Effect of ion irradiation on the characteristics of magnetic tunnel junctions

T. Banerjee; T. Som; D. Kinjilal; J.S. Moodera

doi:10.1051/epjap:2005080

Effect of ion irradiation on the characteristics of magnetic tunnel junctions

T. Banerjee, T. Som, D. Kinjilal, J.S. Moodera

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

The effect of disorder caused by MeV heavy ion irradiation on the tunnel magnetoresistance (TMR) of magnetic tunnel junctions is investigated. Two types of tunnel junctions, viz. Co/Al2O3/Ni80Fe20 and Co/Gd-doped Al2O3/Ni80 Fe20 are studied. Upon 70 MeV Si ion irradiation at a fluence of 5 × 1011 ions/cm2, the undoped junctions show relatively small but irreversible change, while the Gd-doped junctions show a huge reduction, in TMR. In both cases junctions were completely destroyed by 200 MeV Ag ion irradiation at a fluence of 1×1011 ions/cm2. The results are attributed to the modification of the barrier and the neighboring interfaces caused by the high energy density deposited by incident ions.

Original language	Undefined
Article number	10.1051/epjap:2005080
Pages (from-to)	115-118
Number of pages	4
Journal	The European physical journal. Applied physics
Volume	32
Issue number	2
DOIs	https://doi.org/10.1051/epjap:2005080
Publication status	Published - 2005

Keywords

SMI-NE: From 2006 in EWI-NE
EWI-5378
IR-62937
METIS-226854

Access to Document

10.1051/epjap:2005080

http://eprints.eemcs.utwente.nl/secure2/5378/01/BANERJEE2005B.PDF

Cite this

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title = "Effect of ion irradiation on the characteristics of magnetic tunnel junctions",

abstract = "The effect of disorder caused by MeV heavy ion irradiation on the tunnel magnetoresistance (TMR) of magnetic tunnel junctions is investigated. Two types of tunnel junctions, viz. Co/Al2O3/Ni80Fe20 and Co/Gd-doped Al2O3/Ni80 Fe20 are studied. Upon 70 MeV Si ion irradiation at a fluence of 5 × 1011 ions/cm2, the undoped junctions show relatively small but irreversible change, while the Gd-doped junctions show a huge reduction, in TMR. In both cases junctions were completely destroyed by 200 MeV Ag ion irradiation at a fluence of 1×1011 ions/cm2. The results are attributed to the modification of the barrier and the neighboring interfaces caused by the high energy density deposited by incident ions.",

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author = "T. Banerjee and T. Som and D. Kinjilal and J.S. Moodera",

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TY - JOUR

T1 - Effect of ion irradiation on the characteristics of magnetic tunnel junctions

AU - Banerjee, T.

AU - Som, T.

AU - Kinjilal, D.

AU - Moodera, J.S.

N1 - Imported from SMI Reference manager

PY - 2005

Y1 - 2005

N2 - The effect of disorder caused by MeV heavy ion irradiation on the tunnel magnetoresistance (TMR) of magnetic tunnel junctions is investigated. Two types of tunnel junctions, viz. Co/Al2O3/Ni80Fe20 and Co/Gd-doped Al2O3/Ni80 Fe20 are studied. Upon 70 MeV Si ion irradiation at a fluence of 5 × 1011 ions/cm2, the undoped junctions show relatively small but irreversible change, while the Gd-doped junctions show a huge reduction, in TMR. In both cases junctions were completely destroyed by 200 MeV Ag ion irradiation at a fluence of 1×1011 ions/cm2. The results are attributed to the modification of the barrier and the neighboring interfaces caused by the high energy density deposited by incident ions.

AB - The effect of disorder caused by MeV heavy ion irradiation on the tunnel magnetoresistance (TMR) of magnetic tunnel junctions is investigated. Two types of tunnel junctions, viz. Co/Al2O3/Ni80Fe20 and Co/Gd-doped Al2O3/Ni80 Fe20 are studied. Upon 70 MeV Si ion irradiation at a fluence of 5 × 1011 ions/cm2, the undoped junctions show relatively small but irreversible change, while the Gd-doped junctions show a huge reduction, in TMR. In both cases junctions were completely destroyed by 200 MeV Ag ion irradiation at a fluence of 1×1011 ions/cm2. The results are attributed to the modification of the barrier and the neighboring interfaces caused by the high energy density deposited by incident ions.

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

KW - EWI-5378

KW - IR-62937

KW - METIS-226854

U2 - 10.1051/epjap:2005080

DO - 10.1051/epjap:2005080

M3 - Article

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