| 纳米Fe-ZnSe颗粒膜的结构与磁性 |
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| 引用本文： | 张林,张连生.纳米Fe-ZnSe颗粒膜的结构与磁性[J].金属学报,2008,44(3):277-280. |
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| 作者姓名： | 张林 张连生 |
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| 作者单位： | 山东大学物理与微电子学院,济南,250100 |
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| 摘 要： | 采用射频溅射法制备了纳米铁磁金属-半导体基体Fe0.35(ZnSe)0.65颗粒膜,并研究了其结构和磁特性.根据颗粒膜低场磁化率x(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=50 K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.
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| 关 键 词： | Fe-ZnSe 纳米金属颗粒膜 结构 超顺磁性 自旋波 |
| 文章编号： | 0412-1961(2008)03-0277-04 |
| 收稿时间： | 2007-08-02 |
| 修稿时间： | 2007年8月2日 |
Structure and magnetic property of nanometric Fe-ZnSe granular films |
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| ZHANG Lin,ZHANG Liansheng.Structure and magnetic property of nanometric Fe-ZnSe granular films[J].Acta Metallurgica Sinica,2008,44(3):277-280. |
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| Authors: | ZHANG Lin ZHANG Liansheng |
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| Abstract: | 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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| Keywords: | nanometer metal granular film structure super-paramagnetic property spin wave |
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