Band Structure and Density of States Effects in Co-Based Magnetic Tunnel Junctions

P. LeClair; J.T. Kohlhepp; C.H. van de Vin; H. Wieldraaijer; H.J.M. Swagten; W.J.M. de Jonge; A.H. Davis; J.M. MacLaren; J.S. Moodera; R. Jansen

doi:10.1103/PhysRevLett.88.107201

Band Structure and Density of States Effects in Co-Based Magnetic Tunnel Junctions

P. LeClair, J.T. Kohlhepp, C.H. van de Vin, H. Wieldraaijer, H.J.M. Swagten, W.J.M. de Jonge, A.H. Davis, J.M. MacLaren, J.S. Moodera, R. Jansen

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Abstract

Utilizing CoAl...O Co magnetic tunnel junctions with Co electrodes of different crystalline phases, a clear relationship between electrode crystal structure and junction transport properties is presented. For junctions with one fcc(111) textured and one polycrystalline (polyphase and polydirectional) Co electrode, a strong asymmetry is observed in the magnetotransport properties, while when both electrodes are polycrystalline the magnetotransport is essentially symmetric. These observations are successfully explained within a model based on ballistic tunneling between the calculated band structures (density of states) of fcc-Co and hcp-Co.

Original language	Undefined
Pages (from-to)	107201-1
Number of pages	4
Journal	Physical review letters
Volume	88
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.88.107201
Publication status	Published - 2002

Keywords

EWI-5517
IR-44239
METIS-208690
SMI-NE: From 2006 in EWI-NE

Access to Document

10.1103/PhysRevLett.88.107201

band_structure

http://eprints.eemcs.utwente.nl/secure2/5517/01/LECLAIR2002.PDF

Cite this

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title = "Band Structure and Density of States Effects in Co-Based Magnetic Tunnel Junctions",

abstract = "Utilizing CoAl...O Co magnetic tunnel junctions with Co electrodes of different crystalline phases, a clear relationship between electrode crystal structure and junction transport properties is presented. For junctions with one fcc(111) textured and one polycrystalline (polyphase and polydirectional) Co electrode, a strong asymmetry is observed in the magnetotransport properties, while when both electrodes are polycrystalline the magnetotransport is essentially symmetric. These observations are successfully explained within a model based on ballistic tunneling between the calculated band structures (density of states) of fcc-Co and hcp-Co.",

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T1 - Band Structure and Density of States Effects in Co-Based Magnetic Tunnel Junctions

AU - LeClair, P.

AU - Kohlhepp, J.T.

AU - van de Vin, C.H.

AU - Wieldraaijer, H.

AU - Swagten, H.J.M.

AU - de Jonge, W.J.M.

AU - Davis, A.H.

AU - MacLaren, J.M.

AU - Moodera, J.S.

AU - Jansen, R.

N1 - Imported from SMI Reference manager

PY - 2002

Y1 - 2002

N2 - Utilizing CoAl...O Co magnetic tunnel junctions with Co electrodes of different crystalline phases, a clear relationship between electrode crystal structure and junction transport properties is presented. For junctions with one fcc(111) textured and one polycrystalline (polyphase and polydirectional) Co electrode, a strong asymmetry is observed in the magnetotransport properties, while when both electrodes are polycrystalline the magnetotransport is essentially symmetric. These observations are successfully explained within a model based on ballistic tunneling between the calculated band structures (density of states) of fcc-Co and hcp-Co.

AB - Utilizing CoAl...O Co magnetic tunnel junctions with Co electrodes of different crystalline phases, a clear relationship between electrode crystal structure and junction transport properties is presented. For junctions with one fcc(111) textured and one polycrystalline (polyphase and polydirectional) Co electrode, a strong asymmetry is observed in the magnetotransport properties, while when both electrodes are polycrystalline the magnetotransport is essentially symmetric. These observations are successfully explained within a model based on ballistic tunneling between the calculated band structures (density of states) of fcc-Co and hcp-Co.

KW - EWI-5517

KW - IR-44239

KW - METIS-208690

KW - SMI-NE: From 2006 in EWI-NE

U2 - 10.1103/PhysRevLett.88.107201

DO - 10.1103/PhysRevLett.88.107201

M3 - Article

SN - 0031-9007

VL - 88

SP - 107201

EP - 107201

JO - Physical review letters

JF - Physical review letters

IS - 10

ER -