arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2302.07620cond-mat.mtrl-scicond-mat.mes-hallphysics.app-ph
收藏

应变控制磁致伸缩赝自旋阀

A strain-controlled magnetostrictive pseudo spin valve

Vadym Iurchuk, Julien Bran, Manuel Acosta, Bohdan Kundys

摘要:

通过逆磁致伸缩效应实现磁场控制是提高基于巨磁电阻效应的高能效存储和传感器件性能的有效途径。本文报道了在铁电PMN-PT衬底上生长的Co $/$ Cu $/$ Py赝自旋阀的横向电场驱动的应变介导磁性能调制。结果表明,随着电场的增加,赝自旋阀的巨磁电阻率逐渐减小,这是由于应变诱导磁弹性各向异性的贡献导致Co层的磁化强度偏离了初始方向.此外,我们表明,应变诱导的磁各向异性有效地转移磁致伸缩Co层的开关场,同时保持开关场的近零磁致伸缩Py层不受影响,由于其可忽略的磁致伸缩常数。我们认为,磁致伸缩优化的磁性薄膜在适当的工程多层结构可以提供一条路径,以提高自旋电子器件中的选择性磁开关。

英文摘要:

Electric-field control of magnetism via inverse magnetostrictive effect is an efficient path towards improving energy-efficient storage and sensing devices based on giant magnetoresistance effect. In this letter, we report on lateral electric-field driven strain-mediated modulation of magnetic properties in Co$/$Cu$/$Py pseudo spin valve grown on ferroelectric PMN-PT substrate. We show a decrease of the giant magnetoresistance ratio of the pseudo spin valve with increasing electric field, which is attributed to the deviation of the Co layer magnetization from the initial direction due to strain-induced magnetoelastic anisotropy contribution. Additionally, we demonstrate that strain-induced magnetic anisotropy effectively shifts the switching field of the magnetostrictive Co layer, while keeping the switching field of the nearly zero-magnetostrictive Py layer unaffected due to its negligible magnetostriction constant. We argue that magnetostrictively optimized magnetic films in properly engineered multilayered structures can offer a path to enhancing the selective magnetic switching in spintronic devices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑