Ta/Co2FeSi/MgAl2O4/Pt多层膜系垂直磁各向异性研究

doi:10.11896/cldb.25080120

Abstract
Figure/Table
References
Related Citation (6)

Download:

Full Text ( PDF ) (5863KB)
Export: BibTeX | EndNote (RIS)

Abstract To address the limitations associated with conventional magnetic tunnel junctions such as limited spin polarization, interfacial defects, and thickness sensitivity, we devised a Ta/Co₂FeSi (CFS)/MgAl₂O₄ (MAO)/Pt multilayer structure. CFS has about 100% (theoretically) spin polarization and high Curie temperature, and the spinel MAO lattice matches the CFS lattice parameters. It has been demonstrated that perpendicular magnetic anisotropy (PMA) could be controlled by systematically altering the thickness of CFS, MAO, and Ta layers, as well as annealing temperatures. A strong PMA is seen at CFS thickness of 4 nm (K_eff=4.7×10⁵ erg/cm³). The MAO interface follows a thickness-temperature co optimization: the optimal annealing temperature increases with MAO thickness, and moderate thickening effectively suppresses PMA degradation induced by high temperature annealing. A 4 nm Ta buffer significantly enhances PMA, producing an effective anisotropy constant K_eff up to 6.42×10⁵ erg/cm³. Compared to a Pt buffer, Ta buffer further strengthens PMA, broadens the processing window, and reduces materials cost. These results establish an experimentally grounded pathway for materials selection and interface engineering toward high performance, cost effective spintronic devices.

Key words： perpendicular magnetic anisotropy Co₂FeSi MgAl₂O₄ remanence ratio

Published: 25 April 2026 Online: 2026-05-06

CLC number:

TB34

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	WANG Shangqian
	ZHANG Chaofan
	HAN Zhonghao
	LIU Jian
	WANG Ke

Cite this article:

WANG Shangqian,ZHANG Chaofan,HAN Zhonghao, et al. Study on Perpendicular Magnetic Anisotropy of Ta/Co₂FeSi/MgAl₂O₄/Pt Multilayer Films[J]. Materials Reports, 2026, 40(8): 25080120-5.

URL:

https://www.mater-rep.com/EN/10.11896/cldb.25080120 OR https://www.mater-rep.com/EN/Y2026/V40/I8/25080120

1 Jiang S, Nazir K, Yang K. ACS Applied Materials & Interfaces, 2022, 14(7), 9734.
2 Hadorn P, Sukegawa H, Ohkubo T, et al. Acta Materialia, 2018, 145, 306.
3 Arora M, Huebner R, Suess D, et al. Physical Review B, 2017, 96(2), 024401.
4 Tudu B, Tiwari A. Vacuum, 2017, 146, 329.
5 Saravanan L, Raja M, Prabhu D, et al. Journal of Magnetism and Magnetic Materials, 2018, 454, 267.
6 Ourdani D, Roussigné Y, Chérif S M, et al. Journal of Physics D: Applied Physics, 2022, 55, 485004.
7 Semiannikova Y A, Perevozchikova V Y, Irkhin V Y, et al. AIP Advances, 2021, 11, 015139.
8 Sofi A, Gupta D C. Journal of Solid State Chemistry, 2020, 284, 121178.
9 Sun B, Li G Q, Zhao W X, et al. Materials Letters, 2014, 123, 221.
10 Almasi H, Hickey D R, Newhouse-Illige T, et al. Applied Physics Letters, 2015, 106(18), 182406.
11 Du W. Study of stability and spin-orbit torque in thin films with perpendicular magnetic anisotropy. Ph. D. Thesis, University of Electronic Science and Technology of China, China, 2023(in Chinese).
杜伟. 垂直磁各向异性薄膜稳定性及自旋轨道转矩驱动研究. 博士学位论文, 电子科技大学, 2023.
12 Hirohata A, Sagar J, Lari L, et al. Applied Physics A, 2013, 111, 423.
13 Biswas S, Chaudhuri S, Kander N, et al. ACS Applied Electronic Materials, 2021, 3, 4522.
14 Scheike T, Sukegawa H, Inomata K, et al. Applied Physics Express, 2016, 9, 053004.
15 Saravanan L, Mishra V, Pandey L, et al. Journal of Magnetism and Magnetic Materials, 2022, 563, 169926.
16 Wang K, Xiao X P, Xu Z K, et al. Applied Physics A, 2021, 127, 725.
17 Wang K, Xu Z, Yu L, et al. Journal of Magnetism and Magnetic Materials, 2022, 560, 169643.
18 Akyol M. Journal of Superconductivity and Novel Magnetism, 2019, 32(3), 457.
19 Li M, Fang S, Shi H, et al. Journal of Alloys and Compounds, 2019, 791, 1152.
20 Yamamoto T, Nozaki T, Yakushiji K, et al. Acta Materialia, 2021, 216, 117097.
21 Arora M, Hubner R, Suess D, et al. Physical Review B, 2017, 96, 024401.
22 Qin X, Tan J, Xiu X, et al. Chinese Physics B, 2025, 34(3), 037502.
23 Wang K, Tang Y, Xiao X, et al. Surface Engineering, 2021, 37(4), 497.
24 Lakshmanan S, Muthuvel M R, Delhibabu P, et al. Physica Status Solidi A, 2018, 215(21), 1800316.
25 Dieny B, Chshiev M. Reviews of Modern Physics, 2017, 89(2), 025008.
26 Peng S, Wang M, Yang H, et al. Scientific Reports, 2015, 5(1), 18173.
27 Yamamoto T, Ichinose T, Uzuhashi J, et al. Acta Materialia, 2024, 267, 119749.
28 Park C, Zhu J G, Moneck M T, et al. Journal of Applied Physics, 2006, 99(8), 08A901.