采用射频溅射法制备了纳米“铁磁金属-半导体基体”Fex(ZnSe)1-x颗粒膜，并研究了其结构和磁特性。根据颗粒膜低场磁化率χ(T)温度关系和不同温度下的磁滞回线，证实了在一定的温度范围内，颗粒膜中的纳米铁颗粒表现出磁性弛豫效应：当截止温度TB=50K时，颗粒膜的磁性由超顺磁性转变为铁磁性。在截止温度以上，其饱和磁化强度MS(T)温度关系符合Bloch的自旋波T3/2定律，探讨分析了自旋波常数增大的原因。
Fex(ZnSe)1-x granular films were fabricated by the radio frequency sputtering, and the structures and magnetic properties of nanometer ferromagnetic metal-semiconductor matrix Fex(ZnSe)1-x granular films have been studied. According to the dependence of low field susceptibility on temperature and the hysteresis loops at different temperature, it was found that the nanometer-sized Fe particles in granular films showed the magnetic relaxation effect at definite temperature. The magnetic property of granular films changes from super-paramagnetic into ferromagnetic at the blocking temperature TB=50K. Above the blocking temperature, the MS(T) of the granular films follows the Bloch's the spin wave T3/2 law. The causes of increase of the spin wave constant are explored and analyzed.
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