含铁磁颗粒的颗粒膜自旋激发弛豫研究

• 作 者: 吴强 郑瑞伦
• 机 构: 渝西学院物理学与电子信息工程系,西南师范大学物理学院 永川402168,北碚400715
• 出 处: 物理学报
• 发表日期: 2005年07期
• 关键词: 自旋激发弛豫 颗粒膜 铁磁颗粒

应用s d交换作用模型,在对自旋格林函数s d交换相互作用单环近似下,求出了含铁磁纳米颗粒的颗粒膜中自旋激发弛豫.并以(a C:H)1xCox颗粒膜为例,探讨了自旋激发弛豫随温度的变化规律.结果表明:经自旋极化激发实现的自旋激化弛豫过程与温度无关,而经热激活的自旋激发弛豫过程与温度有关.

Using the sd exchange model, the spin-excitation relaxation in the granular membrane containing ferromagnetic nanoparticles was obtained under the single-ring approximation to the sd exchange interaction of the spin-Green’s function. The (a C: H) 1xCox particles As an example, the variation of spin-induced relaxation with temperature is discussed.The results show that the spin-induced relaxation process by spin-polarized excitation has nothing to do with temperature, whereas the heat-induced spin-excitation relaxation process and temperature related.