Phys. Rev. B 67, 020412(R) (2003) [4 pages]Barkhausen noise and critical scaling in the demagnetization curve
The demagnetization curve, or initial magnetization curve, is studied by examining the embedded Barkhausen noise using the nonequilibrium, zero temperature random-field Ising model. The demagnetization curve is found to reflect the critical point seen as the system’s disorder is changed. Critical scaling is found for avalanche sizes and the size and number of spanning avalanches. The critical exponents are derived from those related to subloops. Finally, the behavior in the presence of long range demagnetizing fields is discussed. Results are presented for simulations of up to one million spins. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.67.020412
DOI:
10.1103/PhysRevB.67.020412
PACS:
75.60.Ej, 64.60.Ht, 75.60.Ch
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.