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.
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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-pp.ucl.ac.uk/id/eprint/10105135 |
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