Structural, magnetotransport, and micromagnetic properties of sputtered Ir(111)/Co superlattices
Structural, magnetotransport, and micromagnetic properties of sputtered Ir(111)/Co superlattices
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溅射 Ir(111)/Co 超晶格的结构、磁输运和微磁特性
DOI：
10.1063/1.372206
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
K. Samwer
中科院分区：
文献类型：
--
作者：
Yuansu Luo;B. Pfeifer;A. Kaeufler;M. Moske;K. Samwer
本文进一步研究了溅射Ir（111）/Co超晶格的结构和磁输运性质。磁化环和磁阻曲线显示出相关性，可以写成ΔR/R −（M/Ms）2，表明外部磁场中的电阻变化是由于传导电子的自旋相关散射，尽管观察到的最大ΔR/R值仅为4%（10 K）。低的影响可以归因于Ir和Co子带之间的带匹配。退火温度高于350 °C时，组分发生相互扩散，导致超晶格退化，磁矩和磁电阻均下降，从而观察到退火对结构和磁性的影响。 克尔显微镜和磁力显微镜的图像显示微磁结构，这可以很好地理解在比较的磁化强度和磁阻测量。
This article presents a further study on the structural and magnetotransport properties in sputtered Ir(111)/Co superlattices. The magnetization loops and magnetoresistance curves show a correlation, which can be written as ΔR/R∝−(M/Ms)2 and indicates that the resistive change in external magnetic field is due to spin dependent scattering of conduction electrons, although the largest ΔR/R value observed is only 4% (10 K). The low effect can be attributed to band matching between Ir and Co subbands. Annealing effects on structural and magnetic properties were observed by the results that interdiffusion of the components takes place at an annealing temperature above 350 °C and leads to degradation of the superlattice, followed by a decrease both in magnetic moment and in magnetoresistance. The images of Kerr microscopy and magnetic force microscopy show micromagnetic structures, which can be well understood in comparison with the magnetization and magnetoresistance measurements.