Understanding the power spectrum of the magnetization noise is a long standing problem. While the earlier work considered superposition of 'elementary' jumps, without reference to the underlying physics. recent approaches relate the properties of the noise with the critical dynamics of domain walls. In particular, a new derivation of the power spectrum exponent has been proposed for the random-field Ising model. We apply this approach to the experimental ;ata, showing its validity and limitations.
On the power spectrum of magnetization noise / G. Durin, S. Zapperi. - In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - ISSN 0304-8853. - 242-245:Part 2(2002 Apr), pp. 1085-1088. ((Intervento presentato al convegno Joint European Magnetic Symposia (JEMS 01) tenutosi a Grenoble nel 2001.
On the power spectrum of magnetization noise
S. Zapperi
2002
Abstract
Understanding the power spectrum of the magnetization noise is a long standing problem. While the earlier work considered superposition of 'elementary' jumps, without reference to the underlying physics. recent approaches relate the properties of the noise with the critical dynamics of domain walls. In particular, a new derivation of the power spectrum exponent has been proposed for the random-field Ising model. We apply this approach to the experimental ;ata, showing its validity and limitations.
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