Correlation of magnetic field and stress-induced magnetic domain reorientation with Barkhausen Noise

ABSTRACTMagnetic Amplifying Magneto-Optical System (MAMMOS) shows human brain like memory behavior. Magnetic field and laser power have threshold to recover the stored memory like the human response of remembering. MAMMOS also has a feature to amplify very small recorded signals like our recovery of memory, e.g. fifty years ago episode.By adding the meaningful information on the magnetic field pattern, we can get some correlation between our memory and external stimulation. Such scheme is named as “the Active readout MAMMOS” which is analogues to the human process of remembering the memory.If the applied field pattern and timing phase just coincide with stored information, there occurs the coherent amplification of MAMMOS signal. We can utilize such phenomena as the trigger of “Memory Association”.

Download Full-text

Superconducting magnetoresistance effect observed in Co/Nb/Co trilayers under a parallel magnetic field: The importance of matching the width of magnetic domain walls of the Co layers with the thickness of the Nb interlayer

Journal of Applied Physics ◽

10.1063/1.4928329 ◽

2015 ◽

Vol 118 (6) ◽

pp. 063904 ◽

Cited By ~ 3

Author(s):

E. Aristomenopoulou ◽

D. Stamopoulos

Keyword(s):

Magnetic Field ◽

Domain Walls ◽

Magnetic Domain ◽

Magnetoresistance Effect ◽

Parallel Magnetic Field ◽

Magnetic Domain Walls ◽

Nb Interlayer

Download Full-text

The effect of stress and magnetic field orientation on surface Barkhausen noise in pipeline steel

NDT & E International ◽

10.1016/s0963-8695(97)81560-5 ◽

1996 ◽

Vol 29 (5) ◽

pp. 342

Keyword(s):

Magnetic Field ◽

Pipeline Steel ◽

Barkhausen Noise ◽

Field Orientation ◽

Magnetic Field Orientation

Download Full-text

Mathematical Study of Imposed Magnetic Field on Radiative Hydromagnetic Casson Fluid Flow in a Micro-Channel with Asymmetric Heating

Journal of Nanofluids ◽

10.1166/jon.2021.1810 ◽

2021 ◽

Vol 10 (4) ◽

pp. 478-490

Author(s):

M. Venkateswarlu ◽

P. Bhaskar

Keyword(s):

Magnetic Field ◽

Prandtl Number ◽

Thermal Radiation ◽

Current Density ◽

Liquid Velocity ◽

Magnetic Domain ◽

Casson Fluid ◽

Skin Friction Coefficient ◽

Micro Channel ◽

Suction Parameter

The work of steady hydromagnetic stream of Casson liquid in a micro-channel constructed by two indefinite vertical proportionate walls in the appearance of thermal radiation is presented in this article. The effect of an imposed magnetic domain appearing scheduled to movement of an electrically administrating liquid is adopted into account. The exact solutions of the liquid velocity, imposed magnetic domain, and temperature domain have been obtained. Also, the analytical expressions for the skin-friction coefficient and imposed current density are obtained. The basic aspiration of this article is to reinvestigate the supremacy of pertinent physical constraints like magnetic Prandtl number, injection/suction parameter, Hartmann number, thermal radiation parameter, rarefaction parameter, wall ambient temperature difference ratio, and liquid wall interaction parameter over the imposed magnetic field and velocity of the liquid. Lorentz force which is obtained from magnetic field has a propensity to decline the motion of liquid and imposed magnetic field. The imposed current density rises with an enhancement in the hydromagnetic Prandtl number. This study is applied in the machines like transformers, generators, and motors work on the principle of electromagnetic induction. Results are compared with the literature in the limiting case.

Download Full-text

Magnetic Domain Transition of Adjacent Narrow Thin Film Strips with Inclined Uniaxial Magnetic Anisotropy

Micromachines ◽

10.3390/mi11030279 ◽

2020 ◽

Vol 11 (3) ◽

pp. 279

Author(s):

Tomoo Nakai

Keyword(s):

Magnetic Field ◽

Easy Axis ◽

Magnetic Domain ◽

Magnetic Interaction ◽

Individual Element ◽

Typical Characteristic ◽

Many Body ◽

Uniaxial Magnetic Anisotropy ◽

Line Arrangement ◽

Normal Magnetic Field

This study deals a phenomenon of magnetic domain transition for the stepped magneto-impedance element. Our previous research shows that an element with 70° inclined easy axis has a typical characteristic of the domain transition, and the transition can be controlled by the normal magnetic field. In this paper, we apply this phenomenon and controlling method to the line arrangement adjacent to many body elements, in which mutual magnetic interaction exists. The result shows that the hidden inclined Landau–Lifshitz domain appears by applying a distributed normal field the same as an individual element.

Download Full-text

Characterisation of In-Depth Stress State by Magnetic Barkhausen Noise on Machined Steel Acquiring Different Frequency Bands

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.996.373 ◽

2014 ◽

Vol 996 ◽

pp. 373-379 ◽

Cited By ~ 3

Author(s):

Aitor Lasaosa ◽

Kizkitza Gurruchaga ◽

Virginia García Navas ◽

Ane Martínez-de-Guereñu

Keyword(s):

Magnetic Field ◽

Residual Stress ◽

Stress State ◽

Barkhausen Noise ◽

Magnetic Barkhausen Noise ◽

Frequency Bands ◽

Residual Stress State ◽

The Magnetic Field ◽

Xrd Method

The use of magnetic Barkhausen noise (MBN) signal to non-destructively characterize the in-depth residual stress state of machined steel was investigated. The effect of the frequency of the magnetic field applied and of analysing the resulting MBN signal in different frequency bands for an in-depth residual stress characterisation is discussed. The effect of the residual stress on each of the parameters derived from the MBN signal is analysed comparing with the result of the XRD method.

Download Full-text