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Perpendicularly magnetized Ni/Pt (001) epitaxial superlattice

Seki, T; Tsujikawa, M; Ito, K; Uchida, K; Kurebayashi, H; Shirai, M; Takanashi, K; (2020) Perpendicularly magnetized Ni/Pt (001) epitaxial superlattice. Physical Review Materials , 4 (6) , Article 064413. 10.1103/PhysRevMaterials.4.064413. Green open access

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Abstract

A perpendicularly magnetized ferromagnetic layer is an important building block for recent/future high-density spintronic memory applications. This paper reports the fabrication of perpendicularly magnetized Ni/Pt superlattices and the characterization of their structures and magnetic properties. The optimization of film growth conditions allowed us to grow epitaxial Ni/Pt (001) superlattices on SrTiO_{3} single-crystal substrates. We investigated their structural parameters and magnetic properties as a function of the Ni layer thickness and obtained a high uniaxial magnetic anisotropy energy of 1.9 x 10^{6} erg/cm^{3} for for a [Ni (4.0 nm)/Pt (1.0 nm)] superlattice. In order to elucidate the detailed mechanism on perpendicular magnetic anisotropy for the Ni/Pt (001) superlattices, the experimental results were compared with the first-principles calculations. It has been found that the strain effect is a prime source of the emergence of perpendicular magnetic anisotropy.

Type: Article
Title: Perpendicularly magnetized Ni/Pt (001) epitaxial superlattice
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevMaterials.4.064413
Publisher version: https://doi.org/10.1103/PhysRevMaterials.4.064413
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: https://discovery.ucl.ac.uk/id/eprint/10105135
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