Thermal Annealing Driven Enhancement of Perpendicular Magnetic Anisotropy and the Interfacial Dzyaloshinskii-Moriya Interaction in Ultrathin Ru/Co/W/Ru Films

被引：2

作者：

Samardak, Aleksei Yu. ^{[1
]}

Kolesnikov, Alexander ^{[1
]}

Stebliy, Maksim E. ^{[1
]}

Gerasimenko, Andrey V. ^{[2
]}

Sadovnikov, Alexandr, V ^{[1
,3
]}

Nikitov, Sergei A. ^{[1
,3
,4
]}

Pervishko, Anastasiia A. ^{[1
,5
]}

Yudin, Dmitry ^{[1
,5
]}

Ognev, Alexey, V ^{[1
]}

Tretiakov, Oleg A. ^{[6
]}

Wan, Caihua ^{[7
]}

Han, Xiu-Feng ^{[7
]}

Samardak, Alexander S. ^{[1
]}

机构：

[1] Far Eastern Fed Univ, Inst High Technol & Adv Mat, Lab Spin Orbitron, Vladivostok 690950, Russia

[2] Russian Acad Sci, Inst Chem, Far Eastern Branch, Vladivostok 690022, Russia

[3] Saratov NG Chernyshevskii State Univ, Lab Metamat, Saratov 410012, Russia

[4] Russian Acad Sci, Kotelnikov Inst Radioengn & Elect, Moscow 125009, Russia

[5] Skolkovo Inst Sci & Technol, Moscow 121205, Russia

[6] Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia

[7] Chinese Acad Sci, Univ Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

来源：

ACS APPLIED ELECTRONIC MATERIALS | 2023年 / 5卷 / 05期

基金：

中国国家自然科学基金; 澳大利亚研究理事会; 俄罗斯科学基金会;

关键词：

ultrathin film; perpendicular magnetic anisotropy; interfacial Dzyaloshinskii-Moriya interaction; thermal annealing; atom intermixing; TOTAL-ENERGY CALCULATIONS; COERCIVE FORCE; CO; COBALT; TEMPERATURE; DYNAMICS; ELEMENTS; METALS;

D O I：

10.1021/acsaelm.3c00254

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Spin-related effects discovered in ultrathin magnetic films generally have an interfacial nature. The quality of interfaces between a heavy metal and a ferromagnet is the main driver of surface anisotropy, antisymmetric exchange, chiral damping, spin Hall effect, and spin-orbit torques. To understand the physics and usage of these phenomena for future atomic-scale devices, one has to study systems with disordered interfaces and search there for novel practically desirable effects, which lie beyond the atomic order and surface flatness. Here, we report the interface-related effects in Ru/Co/W/Ru ultrathin films treated by thermal annealing in vacuum. The surface roughness and degree of atomic intermixing at Ru/Co and Co/W interfaces change with increasing annealing temperature up to 240 ?, promoting an enhancement of perpendicular magnetic anisotropy and the interfacial Dzyaloshinskii-Moriya interaction (i-DMI). Further annealing at higher temperatures brings the interface deterioration and, consequently, a drastic degradation of the magnetic properties. Our first-principles calculations qualitatively support the experimental findings, providing an understanding of the i-DMI enhancement nature.

引用

页码：2799 / 2808

页数：10

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