Origin of magnetization decay in spin-dependent tunnel junctions

Martha McCartney, Rafal E. Dunin-Borkowski, Michael R. Scheinfein, David Smith, Savas Gider, Stuart S P Parkin

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Spin-dependent tunnel junctions based on magnetically hard and soft ferromagnetic layers separated by a thin insulating barrier have emerged as prime candidates for information storage. However, the observed instability of the magnetically hard reference layer, leading to magnetization decay during field cycling of the adjacent soft layer, is a serious concern for future device applications. Using Lorentz electron microscopy and micromagnetic simulations, the hard-layer decay was found to result from large fringing fields surrounding magnetic domain walls in the magnetically soft layer. The formation and motion of these walls causes statistical flipping of magnetic moments in randomly oriented grains of the hard layer, with a progressive trend toward disorder and eventual demagnetization.

Original languageEnglish (US)
Pages (from-to)1337-1340
Number of pages4
JournalScience
Volume286
Issue number5443
DOIs
StatePublished - Nov 12 1999

Fingerprint

tunnel junctions
magnetization
decay
demagnetization
magnetic domains
domain wall
electron microscopy
magnetic moments
disorders
trends
cycles
causes
simulation

ASJC Scopus subject areas

  • General

Cite this

McCartney, M., Dunin-Borkowski, R. E., Scheinfein, M. R., Smith, D., Gider, S., & Parkin, S. S. P. (1999). Origin of magnetization decay in spin-dependent tunnel junctions. Science, 286(5443), 1337-1340. https://doi.org/10.1126/science.286.5443.1337

Origin of magnetization decay in spin-dependent tunnel junctions. / McCartney, Martha; Dunin-Borkowski, Rafal E.; Scheinfein, Michael R.; Smith, David; Gider, Savas; Parkin, Stuart S P.

In: Science, Vol. 286, No. 5443, 12.11.1999, p. 1337-1340.

Research output: Contribution to journalArticle

McCartney, M, Dunin-Borkowski, RE, Scheinfein, MR, Smith, D, Gider, S & Parkin, SSP 1999, 'Origin of magnetization decay in spin-dependent tunnel junctions', Science, vol. 286, no. 5443, pp. 1337-1340. https://doi.org/10.1126/science.286.5443.1337
McCartney M, Dunin-Borkowski RE, Scheinfein MR, Smith D, Gider S, Parkin SSP. Origin of magnetization decay in spin-dependent tunnel junctions. Science. 1999 Nov 12;286(5443):1337-1340. https://doi.org/10.1126/science.286.5443.1337
McCartney, Martha ; Dunin-Borkowski, Rafal E. ; Scheinfein, Michael R. ; Smith, David ; Gider, Savas ; Parkin, Stuart S P. / Origin of magnetization decay in spin-dependent tunnel junctions. In: Science. 1999 ; Vol. 286, No. 5443. pp. 1337-1340.
@article{a66d26e49d33449e9af9e41b8c7d26d1,
title = "Origin of magnetization decay in spin-dependent tunnel junctions",
abstract = "Spin-dependent tunnel junctions based on magnetically hard and soft ferromagnetic layers separated by a thin insulating barrier have emerged as prime candidates for information storage. However, the observed instability of the magnetically hard reference layer, leading to magnetization decay during field cycling of the adjacent soft layer, is a serious concern for future device applications. Using Lorentz electron microscopy and micromagnetic simulations, the hard-layer decay was found to result from large fringing fields surrounding magnetic domain walls in the magnetically soft layer. The formation and motion of these walls causes statistical flipping of magnetic moments in randomly oriented grains of the hard layer, with a progressive trend toward disorder and eventual demagnetization.",
author = "Martha McCartney and Dunin-Borkowski, {Rafal E.} and Scheinfein, {Michael R.} and David Smith and Savas Gider and Parkin, {Stuart S P}",
year = "1999",
month = "11",
day = "12",
doi = "10.1126/science.286.5443.1337",
language = "English (US)",
volume = "286",
pages = "1337--1340",
journal = "Science",
issn = "0036-8075",
publisher = "American Association for the Advancement of Science",
number = "5443",

}

TY - JOUR

T1 - Origin of magnetization decay in spin-dependent tunnel junctions

AU - McCartney, Martha

AU - Dunin-Borkowski, Rafal E.

AU - Scheinfein, Michael R.

AU - Smith, David

AU - Gider, Savas

AU - Parkin, Stuart S P

PY - 1999/11/12

Y1 - 1999/11/12

N2 - Spin-dependent tunnel junctions based on magnetically hard and soft ferromagnetic layers separated by a thin insulating barrier have emerged as prime candidates for information storage. However, the observed instability of the magnetically hard reference layer, leading to magnetization decay during field cycling of the adjacent soft layer, is a serious concern for future device applications. Using Lorentz electron microscopy and micromagnetic simulations, the hard-layer decay was found to result from large fringing fields surrounding magnetic domain walls in the magnetically soft layer. The formation and motion of these walls causes statistical flipping of magnetic moments in randomly oriented grains of the hard layer, with a progressive trend toward disorder and eventual demagnetization.

AB - Spin-dependent tunnel junctions based on magnetically hard and soft ferromagnetic layers separated by a thin insulating barrier have emerged as prime candidates for information storage. However, the observed instability of the magnetically hard reference layer, leading to magnetization decay during field cycling of the adjacent soft layer, is a serious concern for future device applications. Using Lorentz electron microscopy and micromagnetic simulations, the hard-layer decay was found to result from large fringing fields surrounding magnetic domain walls in the magnetically soft layer. The formation and motion of these walls causes statistical flipping of magnetic moments in randomly oriented grains of the hard layer, with a progressive trend toward disorder and eventual demagnetization.

UR - http://www.scopus.com/inward/record.url?scp=0032723883&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032723883&partnerID=8YFLogxK

U2 - 10.1126/science.286.5443.1337

DO - 10.1126/science.286.5443.1337

M3 - Article

AN - SCOPUS:0032723883

VL - 286

SP - 1337

EP - 1340

JO - Science

JF - Science

SN - 0036-8075

IS - 5443

ER -