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2011 | 120 | 3 | 491-496
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Jiles-Atherton Magnetic Hysteresis Parameters Identification

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This paper presents a method of fitting the magnetic hysteresis curves using a calculating algorithm within a computer programme. The calculating programme uses the equations of the Jiles-Atherton model to simulate the M(H) magnetization curve. The aim of this program is to find the values of the parameters which are part of the Jiles-Atherton model once the regression curve for a major magnetization curve obtained experimentally is found. The values of these parameters can be increased or decreased gradually. The parameters modification takes place in such a way that the root mean square deviation between the points of the two graphs, also experimentally simulated, should decrease gradually and, in the end, it should be found below the preestablished percentage value in comparison to the previous value. The procedure for minimizing the root mean square deviation has as a result the fact that the simulated curve represents the regression curve. The calculating programme considers a second method of calculating the values of the parameters by using the already found regression curve. This paper also presents the values of the Jiles-Atherton model parameters obtained by fitting the magnetization curves of several cobalt ferrites samples, sintered at different temperatures.
  • "Al. I. Cuza" University, Faculty of Physics & Carpath Center, 700506 Iasi, Romania
  • "Al. I. Cuza" University, Faculty of Physics & Carpath Center, 700506 Iasi, Romania
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