Coherent tunneling and giant tunneling magnetoresistance in Co2FeAl/MgO/CoFe magnetic tunneling junctions

被引：129

作者：

Wang, Wenhong ^{[1
,2
]}

Liu, Enke ^{[2
]}

Kodzuka, Masaya ^{[1
,3
]}

Sukegawa, Hiroaki ^{[1
]}

Wojcik, Marec ^{[4
]}

Jedryka, Eva ^{[4
]}

Wu, G. H. ^{[2
]}

Inomata, Koichiro ^{[1
]}

Mitani, Seiji ^{[1
]}

Hono, Kazuhiro ^{[1
,3
]}

机构：

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

[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China

[3] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3050047, Japan

[4] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 14期

关键词：

ROOM-TEMPERATURE;

D O I：

10.1103/PhysRevB.81.140402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Spin-dependent coherent tunneling has been experimentally observed in high-quality sputtered-deposited Co2FeAl/MgO/CoFe epitaxial magnetic tunneling junctions (MTJs). Consequently, the microfabricated MTJs manifest a very large tunnel magnetoresistance (TMR) at room temperature and an unexpectedly TMR oscillation as a function of MgO barrier thickness. First-principles electronic band calculations confirm the pronounced coherent tunneling effect and are in good agreement with the experimental data. The present work demonstrates the importance of coherent tunneling for large TMR with Heusler alloys

引用

页数：4

共 50 条

[1] Giant tunneling magnetoresistance up to 330% at room temperature in sputter deposited Co2FeAl/MgO/CoFe magnetic tunnel junctions
Wang, Wenhong
Sukegawa, Hiroaki
Shan, Rong
Mitani, Seiji
Inomata, Koichiro
APPLIED PHYSICS LETTERS, 2009, 95 (18)
[2] Structural defects analysis versus spin polarized tunneling in Co2FeAl/MgO/CoFe magnetic tunnel junctions with thick MgO barriers
Gabor, M. S.
Tiusan, C.
Petrisor, T., Jr.
Petrisor, T.
Hehn, M.
Lu, Y.
Snoeck, E.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2013, 347 : 79 - 85
[3] Tunneling spectroscopy and magnon excitation in Co2FeAl/MgO/Co-Fe magnetic tunnel junctions
Ebke, Daniel
Drewello, Volker
Schaefers, Markus
Reiss, Guenter
Thomas, Andy
APPLIED PHYSICS LETTERS, 2009, 95 (23)
[4] Giant tunneling magnetoresistance in MgO-based magnetic tunnel junctions
Yuasa, Shinji
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2008, 77 (03)
[5] Temperature dependence of tunneling magnetoresistance in epitaxial magnetic tunnel junctions using a Co2FeAl Heusler alloy electrode
Wang, Wenhong
Sukegawa, Hiroaki
Inomata, Koichiro
PHYSICAL REVIEW B, 2010, 82 (09)
[6] The impact of boron doping in the tunneling magnetoresistance of Heusler alloy Co2FeAl
Habiboglu, Ali
Chandak, Yash
Khanal, Pravin
Larsen, Brecken
Zhou, Bowei
Eckel, Carter
Cutshall, Jacob
Warrilow, Kennedy
O'Brien, John
Hong, Brady
Schaibley, John R.
Leroy, Brian J.
Wang, Weigang
JOURNAL OF APPLIED PHYSICS, 2023, 134 (24)
[7] 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
APPLIED PHYSICS LETTERS, 2012, 101 (13)
[8] Effects of B and C doping on tunneling magnetoresistance in CoFe/MgO magnetic tunnel junctions
Chen, Andy Paul
Burton, J. D.
Tsymbal, Evgeny Y.
Feng, Yuan Ping
Chen, Jingsheng
PHYSICAL REVIEW B, 2018, 98 (04)
[9] Oscillation of giant tunneling magnetoresistance with respect to tunneling barrier thickness in fully epitaxial Fe/MgO/Fe magnetic tunnel junctions
Matsumoto, Rie
Fukushima, Akio
Nagahama, Taro
Suzuki, Yoshishige
Ando, Koji
Yuasa, Shinji
APPLIED PHYSICS LETTERS, 2007, 90 (25)
[10] Tunneling spectra of sputter-deposited CoFeB/MgO/CoFeB magnetic tunnel junctions showing giant tunneling magnetoresistance effect
Matsumoto, R
Hamada, Y
Mizuguchi, M
Shiraishi, M
Maehara, H
Tsunekawa, K
Djayaprawira, DD
Watanabe, N
Kurosaki, Y
Nagahama, T
Fukushima, A
Kubota, H
Yuasa, S
Suzuki, Y
SOLID STATE COMMUNICATIONS, 2005, 136 (11-12) : 611 - 615

← 1 2 3 4 5 →