| Fe/Pd金属超晶格的磁性和内转换电M?ssbauer谱研究 |
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| 引用本文： | 李民,梅良模.Fe/Pd金属超晶格的磁性和内转换电M?ssbauer谱研究[J].物理学报,1992,41(8):1361-1367. |
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| 作者姓名： | 李民 梅良模 |
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| 作者单位： | (1)山东大学物理系,济南250100; (2)山东大学物理系,济南250100;山东省电子工业局,济南250011 |
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| 基金项目： | 中国科学院物理研究所磁学国家重点实验室资助的课题 |
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| 摘 要： | 利用真空双源蒸镀法成功地制备了Fe/Pd金属超晶格,并对其结构和磁性进行研究。发现其比饱和磁化强度在固定Pd层30?不变时,随Fe层厚度减小而单调上升,这是界面处Fe对Pd的极化效应造成的,且得出0K下极化效应的等效Fe层厚度约为10?;低温下σ-T关系满足Bloch的T3/2定律,自旋波劲度系数随Fe层厚度减小而单调增大;居里温度则单调下降。57Fe内转换电子M?ssbauer谱(CEMS)的测量进一步证实极化效应的存在,而界面处Fe原子不存在磁性增强,也不存在“死层”效应。
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| 关 键 词： | Fe／Pd 超晶格 极化效应 CEMS |
| 收稿时间： | 8/8/1991 12:00:00 AM |
STUDIES OF THE MAGNETIC PROPERTIES AND 57Fe CONV-ERSION ELECTRON M?SSBAUER SPECTRUM OF THE MATELLIC Fe/Pd SUPERLATTICES |
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| LI MIN and MEI LIANG-MO.STUDIES OF THE MAGNETIC PROPERTIES AND 57Fe CONV-ERSION ELECTRON M?SSBAUER SPECTRUM OF THE MATELLIC Fe/Pd SUPERLATTICES[J].Acta Physica Sinica,1992,41(8):1361-1367. |
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| Authors: | LI MIN and MEI LIANG-MO |
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| Abstract: | The structural and magnetic properties of the two sources deposited Fe/Pd superlattices were studied. The samples were prepared by keeping the thickness of Pd layers dpd at 30? and varying dFe from 56 to 5.7?. The reduced saturation magnetization of Fe/Pd superlatti-ces, σt increased with the decrease of dFe this was due to the polarization effect of Pd. The effective thickness of polarization effect dpd was found as about 10? at 0K. The temperature dependence of magnetization followed Bloch T3/2 law in the range of 7-300K. and the spin-wave stiffness constant B increased with the decrease of dFe The Curie temperature, Tc decreased with dFe The 57Fe conversion electron M?ssbauer spectrum illustrated that the polarization effect existed among the layers, and there were no magnetic enhancing effect and "dead layer effect" on the Fe atoms at the interfaces.
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