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课题来源:在日常生活中,原本磁力很强的磁铁由于在强磁场的环境下磁力的方向以及大小会发生变化,例如小磁铁在两块大磁铁的干扰下磁力会有所减弱;磁铁放在炉子旁,在高温环境下,磁力也会有所减弱;铁钉被吸附在磁铁上,经过一段时间后会有磁性。这些都是为什么呢?我们查阅了许多资料,知道每一块磁铁都有不同的居里温度(CurieTemperature),即磁铁在该温度下会失去磁性,而我们常见到的磁铁的居里温度是多少呢?磁力的变化有什么用处?
Source: In daily life, the magnet with strong magnetic force will change in the direction and size of the magnetic force under the strong magnetic field environment. For example, a small magnet will weaken the magnetic force under the interference of two big magnets; Beside the furnace, the magnetic force will be weakened under the high temperature environment; the nails will be adsorbed on the magnet and will become magnetic after a period of time. Why are all these? We have consulted a lot of data, knowing that each magnet has a different Curie temperature, that is, the magnet loses its magnetism at this temperature, and what is the Curie temperature of the magnet we commonly see? What is the use of magnetic changes?