FePt 纳米颗粒中自旋波孤子的非平衡自组装
材料科学
2021-11-03 v1
摘要
磁性纳米颗粒，如 L10 相的 FePt，是我们当前数据存储技术的基石。随着晶粒尺寸不断缩小以满足技术需求，超顺磁极限要求使用具有更高磁晶各向异性的材料。这反过来又将磁交换长度减小到仅几纳米，使得在纳米颗粒内部诱导产生磁性结构成为可能。本文描述了 FePt 纳米颗粒中自旋波孤子（即自旋波激发的动态局域束缚态）的存在。我们通过时间分辨 X 射线衍射和微磁模拟表明，在飞秒激光激发后，亚 10 纳米尺寸的自旋波孤子从退磁状态中形成。测得的孤子自旋进动频率为 0.1 THz，这使该系统成为一个开发能够填补太赫兹间隙的微型器件的平台。
引用
@article{arxiv.2111.01649,
title = {Non-equilibrium self-assembly of spin-wave solitons in FePt nanoparticles},
author = {D. Turenne and A. Yaroslavtsev and X. Wang and V. Unikandanuni and I. Vaskivskyi and M. Schneider and E. Jal and R. Carley and G. Mercurio and R. Gort and N. Agarwal and B. Van Kuiken and L. Mercadier and J. Schlappa and L. Le Guyader and N. Gerasimova and M. Teichmann and D. Lomidze and A. Castoldi and D. Potorochin and D. Mukkattukavil and J. Brock and N. Z. Hagström and A. H. Reid and X. Shen and X. J. Wang and P. Maldonado and Y. Kvashnin and K. Carva and J. Wang and Y. K. Takahashi and E. E. Fullerton and S. Eisebitt and P. M. Oppeneer and S. Molodtsov and A. Scherz and S. Bonetti and E. Iacocca and H. A. Dürr},
journal= {arXiv preprint arXiv:2111.01649},
year = {2021}
}
备注
32 pages, please check the "attachemnts" tab in the pdf file in order to see the movie