alloy are monotone decreasing and have two obvious turning points. Under DC magnetic field, the liquidus and solidus temperatures of the alloy both decrease, while under AC magnetic field, the liquidus and solidus temperatures both increase. There is a good agreement between the microstructure of quenching sample and R-T curves. The mechanism of the effect of magnetic fields was discussed.

Study on the Solidification Structures of Al-Fe-Si Alloy under DC and AC Magnetic Fields

2011 ◽  
Vol 189-193 ◽  
pp. 4477-4482
Author(s):  
Chun Yan Ban ◽  
Xu Zhang ◽  
Peng Qian ◽  
Yi Han ◽  
Jian Zhong Cui
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Chinese Script ◽  
Minor Amount ◽  
Fine Needle ◽  
Ac Magnetic Field ◽  
Dc Magnetic Field ◽  
Conventional Condition ◽  
The Difference ◽  
Al Matrix

The effects of DC and AC magnetic field on the phase composition, morphology and distribution of the ternary Al-Fe-Si alloy were investigated. The solidification structures of the alloy solidified with and without the application of magnetic fields were confirmed by DSC and structural measurements. The results showed that, in this Al-Fe-Si alloy the fine needle-like Al3Fe phase dominated the microstructure at the grain boundaries with the minor amount of Chinese script-like α-AlFeSi. Distribution of Al3Fe phase was almost homogeneous in the volume of the sample when alloy was solidified in the conventional condition. When the DC magnetic field was imposed, distribution of Al3Fe phase was more homogeneous. However, the Al3Fe and α-AlFeSi phases were accumulated towards the center of the sample with the application of the AC magnetic field. This is due to the difference of Lorentz force between Al matrix and iron-containing intermetallics. Furthermore, the amount of Chinese script-like α-AlFeSi was increased remarkably under AC magnetic field.

Effects of longitudinal AC magnetic field on frequency spectrum of voltage response of soft magnetic conductors

2003 ◽  
Vol 258-259 ◽  
pp. 198-200 ◽  
Author(s):  
A.S. Antonov ◽  
N.A. Buznikov ◽  
M.M. Filatov ◽  
V.P. Goncharov ◽  
A.A. Rakhmanov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Frequency Spectrum ◽  
Voltage Response ◽  
Soft Magnetic ◽  
Ac Magnetic Field

Magnetic Properties and Temperature Stability of Nanocrystalline Fe-Based Soft Magnetic Alloys

2010 ◽  
Vol 168-169 ◽  
pp. 384-387
Author(s):  
N.I. Noskova ◽  
V.V. Shulika ◽  
A.P. Potapov
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Temperature Stability ◽  
Magnetic Characteristics ◽  
Time Stability ◽  
Soft Magnetic ◽  
Magnetic Alloys ◽  
Ac Magnetic Field ◽  
Soft Magnetic Alloys ◽  
Temperature Time

The effect of the nanocrystallization conditions on the structure, magnetic characteristics and temperature stability of the Fe73.5Cu1Nb3Si13.5B9, Fe73.5Cu1Nb1.5Мo1.5Si13.5B9, Fe69Cu1Nb1.5Мo1.5Si13.5B9Co4.5, and (Fe0.6Co0.4)86Hf7B6Cu1 nanocrystalline soft magnetic alloys has been analyzed. The samples were nanocrystallized in the absence of a field, in a dc or ac magnetic field. It has been shown that the Fe73.5Cu1Nb1.5Мo1.5Si13.5B9 alloy has unique magnetic properties and a high temperature-time stability. It has been found that nanocrystallization of the (Fe0.6Co0.4)86Hf7B6Cu1 amorphous alloy in an ac magnetic field considerably improves its static and dynamic magnetic properties.

Influence of Magneto-Thermal Treatments on Longitudinally Driven Giant Magneto-Impedance Effect in Co-Fe-Si-B Amorphous Ribbons

2014 ◽  
Vol 926-930 ◽  
pp. 137-140
Author(s):  
Jie Li ◽  
Xin Hua Lin ◽  
Xiao Hua Wang ◽  
Min Tang
Keyword(s):  
Magnetic Field ◽  
Melt Spinning ◽  
Longitudinal Magnetic Field ◽  
Amorphous Ribbon ◽  
Zero Magnetic Field ◽  
Thermal Treatments ◽  
Soft Magnetic ◽  
Field Sensitivity ◽  
Giant Magneto Impedance ◽  
Melt Spinning Technique

Co64Fe4Si14.5B14.5amorphous ribbon was fabricated by the melt-spinning technique. Soft magnetic properties of the ribbon were improved by annealing at 623K for 1 hour with a zero magnetic field, a 50mT longitudinal or transverse external magnetic field comparing with the as-quenched ribbon. The longitudinally driven giant magneto-impedance (LDGMI) effect and its field sensitivity (ξ) have been investigated in the frequency (f) range of 1kHz~1MHz. It is found that at f=51kHz, the LDGMI effect and ξ reach the largest values for the sample annealed with a longitudinal magnetic field.

Effect of DC and AC Magnetic Fields on the Solidification Structure of Commercially Pure Aluminium

2012 ◽  
Vol 583 ◽  
pp. 387-390 ◽  
Author(s):  
Chun Yan Ban ◽  
Dan Dan Jiang ◽  
Lian Liu ◽  
Jian Zhong Cui
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Cooling Rate ◽  
Solidification Structure ◽  
Pure Aluminium ◽  
Ac Magnetic Field ◽  
Dc Magnetic Field ◽  
Commercially Pure

The effect of DC and AC magnetic fields on the macrostructure, morphology and distribution of the iron-containing intermetallics in the commercially pure Al was investigated. It is found that, at a cooling rate of 3°C/min, the grain is very coarse when the alloy solidifies both with and without magnetic fields. Comparing with the sample solidifies without magnetic field, the solidification structure has almost no change when it solidifies under DC magnetic field, while AC magnetic field changes the solidification structure obviously and makes grains show radial columnar crystals. The intermetallics is dominated by long needle-like phase when the sample solidifies under the condition of no magnetic field. Under AC magnetic field, the intermetallics is refined and accumulated towards the center of sample, and the amount of bone-like α-AlFeSi phase is increased remarkably. The mechanism of the effect of magnetic fields was discussed.

scholarly journals Enhanced dc magnetic field sensitivity by improved flux concentration in magnetoelectric laminates

2011 ◽  
Vol 99 (15) ◽  
pp. 153502 ◽  
Author(s):  
Junqi Gao ◽  
David Gray ◽  
Ying Shen ◽  
Jiefang Li ◽  
D. Viehland
Keyword(s):  
Magnetic Field ◽  
Dc Magnetic Field ◽  
Field Sensitivity ◽  
Flux Concentration
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