Spintronics with compensated ferrimagnets
Spintronics with compensated ferrimagnets
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DOI：
10.1063/1.5144076
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发表时间：
2020-03
影响因子：
4
通讯作者：
Joseph Finley;Luqiao Liu
中科院分区：
文献类型：
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作者：
Joseph Finley;Luqiao Liu
通过控制和传感纳米级铁磁体的磁矩取向，实现了磁信息存储。最近，人们集中精力利用具有反铁磁耦合的材料作为存储介质来实现开关更快、对外部磁场更安全、并且具有更高存储密度的器件。在这类材料中有亚铁磁体，通过调节化学成分、温度和应变等参数，可以将其磁化强度降低到零。与传统的反铁磁体相比，补偿型亚铁磁体不仅具有上述的速度和密度优势，而且由于存在不等价的磁亚晶格，还允许使用方便的电读写机制。最近的研究已经证明了快速的自转-扭矩切换，以及补偿的亚铁磁体的高效电子读数。使用这些零力矩磁体的进一步材料和器件研究有望为快速和节能的信息存储技术提供一个自旋电子平台。
Magnetic information storage has been achieved by controlling and sensing the magnetic moment orientation of nanoscale ferromagnets. Recently, there has been concentrated effort to utilize materials with antiferromagnetic coupling as a storage medium to realize devices that switch faster, are more secure against external magnetic fields, and have higher storage density. Within this class of materials are ferrimagnets, whose magnetization can be reduced to zero by tuning parameters such as the chemical composition, temperature, and strain. Compared to conventional antiferromagnets, compensated ferrimagnets not only possess the aforementioned speed and density advantages but also allow the use of convenient electrical reading and writing mechanisms due to the existence of inequivalent magnetic sublattices. Recent research has demonstrated fast spin-torque switching, as well as efficient electrical reading with compensated ferrimagnets. Further material and device research using these zero-moment magnets promises a spintronic platform for fast and energy efficient information storage technology.