Study on the influencing factors of magnetic memory method

The environmental magnetic field, the stress distribution and the materials are the influencing factors of Magnetic Memory Method (MMM). In order to discover the influencing rule of environmental magnetic field, different even magnetic field is offered during the period of Magnetic Memory (MM) signals occurred. It was found that the environmental magnetic field can change the MM signals magnitude, can not change the curve's profile ordinarily. If the certain magnetic field offered, the curve will be reversed. So, if the environmental magnetic field was changed suitably, the best MM signals will be obtained. Three kinds of materials had been used in experiments to investigate the difference and influencing rule. The result reveals that material is an important role which determines the value of MM signals on condition that the stress and environmental al magnetic field are the same. It was derived from the experimental data that the percent of C influences MM signals in a certain rule but not linear. Those results are different with the existing MMM and improve the MMM evaluation system. The environmental magnetic field function mechanism can be explained by the phenomena of these experiments.