A 4-Fold-Symmetry Hexagonal Ruthenium for Magnetic Heterostructures Exhibiting Enhanced Perpendicular Magnetic Anisotropy and Tunnel Magnetoresistance

被引：73

作者：

Wen, Zhenchao ^{[1
]}

Sukegawa, Hiroaki ^{[1
]}

Furubayashi, Takao ^{[1
]}

Koo, Jungwoo ^{[1
,2
]}

Inomata, Koichiro ^{[1
]}

Mitani, Seiji ^{[1
,2
]}

Hadorn, Jason Paul ^{[1
]}

Ohkubo, Tadakatsu ^{[1
]}

Hono, Kazuhiro ^{[1
,2
]}

机构：

[1] Natl Inst Mat Sci NIMS, Tsukuba, Ibaraki 3050047, Japan

[2] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058577, Japan

来源：

ADVANCED MATERIALS | 2014年 / 26卷 / 37期

基金：

日本科学技术振兴机构;

关键词：

4-fold-symmetry hexagonal ruthenium; magnetic heterostructures; perpendicular magnetic anisotropy; tunnel magnetoresistance; ROOM-TEMPERATURE; SPIN-TRANSFER; SPINTRONICS; ELECTRONICS; JUNCTIONS; FILMS;

D O I：

10.1002/adma.201401959

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A 4-fold-symmetry hexagonal Ru emerging in epitaxial MgO/Ru/Co2FeAl/MgO heterostructures is reported, in which an approximately Ru(022¯3) growth attributes to the lattice matching between MgO, Ru, and Co2FeAl. Perpendicular magnetic anisotropy of the Co2FeAl/MgO interface is substantially enhanced. The magnetic tunnel junctions (MTJs) incorporating this structure give rise to the largest tunnel magnetoresistance for perpendicular MTJs using low damping Heusler alloys. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：6483 / 6490

页数：8

共 35 条

[11] Simple rules for the understanding of Heusler compounds
Graf, Tanja
Felser, Claudia
Parkin, Stuart S. P.
[J]. PROGRESS IN SOLID STATE CHEMISTRY, 2011, 39 (01) : 1 - 50
[12] Ikeda S, 2010, NAT MATER, V9, P721, DOI [10.1038/NMAT2804, 10.1038/nmat2804]
[13] Large perpendicular magnetic anisotropy at Fe/MgO interface
Koo, J. W.
Mitani, S.
Sasaki, T. T.
Sukegawa, H.
Wen, Z. C.
Ohkubo, T.
Niizeki, T.
Inomata, K.
Hono, K.
[J]. APPLIED PHYSICS LETTERS, 2013, 103 (19)
[14] Giant tunneling magnetoresistance in epitaxial Co2MnSi/MgO/Co2MnSi magnetic tunnel junctions by half-metallicity of Co2MnSi and coherent tunneling
Liu, Hong-xi
Honda, Yusuke
Taira, Tomoyuki
Matsuda, Ken-ichi
Arita, Masashi
Uemura, Tetsuya
Yamamoto, Masafumi
[J]. APPLIED PHYSICS LETTERS, 2012, 101 (13)
[15] Current-induced magnetization reversal in nanopillars with perpendicular anisotropy
Mangin, S
Ravelosona, D
Katine, JA
Carey, MJ
Terris, BD
Fullerton, EE
[J]. NATURE MATERIALS, 2006, 5 (03) : 210 - 215
[16] Spin transfer in nanomagnetic devices with perpendicular anisotropy
Meng, H
Wang, JP
[J]. APPLIED PHYSICS LETTERS, 2006, 88 (17)
[17] Low damping constant for Co2FeAl Heusler alloy films and its correlation with density of states
Mizukami, S.
Watanabe, D.
Oogane, M.
Ando, Y.
Miura, Y.
Shirai, M.
Miyazaki, T.
[J]. JOURNAL OF APPLIED PHYSICS, 2009, 105 (07)
[18] Role of an interfacial FeO layer in the electric-field-driven switching of magnetocrystalline anisotropy at the Fe/MgO interface
Nakamura, Kohji
Akiyama, Toru
Ito, Tomonori
Weinert, M.
Freeman, A. J.
[J]. PHYSICAL REVIEW B, 2010, 81 (22)
[19] Large anisotropic Fe orbital moments in perpendicularly magnetized Co2FeAl Heusler alloy thin films revealed by angular-dependent x-ray magnetic circular dichroism
Okabayashi, Jun
Sukegawa, Hiroaki
Wen, Zhenchao
Inomata, Koichiro
Mitani, Seiji
[J]. APPLIED PHYSICS LETTERS, 2013, 103 (10)
[20] Giant tunnelling magnetoresistance at room temperature with MgO (100) tunnel barriers
Parkin, SSP
Kaiser, C
Panchula, A
Rice, PM
Hughes, B
Samant, M
Yang, SH
[J]. NATURE MATERIALS, 2004, 3 (12) : 862 - 867

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