RETRACTED: Large Tunnel Magnetoresistance of 1056% at Room Temperature in MgO Based Double Barrier Magnetic Tunnel Junction (Retracted article. See vol. 4, artn no. 019201, 2011)

被引:61
作者
Jiang, Lixian [1 ]
Naganuma, Hiroshi [1 ]
Oogane, Mikihiko [1 ]
Ando, Yasuo [1 ]
机构
[1] Tohoku Univ, Dept Appl Phys, Grad Sch Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan
关键词
Silica;
D O I
10.1143/APEX.2.083002
中图分类号
O59 [应用物理学];
学科分类号
摘要
CoFeB/MgO/CoFeB/MgO/CoFeB double barrier magnetic tunnel junctions (DBMTJs) with thin middle layers were fabricated on SiO2/Si(001) substrates by r.f. magnetron sputtering. We successfully obtained a large tunnel magnetoresistance of 1056% at room temperature in a DBMTJ with a middle CoFeB layer thickness of 1.2 nm that was fabricated at a relatively low post-deposition annealing temperature of 350 degrees C. This DBMTJ also realized sharp magnetization switching in the free middle CoFeB layer, which is attributed to strong antiferromagnetic coupling between the exterior CoFeB and PtMn layers. These favorable magnetoresistive properties offer interesting possibilities for developing practical spintronics applications and noble magnetotransport physics. (C) 2009 The Japan Society of Applied Physics
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共 16 条
[1]   Spin-dependent tunneling conductance of Fe|MgO|Fe sandwiches -: art. no. 054416 [J].
Butler, WH ;
Zhang, XG ;
Schulthess, TC ;
MacLaren, JM .
PHYSICAL REVIEW B, 2001, 63 (05)
[2]   230% room-temperature magnetoresistance in CoFeB/MgO/CoFeB magnetic tunnel junctions [J].
Djayaprawira, DD ;
Tsunekawa, K ;
Nagai, M ;
Maehara, H ;
Yamagata, S ;
Watanabe, N ;
Yuasa, S ;
Suzuki, Y ;
Ando, K .
APPLIED PHYSICS LETTERS, 2005, 86 (09) :1-3
[3]   Effect of high annealing temperature on giant tunnel magnetoresistance ratio of CoFeB/MgO/CoFeB magnetic tunnel junctions [J].
Hayakawaa, J. ;
Ikeda, S. ;
Lee, Y. M. ;
Matsukura, F. ;
Ohno, H. .
APPLIED PHYSICS LETTERS, 2006, 89 (23)
[4]   Tunnel magnetoresistance of 604% at 300 K by suppression of Ta diffusion in CoFeB/MgO/CoFeB pseudo-spin-valves annealed at high temperature [J].
Ikeda, S. ;
Hayakawa, J. ;
Ashizawa, Y. ;
Lee, Y. M. ;
Miura, K. ;
Hasegawa, H. ;
Tsunoda, M. ;
Matsukura, F. ;
Ohno, H. .
APPLIED PHYSICS LETTERS, 2008, 93 (08)
[5]   Effect of electrode composition on the tunnel magnetoresistance of pseudo-spin-valve magnetic tunnel junction with a MgO tunnel barrier [J].
Lee, Y. M. ;
Hayakawa, J. ;
Ikeda, S. ;
Matsukura, F. ;
Ohno, H. .
APPLIED PHYSICS LETTERS, 2007, 90 (21)
[6]   Theory of tunneling magnetoresistance of an epitaxial Fe/MgO/Fe(001) junction [J].
Mathon, J ;
Umerski, A .
PHYSICAL REVIEW B, 2001, 63 (22)
[7]   GIANT MAGNETIC TUNNELING EFFECT IN FE/AL2O3/FE JUNCTION [J].
MIYAZAKI, T ;
TEZUKA, N .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1995, 139 (03) :L231-L234
[8]   LARGE MAGNETORESISTANCE AT ROOM-TEMPERATURE IN FERROMAGNETIC THIN-FILM TUNNEL-JUNCTIONS [J].
MOODERA, JS ;
KINDER, LR ;
WONG, TM ;
MESERVEY, R .
PHYSICAL REVIEW LETTERS, 1995, 74 (16) :3273-3276
[9]   Enhanced tunnel magnetoresistance due to spin dependent quantum well resonance in specific symmetry states of an ultrathin ferromagnetic electrode [J].
Niizeki, Tomohiko ;
Tezuka, Nobuki ;
Inomata, Koichiro .
PHYSICAL REVIEW LETTERS, 2008, 100 (04)
[10]   Quantum oscillation of the tunneling conductance in fully epitaxial double barrier magnetic tunnel junctions [J].
Nozaki, T ;
Tezuka, N ;
Inomata, K .
PHYSICAL REVIEW LETTERS, 2006, 96 (02)