scholarly journals Theory of giant magneto-impedance effect in amorphous ribbon with transverse bias magnetic field

2011 ◽  
Vol 60 (3) ◽  
pp. 037503
Author(s):  
Bao Bing-Hao ◽  
Ren Nai-Fei ◽  
Luo Ying
Keyword(s):  
Magnetic Field ◽  
Amorphous Ribbon ◽  
Bias Magnetic Field ◽  
Giant Magneto Impedance

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.

Investigation of magnetic field anneal in micro-patterned amorphous ribbon on giant magneto-impedance effect enhancement

Sensor Review ◽  
2019 ◽  
Vol 39 (3) ◽  
pp. 309-317 ◽  
Author(s):  
Zhu Feng ◽  
Shaotao Zhi ◽  
Lei Guo ◽  
Chong Lei ◽  
Yong Zhou
Keyword(s):  
Magnetic Field ◽  
Line Width ◽  
Longitudinal Magnetic Field ◽  
Amorphous Ribbon ◽  
Domain Wall Motion ◽  
Longitudinal Field ◽  
Content Type ◽  
Demagnetizing Field ◽  
Gmi Effect ◽  
Giant Magneto Impedance

Purpose This paper aims to investigate magnetic field anneal in micro-patterned Co-based amorphous ribbon on giant magneto-impedance (GMI) effect enhancement. Design/methodology/approach The amorphous ribbons were annealed in transverse and longitudinal magnetic field. The influence of different field annealing directions on GMI effect and impedance Z, resistance R and reactance X with a series of line width have been deeply analyzed. Findings In comparison with GMI sensors microfabricated by unannealed and transversal field annealed ribbons, GMI sensor which was designed and microfabricated by longitudinal field anneal ribbon performs better. The results can be explained by the domain wall motion and domain rotation during annealing process and the geometric structure of Co-based GMI sensor. In addition, shrinking the line width of GMI sensor can promote GMI effect significantly because of the effect of demagnetizing field, and the optimum GMI ratio is 209.7 per cent in longitudinal field annealed GMI sensor with 200 μm line width. Originality/value In conclusion, annealing in longitudinal magnetic field and decreasing line width can enhance GMI effect in micro-patterned Co-based amorphous ribbon.

Study on Magnetoelectric Effect in Amorphous Ribbon /PZT Laminate Materials

2011 ◽  
Vol 464 ◽  
pp. 448-452
Author(s):  
Bing Hao Bao ◽  
Xing Cheng Tian
Keyword(s):  
Magnetic Field ◽  
Theoretical Analysis ◽  
Sandwich Structure ◽  
Magnetoelectric Effect ◽  
Amorphous Ribbon ◽  
Low Frequency ◽  
Bias Magnetic Field ◽  
Amorphous Ribbons ◽  
Voltage Coefficient ◽  
Laminate Materials

Magnetoelectric(ME) effect in magnetoelectric laminate materials have potential application in many fields. In this paper, Fe78Si9B13 amorphous ribbons /PZT/amorphous ribbons sandwich structure laminate materials were fabricated. By theoretical analysis and experimental verification, we studied systemically on the characteristics of the magnetoelecric laminate materials, such as optimized bias magnetic field of the ME effect, ME voltage coefficient at low frequency and the resonant frequency of the magnetoelecric laminate element. ME effect can be used to develop new ac magnetic sensor and other devices.

scholarly journals ANISOTROPIC DEPENDENCE OF GIANT MAGNETO-IMPEDANCE OF AN AMORPHOUS FERROMAGNETIC RIBBON ON BIASING FIELD

2007 ◽  
Vol 21 (22) ◽  
pp. 3859-3867
Author(s):  
B. KAVIRAJ ◽  
S. K. GHATAK
Keyword(s):  
Magnetic Field ◽  
Room Temperature ◽  
Amorphous Ribbon ◽  
Large Change ◽  
Nominal Composition ◽  
Large Drop ◽  
Giant Magneto Impedance ◽  
Dc Biasing ◽  
Ac Fields ◽  
The Magnetic Field

The magneto-impedance (MI) in an amorphous ribbon of nominal composition Fe 73.5 Nb 3 Cu 1 Si 13.5 B 9 has been measured at 1 MHz at room temperature for different configurations of exciting AC and biasing DC fields. A large drop in both resistance and reactance is observed as a function of the magnetic field. When the DC and AC fields are parallel but normal to the axis of the ribbon, a smaller magnetic field is needed to reduce the impedance to its small saturated value compared to the situation when the fields are along the axis of the ribbon. A larger DC field is required to lower the impedance when the DC field acts perpendicularly to the plane of the ribbon. Such anisotropy in magneto-impedance is related to the anisotropic response of the magnetization of the ribbon. The large change of impedance is attributed to a large variation of AC permeability on the direction and magnitude of the DC biasing field.

Analysis of the giant magnetostrictive actuator with strong bias magnetic field

2015 ◽  
Vol 394 ◽  
pp. 416-421 ◽  
Author(s):  
Guangming Xue ◽  
Zhongbo He ◽  
Dongwei Li ◽  
Zhaoshu Yang ◽  
Zhenglong Zhao
Keyword(s):  
Magnetic Field ◽  
Bias Magnetic Field ◽  
Magnetostrictive Actuator

Non-linear dynamics of the Villari effect in the presence of a non-homogeneous magnetic field

2018 ◽  
Vol 233 (4) ◽  
pp. 431-440
Author(s):  
Andrzej Rysak ◽  
Magdalena Gregorczyk
Keyword(s):  
Magnetic Field ◽  
Time Series ◽  
Hysteresis Loops ◽  
Bias Field ◽  
Homogeneous Magnetic Field ◽  
Operating Conditions ◽  
Bias Magnetic Field ◽  
Linear Dynamics ◽  
Non Linear ◽  
Magnetostrictive Devices

Investigations of systems with an active magnetostrictive element generally assume the presence of an external homogeneous bias magnetic field. This article, however, presents the results of a study investigating a bimorph magnetostrictive-aluminium beam vibrating in a non-homogeneous bias field. By comparing results obtained under different operating conditions of the system, the combined effect of the non-linear beam stress and the non-homogeneous external magnetic field on the dynamics of the Villari phenomenon is determined. The preliminary results prove that the application of non-linear magnetic fields to the magnetostrictive devices ensures the extension of energy harvesting bandwidth of these devices and can be used to improve their control possibilities. A study of time series and hysteresis loops provides more detailed information about the non-linear magnetization and dynamics of the system.

Sign in / Sign up

Export Citation Format

Share Document