兰州大学机构库 >物理科学与技术学院
Current-induced magnetization switching in Pt/Co/W and Pt/Co/W0.82Pt0.18 structures with perpendicular magnetic anisotropy
Zhang, Xu; Mao, Jian; Chang, Meixia; Yan, Ze; Zuo, YL(左亚路); Xi, L(席力)
2020-05-27
Source PublicationJournal of Physics D: Applied Physics   Impact Factor & Quartile Of Published Year  The Latest Impact Factor & Quartile
ISSN00223727
EISSN1361-6463
Volume53Issue:22
page numbers8
AbstractMagnetization switching caused by current-generated spin-orbit torques in heavy metal/ferromagnetic metal/heavy metal heterostructures has become a significant issue due to its excellent performance in low-power and high-density storage applications. In our work, based on Pt/Co/W and Pt/Co/W0.82Pt0.18 structures with perpendicular magnetic anisotropy (PMA),the effective spin Hall angles (θSHeff) of the Pt/Co/W and Pt/Co/W0.82Pt0.18 structures with different thicknesses of W and W0.82Pt0.18 alloy were determined by the harmonic measurements. We observed that the spin Hall angles were related to the thickness of the top-heavy metal layer. The magnetization switching efficiency is improved by the combined action of the bottom Pt and the top W due to the opposite signs of the spin Hall angles for the two heavy metals. When the thickness of the top-heavy metal layer reaches 3 nm, both Pt/Co/W and Pt/Co/W0.82Pt0.18 show their maximum effective spin Hall angles of 0.244 ± 0.008 and 0.223 ± 0.007, respectively. Nevertheless, the effective spin Hall angles were decreased with the thickness beyond 4 nm, which can be explained by the phase of W becomes a pure α-W from the mixed-phase of α-W and β-W. It indicates that the spin Hall angles of β-W were larger than α-W. Our results confirm an effective method to enhance the spin Hall angles and decrease the switching current density. © 2020 IOP Publishing Ltd.
KeywordBinary alloys Cobalt Heavy metals Magnetic anisotropy Magnetization Platinum metals Spin orbit coupling SwitchingCombined actions Current-induced magnetization switching Harmonic measurements Magnetization switching Mixed phase Perpendicular magnetic anisotropy Spin orbits Switching current density
PublisherIOP Publishing Ltd
DOI10.1088/1361-6463/ab7c9b
Indexed ByEI ; SCIE
Language英语
WOS Research AreaPhysics
WOS SubjectPhysics, Applied
WOS IDWOS:000523434300001
EI Accession Number20202008663484
EI KeywordsPlatinum alloys
EI Classification Number531 Metallurgy and Metallography ; 547.1 Precious Metals ; 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals ; 701.2 Magnetism: Basic Concepts and Phenomena
Original Document TypeArticle
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/440448
Collection物理科学与技术学院
Corresponding AuthorZuo, Yalu
Affiliation
Key Laboratory for Magnetism and Magnetic Materials, Ministry of Education, School of Physical Science and Technology, Lanzhou University, Lanzhou; 730000, China
First Author AffilicationSchool of Physical Science and Technology
Corresponding Author AffilicationSchool of Physical Science and Technology
First Signature AffilicationSchool of Physical Science and Technology
Recommended Citation
GB/T 7714
Zhang, Xu,Mao, Jian,Chang, Meixia,et al. Current-induced magnetization switching in Pt/Co/W and Pt/Co/W0.82Pt0.18 structures with perpendicular magnetic anisotropy[J]. Journal of Physics D: Applied Physics,2020,53(22).
APA Zhang, Xu,Mao, Jian,Chang, Meixia,Yan, Ze,Zuo, Yalu,&Xi, Li.(2020).Current-induced magnetization switching in Pt/Co/W and Pt/Co/W0.82Pt0.18 structures with perpendicular magnetic anisotropy.Journal of Physics D: Applied Physics,53(22).
MLA Zhang, Xu,et al."Current-induced magnetization switching in Pt/Co/W and Pt/Co/W0.82Pt0.18 structures with perpendicular magnetic anisotropy".Journal of Physics D: Applied Physics 53.22(2020).
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