The role of uncompensated spins in exchange biasing
The role of uncompensated spins in exchange biasing
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DOI：
10.1209/0295-5075/81/17001
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发表时间：
2006-05
期刊：
影响因子：
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通讯作者：
I. Schmid;P. Kappenberger;O. Hellwig;M. Carey;E. Fullerton;H. Hug
中科院分区：
文献类型：
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作者：
I. Schmid;P. Kappenberger;O. Hellwig;M. Carey;E. Fullerton;H. Hug
交换偏置（EB）效应的起源可以追溯到反铁磁体（AFM）中或其界面处的钉扎未补偿自旋（UCS）的存在。然而，对潜在机制的理解仍然被相互矛盾的报道所笼罩：例如，对于类似的FM/AFM系统，UCS相对于铁磁体（FM）的磁化方向的平行和反平行取向都被报道。在这里，不同的磁化历史，在磁力和磁力显微镜测量有利地用于证明钉扎UCS的共存，是平行和反平行的冷却场在金属（IrMn）和氧化物（CoO）EB系统。我们进一步得出结论，EB效应主要是由于钉扎界面UCS，这是反平行于FM自旋。
The origin of the exchange bias (EB) effect has been traced back to the existence of pinned uncompensated spins (UCS) in the antiferromagnet (AFM) or at its interface. However, the understanding of the underlying mechanism is still clouded by contradictory reports: For example, both a parallel as well as an antiparallel orientation of the UCS relative to the magnetization direction of the ferromagnet (FM) were reported for similar FM/AFM systems. Here different magnetization histories in magnetometry and magnetic force microscopy measurements are used advantageously to demonstrate the co-existence of pinned UCS that are parallel and antiparallel to the cooling field in metallic (IrMn) and oxidic (CoO) EB systems. We further conclude that the EB effect is mainly a result of pinned interfacial UCS, which are antiparallel to the FM spins.