Discrepancy of the magnetic behaviors and crystalline structure on the Co/FeMn and FeMn/Co interfaces with ultrathin Pt spacer

Discrepancy of the magnetic behaviors and crystalline structure on the Co/FeMn and FeMn/Co interfaces with ultrathin Pt spacer
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具有超薄 Pt 垫片的 Co/FeMn 和 FeMn/Co 界面上的磁性行为和晶体结构的差异

DOI:
10.1007/s12598-010-0152-x
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发表时间:
2010-09
期刊:
影响因子:
8.8
通讯作者:
Feng Chun
Feng Chun
中科院分区:
材料科学1区
文献类型:
--
作者:
Liu Yang;Fu Yanqiang;Jin Chuan;Feng Chun

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铁磁/反铁磁(FM/AFM)界面的交换耦合受磁结构和晶体微结构的共同影响。用磁控溅射法制备了Co/FeMn/Co薄膜,在Co/FeMn和FeMn/Co界面分别插入0.4nm的Pt间隔层。两个界面上和下的FeMn层表现出不同的行为之前和之后的Pt间隔插入。在FeMn底界面单层内,界面未补偿自旋显著收缩,而在顶界面处,FeMn界面自旋沿着离面方向的钉扎强度发生弛豫. XRD分析表明,FeMn层上的Pt层形成了面心立方(002)织构,表明FeMn上下界面的磁性差异是由晶体结构引起的。
The exchange coupling at the ferromagnetic/antiferromagnetic (FM/AFM) interface is influenced by both the magnetic structure and the crystalline micro-structure. Co/FeMn/Co thin films with 0.4 nm Pt spacer layer inserted into the Co/FeMn and FeMn/Co interface respectively were deposited by means of magnetron sputtering. The two interfaces upon and beneath the FeMn layer show distinct behaviors before and after the Pt spacer inserted. There is a remarkable shrink of the interfacial uncompensated spins within the FeMn bottom interfacial monolayers, whereas a relaxation of the pinning strength of the FeMn interfacial spins along the out-of-plane direction occurs at the top interface. XRD analysis indicates the Pt layer upon the FeMn layer forms an fcc (002) texture, implying the magnetic discrepancy between the top and bottom FeMn interfaces has crystalline structural origins.
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