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The coercive force spectrum of magnetite at high emperatures, evidence for thermal activation below the blocking tempemture.
Авторы: Dunlop D.J., Bina M.
1977 г.
Geophys.J.R.Astr.Soc.
Thermal activation of magnetization is the mechanism proposed by Neel to explain TRM (thermoremanent magnetization) and VRM (viscous remanent magnetization). Ned's theory is difficult to test because in a small constant field, magnetization changes occur only at or near particle blocking temperatures. By increasing the field, the blocking temperature can be lowered .to any desired temperature, including room temperature. Isothermal hysteresis or demagnetization data, paiticulaily coercive forces, therefore provide information about thermal fluctuations at temperatures well below the usual blocking temperatures of low-field TRM or VRM.
Файл: 865.pdf
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| Имя: | 01-12-2009, 19:09 |
Плохочитаемая копия с микропленок ВИНИТИ эпохальной в свое время статьи, с которой, собственно говоря, и началось детальное изучение деталей термоактивационного механизма, и, одновременно, сделалось модным получние коэрцитивных спектров.
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