barkhausen effect การใช้

• This was Barkhausen noise due to the Barkhausen effect in the iron.
• The Barkhausen effect offered direct evidence for the existence of ferromagnetic domains, which previously had been postulated theoretically.
• The "'Barkhausen effect "'is a name given to the noise in the magnetic output of a ferromagnet when the magnetizing force applied to it is changed.
• The Wiegand effect is a macroscopic extension of the Barkhausen effect, as the special treatment of the Wiegand wire causes the wire to act macroscopically as a single large magnetic domain.
• This is shown by the Barkhausen effect : as the magnetizing field is changed, the magnetization changes in thousands of tiny discontinuous jumps as the domain walls suddenly " snap " past defects.