arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2109.05901cond-mat.mtrl-scicond-mat.mes-hallcond-mat.other
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YIG薄膜中基片取向对磁化动力学的控制

Control of magnetization dynamics by substrate orientation in YIG thin films

Ganesh Gurjar, Vinay Sharma, Bijoy K. Kuanr, S. Patnaik

摘要:

采用脉冲激光沉积(PLD)技术在(100)和(111)晶向的钆镓石榴石(GGG)单晶衬底上原位生长了钇铁石榴石(YIG)和铋(Bi)掺杂的YIG(Bi 0.1Y2.9Fe5O 12,BYG)薄膜。当Bi-YIG薄膜的取向从(100)转变为(111)时,由于Bi 3+离子在晶格中的十二面体位置的取向依赖性分布,晶格常数从12.384 μ m提高到12.401 μ m。原子力显微镜(AFM)图像显示Bi-YIG(111)中具有粗糙度为0.308 nm的光滑膜表面。基片取向的改变导致吉尔伯特阻尼的改变,从而引起铁磁共振(FMR)线宽的增强。对于YIG(100)取向的薄膜和Bi-YIG(111)取向的薄膜,吉尔伯特阻尼的最佳值分别为(0.54)× 10 ~(-4)和(6.27)× 10 ~(-4)。还进行了Hr的角度变化测量,其示出了(100)生长膜中的谐振场的四重对称性。此外,有效磁化强度(4πMeff)和非本征线宽(Δ H 0)的值与衬底取向有关。因此,PLD生长可以帮助单晶YIG和BYG薄膜具有完美的界面,可以用于自旋电子学和相关器件应用。

英文摘要:

Yttrium Iron Garnet (YIG) and bismuth (Bi) substituted YIG (Bi0.1Y2.9Fe5O12, BYG) films are grown in-situ on single crystalline Gadolinium Gallium Garnet (GGG) substrates [with (100) and (111) orientations] using pulsed laser deposition (PLD) technique. As the orientation of the Bi-YIG film changes from (100) to (111), the lattice constant is enhanced from 12.384 Å to 12.401 Å due to orientation dependent distribution of Bi3+ ions at dodecahedral sites in the lattice cell. Atomic force microscopy (AFM) images show smooth film surfaces with roughness 0.308 nm in Bi-YIG (111). The change in substrate orientation leads to the modification of Gilbert damping which, in turn, gives rise to the enhancement of ferromagnetic resonance (FMR) line width. The best values of Gilbert damping are found to be (0.54)*10-4, for YIG (100) and (6.27)*10-4, for Bi-YIG (111) oriented films. Angle variation measurements of the Hr are also performed, that shows a four-fold symmetry for the resonance field in the (100) grown film. In addition, the value of effective magnetization (4πMeff) and extrinsic linewidth (ΔH0) are observed to be dependent on substrate orientation. Hence PLD growth can assist single-crystalline YIG and BYG films with a perfect interface that can be used for spintronics and related device applications.

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。

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