Fully epitaxial Fe(110)/MgO(111)/Fe(110) magnetic tunnel junctions:: Growth, transport, and spin filtering properties

被引：15

作者：

Hauch, J. O. ^{[1
]}

Fonin, M. ^{[2
]}

Fraune, M. ^{[1
]}

Turban, P. ^{[3
]}

Guerrero, R. ^{[4
]}

Aliev, F. G. ^{[4
]}

Mayer, J. ^{[5
]}

Ruediger, U. ^{[2
]}

Guentherodt, G. ^{[1
]}

机构：

[1] Univ Aachen, Rhein Westfal TH Aachen, Inst Phys 2, D-52056 Aachen, Germany

[2] Univ Konstanz, Fachbereich Phys, D-78457 Constance, Germany

[3] Univ Rennes, CNRS, Inst Phys Rennes, Equipe Phys Surface & Interface,UMR 6251, F-35042 Rennes, France

[4] Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, Spain

[5] Univ Aachen, Rhein Westfal TH Aachen, D-52056 Aachen, Germany

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 08期

关键词：

D O I：

10.1063/1.2976546

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Fully epitaxial Fe(110)/MgO(111)/Fe(110) magnetic tunnel junctions (MTJs) have been tested with respect to symmetry-enforced spin filtering. The Fe(110) electrodes exhibit Sigma(1 up arrow) and Sigma(1 down arrow) spin states, both crossing the Fermi level, but with a group velocity about 50% smaller for the minority states compared to the majority ones. These epitaxial but symmetry-mismatched MTJs yield tunneling magnetoresistance (TMR) values of 54% at 1.5 K and 28% at room temperature. The TMR value and the estimated tunneling spin polarization are consistent with a partial spin filtering due to the Sigma(1 up arrow). states partially compensated by the Sigma(1 down arrow). states. (C) 2008 American Institute of Physics.

引用

页数：3

共 29 条

[1]

Observation of Fowler-Nordheim hole tunneling across an electron tunnel junction due to total symmetry filtering [J].

Bowen, M ;

Barthelemy, A ;

Bellini, V ;

Bibes, M ;

Seneor, P ;

Jacquet, E ;

Contour, JP ;

Dederichs, PH .

PHYSICAL REVIEW B, 2006, 73 (14)

[2]

Large magnetoresistance in Fe/MgO/FeCo(001) epitaxial tunnel junctions on GaAs(001) [J].

Bowen, M ;

Cros, V ;

Petroff, F ;

Fert, A ;

Boubeta, CM ;

Costa-Krämer, JL ;

Anguita, JV ;

Cebollada, A ;

Briones, F ;

de Teresa, JM ;

Morellón, L ;

Ibarra, MR ;

Güell, F ;

Peiró, F ;

Cornet, A .

APPLIED PHYSICS LETTERS, 2001, 79 (11) :1655-1657

[3]

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)

[4]

ENERGY-BANDS IN FERROMAGNETIC IRON [J].

CALLAWAY, J ;

WANG, CS .

PHYSICAL REVIEW B, 1977, 16 (05) :2095-2105

[5]

ELECTRONIC BAND-STRUCTURE OF MAGNESIUM AND CALCIUM OXIDES [J].

DAUDE, N ;

JOUANIN, C ;

GOUT, C .

PHYSICAL REVIEW B, 1977, 15 (04) :2399-2405

[6]

Evidence for the half-metallic ferromagnetic state of Fe3O4 by spin-resolved photoelectron spectroscopy -: art. no. 064417 [J].

Dedkov, YS ;

Rüdiger, U ;

Güntherodt, G .

PHYSICAL REVIEW B, 2002, 65 (06) :1-5

[7]

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

[8]

EBERHARDT W, 1980, PHYS REV B, V21, P5572, DOI 10.1103/PhysRevB.21.5572

[9]

High tunnel magnetoresistance in epitaxial Fe/MgO/Fe tunnel junctions [J].

Faure-Vincent, J ;

Tiusan, C ;

Jouguelet, E ;

Canet, F ;

Sajieddine, M ;

Bellouard, C ;

Popova, E ;

Hehn, M ;

Montaigne, F ;

Schuhl, A .

APPLIED PHYSICS LETTERS, 2003, 82 (25) :4507-4509

[10]

Evidence of a symmetry-dependent metallic barrier in fully epitaxial MgO based magnetic tunnel junctions [J].

Greullet, F. ;

Tiusan, C. ;

Montaigne, F. ;

Hehn, M. ;

Halley, D. ;

Bengone, O. ;

Bowen, M. ;

Weber, W. .

PHYSICAL REVIEW LETTERS, 2007, 99 (18)

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