Current induced magnetization switching in spin valves

H. Y T Nguyen, H. Yi, S. J. Joo, Kyoung Jin Lee, K. H. Shin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We have studied the current induced magnetization switching (CIMS) in cobalt-based spin valve structures. Two exchange bias spin valves with extended fixed ferromagnets adopted as a current lead have been chosen for the study. The difference between them is that in the first structure, labeled EBSV (Exchange-Biased Spin Valve), no nano-oxide layer (NOL) was applied, while in the second structure, named NOL-EBSV, a NOL is inserted into the exchange biased pinned ferromagnet lead. The CIMSs in these two structures and in a non-exchange biased one, called SSV serving as the reference sample, have been studied. The temperature and field dependence of switching current in EBSV and SSV are also investigated for a better understanding the effect of exchange pinning field on the CIMS. The experiment result of CIMS in the EBSV shows a significant reduction in switching current density by a factor of 4.8, compared with a non-exchange biased spin valve with similar layer thicknesses. A double large reduction of switching current density is observed in the NOL-EBSV. We qualitatively analyze the effect of the exchange bias pinning field as well as of the nano-oxide layer on the reduction of switching current. A quantitative interpretation of the enhancement of CIMS by nano-oxide layer has been done by a three dimensional calculation of spin transport in EBSV and NOL-EBSV.

Original languageEnglish
Title of host publication2006 IEEE Nanotechnology Materials and Devices Conference, NMDC
Pages184-185
Number of pages2
Volume1
DOIs
Publication statusPublished - 2006 Dec 1
Externally publishedYes
Event2006 IEEE Nanotechnology Materials and Devices Conference, NMDC - Gyeongju, Korea, Republic of
Duration: 2006 Oct 222006 Oct 25

Other

Other2006 IEEE Nanotechnology Materials and Devices Conference, NMDC
CountryKorea, Republic of
CityGyeongju
Period06/10/2206/10/25

Fingerprint

Induced currents
Magnetization
Oxides
Current density
Lead
Cobalt

Keywords

  • CIMS
  • Exchange-biased
  • Nano-oxide layer
  • Spin transfer torque
  • Spin valves

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Materials Science(all)

Cite this

Nguyen, H. Y. T., Yi, H., Joo, S. J., Lee, K. J., & Shin, K. H. (2006). Current induced magnetization switching in spin valves. In 2006 IEEE Nanotechnology Materials and Devices Conference, NMDC (Vol. 1, pp. 184-185). [4388736] https://doi.org/10.1109/NMDC.2006.4388736

Current induced magnetization switching in spin valves. / Nguyen, H. Y T; Yi, H.; Joo, S. J.; Lee, Kyoung Jin; Shin, K. H.

2006 IEEE Nanotechnology Materials and Devices Conference, NMDC. Vol. 1 2006. p. 184-185 4388736.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Nguyen, HYT, Yi, H, Joo, SJ, Lee, KJ & Shin, KH 2006, Current induced magnetization switching in spin valves. in 2006 IEEE Nanotechnology Materials and Devices Conference, NMDC. vol. 1, 4388736, pp. 184-185, 2006 IEEE Nanotechnology Materials and Devices Conference, NMDC, Gyeongju, Korea, Republic of, 06/10/22. https://doi.org/10.1109/NMDC.2006.4388736
Nguyen HYT, Yi H, Joo SJ, Lee KJ, Shin KH. Current induced magnetization switching in spin valves. In 2006 IEEE Nanotechnology Materials and Devices Conference, NMDC. Vol. 1. 2006. p. 184-185. 4388736 https://doi.org/10.1109/NMDC.2006.4388736
Nguyen, H. Y T ; Yi, H. ; Joo, S. J. ; Lee, Kyoung Jin ; Shin, K. H. / Current induced magnetization switching in spin valves. 2006 IEEE Nanotechnology Materials and Devices Conference, NMDC. Vol. 1 2006. pp. 184-185
@inproceedings{8fa28cec136c4d7d947dd9a0b5a92891,
title = "Current induced magnetization switching in spin valves",
abstract = "We have studied the current induced magnetization switching (CIMS) in cobalt-based spin valve structures. Two exchange bias spin valves with extended fixed ferromagnets adopted as a current lead have been chosen for the study. The difference between them is that in the first structure, labeled EBSV (Exchange-Biased Spin Valve), no nano-oxide layer (NOL) was applied, while in the second structure, named NOL-EBSV, a NOL is inserted into the exchange biased pinned ferromagnet lead. The CIMSs in these two structures and in a non-exchange biased one, called SSV serving as the reference sample, have been studied. The temperature and field dependence of switching current in EBSV and SSV are also investigated for a better understanding the effect of exchange pinning field on the CIMS. The experiment result of CIMS in the EBSV shows a significant reduction in switching current density by a factor of 4.8, compared with a non-exchange biased spin valve with similar layer thicknesses. A double large reduction of switching current density is observed in the NOL-EBSV. We qualitatively analyze the effect of the exchange bias pinning field as well as of the nano-oxide layer on the reduction of switching current. A quantitative interpretation of the enhancement of CIMS by nano-oxide layer has been done by a three dimensional calculation of spin transport in EBSV and NOL-EBSV.",
keywords = "CIMS, Exchange-biased, Nano-oxide layer, Spin transfer torque, Spin valves",
author = "Nguyen, {H. Y T} and H. Yi and Joo, {S. J.} and Lee, {Kyoung Jin} and Shin, {K. H.}",
year = "2006",
month = "12",
day = "1",
doi = "10.1109/NMDC.2006.4388736",
language = "English",
isbn = "1424405408",
volume = "1",
pages = "184--185",
booktitle = "2006 IEEE Nanotechnology Materials and Devices Conference, NMDC",

}

TY - GEN

T1 - Current induced magnetization switching in spin valves

AU - Nguyen, H. Y T

AU - Yi, H.

AU - Joo, S. J.

AU - Lee, Kyoung Jin

AU - Shin, K. H.

PY - 2006/12/1

Y1 - 2006/12/1

N2 - We have studied the current induced magnetization switching (CIMS) in cobalt-based spin valve structures. Two exchange bias spin valves with extended fixed ferromagnets adopted as a current lead have been chosen for the study. The difference between them is that in the first structure, labeled EBSV (Exchange-Biased Spin Valve), no nano-oxide layer (NOL) was applied, while in the second structure, named NOL-EBSV, a NOL is inserted into the exchange biased pinned ferromagnet lead. The CIMSs in these two structures and in a non-exchange biased one, called SSV serving as the reference sample, have been studied. The temperature and field dependence of switching current in EBSV and SSV are also investigated for a better understanding the effect of exchange pinning field on the CIMS. The experiment result of CIMS in the EBSV shows a significant reduction in switching current density by a factor of 4.8, compared with a non-exchange biased spin valve with similar layer thicknesses. A double large reduction of switching current density is observed in the NOL-EBSV. We qualitatively analyze the effect of the exchange bias pinning field as well as of the nano-oxide layer on the reduction of switching current. A quantitative interpretation of the enhancement of CIMS by nano-oxide layer has been done by a three dimensional calculation of spin transport in EBSV and NOL-EBSV.

AB - We have studied the current induced magnetization switching (CIMS) in cobalt-based spin valve structures. Two exchange bias spin valves with extended fixed ferromagnets adopted as a current lead have been chosen for the study. The difference between them is that in the first structure, labeled EBSV (Exchange-Biased Spin Valve), no nano-oxide layer (NOL) was applied, while in the second structure, named NOL-EBSV, a NOL is inserted into the exchange biased pinned ferromagnet lead. The CIMSs in these two structures and in a non-exchange biased one, called SSV serving as the reference sample, have been studied. The temperature and field dependence of switching current in EBSV and SSV are also investigated for a better understanding the effect of exchange pinning field on the CIMS. The experiment result of CIMS in the EBSV shows a significant reduction in switching current density by a factor of 4.8, compared with a non-exchange biased spin valve with similar layer thicknesses. A double large reduction of switching current density is observed in the NOL-EBSV. We qualitatively analyze the effect of the exchange bias pinning field as well as of the nano-oxide layer on the reduction of switching current. A quantitative interpretation of the enhancement of CIMS by nano-oxide layer has been done by a three dimensional calculation of spin transport in EBSV and NOL-EBSV.

KW - CIMS

KW - Exchange-biased

KW - Nano-oxide layer

KW - Spin transfer torque

KW - Spin valves

UR - http://www.scopus.com/inward/record.url?scp=50249126591&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=50249126591&partnerID=8YFLogxK

U2 - 10.1109/NMDC.2006.4388736

DO - 10.1109/NMDC.2006.4388736

M3 - Conference contribution

AN - SCOPUS:50249126591

SN - 1424405408

SN - 9781424405404

VL - 1

SP - 184

EP - 185

BT - 2006 IEEE Nanotechnology Materials and Devices Conference, NMDC

ER -