### Abstract

We have used a finite-temperature version of the Preisach model, in which thermally activated switching events supplement those induced by an applied field h_{a}, to calculate the magnetizing and demagnetizing remanences, i_{r}(h_{a}) and i_{d}(-h_{a}), respectively, assuming a Preisach distribution that is Gaussian in both the coercive field h_{c} and the shift field h_{s}. Since T≠0, the time t that the magnetization is permitted to relax influences the shape of the hysteresis loop and the Henkel plots constructed from the remanences. If the effective time for relaxation is specific to a given branch of the cycle, due perhaps to the way the system reacts to a given experimental procedure, it is possible to generate Henkel plots with curvature suggestive of mean field interaction effects, even if no such effects are actually present, or with such extreme demagnetizing-like curvature that the plot actually crosses the nominal lower boundary i_{d}= -i_{r}. Experimental instances of this behavior are discussed.

Original language | English (US) |
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Pages (from-to) | 5758-5760 |

Number of pages | 3 |

Journal | Journal of Applied Physics |

Volume | 79 |

Issue number | 8 PART 2B |

DOIs | |

State | Published - Apr 15 1996 |

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## Cite this

*Journal of Applied Physics*,

*79*(8 PART 2B), 5758-5760. https://doi.org/10.1063/1.362178