MODULATION OF PERPENDICULAR MAGNETIC ANISOTROPY AND EXCHANGE BIAS IN [Co/Pd]-IrMn MULTILAYER NANO-ANTIDOT ARRAYS

Giáp Văn Cường; Chử Văn Thành; Đỗ Khánh Tùng; Nguyễn Thanh Hường; Đỗ Hùng Mạnh; Trần Đăng Thành; Nguyễn Thị Ngọc Anh

doi:10.34238/tnu-jst.6122

MODULATION OF PERPENDICULAR MAGNETIC ANISOTROPY AND EXCHANGE BIAS IN [Co/Pd]-IrMn MULTILAYER NANO-ANTIDOT ARRAYS

About this article

Received: 07/06/22 Revised: 14/07/22 Published: 14/07/22

Authors

1. Giap Van Cuong, Hung Yen University of Technology and Education
2. Chu Van Thanh, 1) Institute of Materials Science, VAST, 2) International Training Institute for Materials Science (ITIMS)
3. Do Khanh Tung, Institute of Materials Science, VAST
4. Nguyen Thanh Huong, Institute of Materials Science, VAST
5. Do Hung Manh, Institute of Materials Science, VAST
6. Tran Dang Thanh, Institute of Materials Science, VAST
7. Nguyen Thi Ngoc Anh , 1) Institute of Materials Science, VAST 2) Graduate University of Science and Technology, VAST

Abstract

The manipulation of magnetic anisotropy and exchange bias field (H_EB) in ferromagnet/antiferromagnet (FM/AFM) thin films could be the key in the development of the next generation of spintronic devices. In this paper, the possible modulation of the magnetic anisotropy and H_EB was investigated by the structural parameters of the nanoporous FM/AFM multilayer films. The [Co/Pd]-IrMn multilayers were sputtered on flat SiO₂ and self-organized nanoporous oxide (Al₂O₃, TiO₂)substrates with different pore size and surface morphology. The influence of surface morphology and pore size on the structure and magnetic of the nanoporous [Co/Pd] and [Co/Pd]-IrMn films were investigated carefully. All films (flat and porous ones) exhibit strong perpendicular magnetic anisotropy and large H_EB at room temperature, specially in the nanoporous TiO₂-[Co/Pd]-IrMnfilm. Moreover, a significant increase of the coercivity as well as a reduction of the remanence of the developed nanoporous thin films, which depends on the pore size and surface morphology, was also observed.

Keywords

Multilayer thin film; Antidot arrays structure; Perpendicular magnetic anisotropy; Perpendicular exchange bias; FM/AFM

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DOI: https://doi.org/10.34238/tnu-jst.6122

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