scholarly journals Effect of Torsion Stress on the Offset and Sensitivity of Diagonal and Off-Diagonal GMI in Amorphous Wires

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4121 ◽  
Author(s):  
Julie Nabias ◽  
Aktham Asfour ◽  
Jean-Paul Yonnet
Keyword(s):  
Rotation Angle ◽  
Impedance Tensor ◽  
Zero Field ◽  
Stress Effect ◽  
Torsional Stress ◽  
Current Clamp ◽  
Diagonal Component ◽  
Amorphous Wires ◽  
Giant Magneto Impedance ◽  
A Current

In this paper, the torsional stress effect on Giant Magneto-Impedance (GMI) was studied in Co-rich amorphous wires. The study, which was conducted in the context of the development of a current clamp based on GMI, considered torsion as a parameter of the influence of this sensor. Both diagonal, Z11, and off-diagonal, Z21, components of the impedance tensor were investigated. The samples were Co-rich wires with a 100 µ diameter. The wires were twisted positive and negative angles with respect to a reference position. For each component of the impedance, the intrinsic sensitivity and offset were measured as a function of the rotation angle. The results showed that the sensitivity of the diagonal component at a given working point slightly increased for angles between −90° to +90°, whereas the sensitivity was almost constant for the off-diagonal component at zero-field. The intrinsic offset in the diagonal configuration was almost unchanged for the rotation angles considered, whereas this offset increased in the off-diagonal configuration. Furthermore, the GMI ratio of Z11 was also measured as a function of the rotation angle for comparison purposes with known data. The maximum of this ratio was obtained for a rotation angle of about 50°.

scholarly journals Surface microstructural design to improve mechanical and giant magneto-impedance properties of melt-extracted CoFe-based amorphous wires

2021 ◽  
pp. 109642
Author(s):  
Sida Jiang ◽  
Huan Wang ◽  
Diana Estevez ◽  
Yongjiang Huang ◽  
Lunyong Zhang ◽  
...  
Keyword(s):  
Amorphous Wires ◽  
Microstructural Design ◽  
Giant Magneto Impedance

Preparation and giant magneto-impedance behavior of Co-based amorphous wires

2013 ◽  
Vol 42 ◽  
pp. 62-67 ◽  
Author(s):  
Yangyong Zhao ◽  
Haiying Hao ◽  
Yong Zhang
Keyword(s):  
Amorphous Wires ◽  
Giant Magneto Impedance

Morphological and functional aspects of two different types of hair cells in the goldfish sacculus

1989 ◽  
Vol 62 (6) ◽  
pp. 1330-1343 ◽  
Author(s):  
I. Sugihara ◽  
T. Furukawa
Keyword(s):  
Cell Body ◽  
Hair Cells ◽  
The Other ◽  
Resting Potential ◽  
K Channel ◽  
Short Hair ◽  
Current Clamp ◽  
Other Hand ◽  
Inwardly Rectifying ◽  
A Current

1. With the use of whole-cell mode of the patch-clamp method, we examined the electrical responses of hair cells enzymatically isolated from the goldfish sacculus. 2. Hair cells from the rostral saccule had a short cell body and were ovoidal or eggplantlike in shape, whereas hair cells from the caudal saccule had a variable shape. Many had a longer cell body and were cylindrical or gourd-like in shape, but some short hair cells were also present in the caudal saccule. 3. The short hair cells had a resting potential of about -75 mV. In current-clamp experiments, these hair cells elicited damped oscillatory-potential changes of a relatively small amplitude in response to a depolarizing current. A current in the opposite direction produced a slow hyperpolarization, much larger in amplitude. 4. Resonant frequency of the short, or the oscillatory, type of hair cells ranged from 40 to 200 Hz or higher. However, resonance was generally of a poor quality as compared with that noted for hair cells in the turtle cochlea or frog sacculus. 5. The long hair cells had a resting potential of -90 to -100 mV. In current-clamp experiments, these hair cells elicited an all-or-none spike approximately 50 mV in amplitude in response to a depolarizing current. The spike was usually followed by a plateau, which was maintained for the duration of the depolarizing pulse. In some hair cells, damped slow oscillatory waves were evoked at a rate of 5-15 Hz. On the other hand, a hyperpolarizing current produced potential changes much smaller in amplitude. 6. Voltage-clamp experiments showed that Ca2+-activated K+ channel and A-current, especially its high-threshold subclass, were involved in the generation of outward rectification in the oscillatory-type hair cells. On the other hand, Na+, in addition to Ca2+, was involved in the generation of spike in the spike-type hair cells. Spike potentials were elicited even in the presence of tetrodotoxin (TTX), but the rate of rise was slower as compared with the intact spikes. 7. The spike-type hair cells had an inwardly rectifying K+ channel similar to that noted in the tunicate egg and chick vestibular hair cell. However, the oscillatory-type hair cells had an inwardly rectifying channel similar to the hyperpolarization-activated current, Ih, of the rod inner segment, or sinoatrial nodal cell, or lacked the inwardly rectifying channel. Differences in the resting membrane potential between the oscillatory- and spike-type hair cells are probably related to differences in the inwardly rectifying channels. 8. Effects of sound stimulation were simulated by injecting a half-wave rectified sinusoidal current of various frequencies.(ABSTRACT TRUNCATED AT 400 WORDS)

Giant magneto-impedance in Co-rich amorphous wires and films

1995 ◽  
Vol 31 (2) ◽  
pp. 1249-1260 ◽  
Author(s):  
L.V. Panina ◽  
K. Mohri ◽  
T. Uchiyama ◽  
M. Noda ◽  
K. Bushida
Keyword(s):  
Amorphous Wires ◽  
Giant Magneto Impedance
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