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Thickness dependence and the role of spin transfer torque in nonlinear giant magnetoresistance of permalloy dual spin valves

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Thickness dependence and the role of spin transfer torque in nonlinear giant magnetoresistance of permalloy dual spin valves. / Banerjee, N.; Aziz, A.; Ali, M. et al.
In: Physical review B, Vol. 82, No. 22, 224402, 02.12.2010.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Banerjee, N, Aziz, A, Ali, M, Robinson, JWA, Hickey, BJ & Blamire, MG 2010, 'Thickness dependence and the role of spin transfer torque in nonlinear giant magnetoresistance of permalloy dual spin valves', Physical review B, vol. 82, no. 22, 224402. https://doi.org/10.1103/PhysRevB.82.224402

APA

Banerjee, N., Aziz, A., Ali, M., Robinson, J. W. A., Hickey, B. J., & Blamire, M. G. (2010). Thickness dependence and the role of spin transfer torque in nonlinear giant magnetoresistance of permalloy dual spin valves. Physical review B, 82(22), Article 224402. https://doi.org/10.1103/PhysRevB.82.224402

Vancouver

Banerjee N, Aziz A, Ali M, Robinson JWA, Hickey BJ, Blamire MG. Thickness dependence and the role of spin transfer torque in nonlinear giant magnetoresistance of permalloy dual spin valves. Physical review B. 2010 Dec 2;82(22):224402. doi: 10.1103/PhysRevB.82.224402

Author

Banerjee, N. ; Aziz, A. ; Ali, M. et al. / Thickness dependence and the role of spin transfer torque in nonlinear giant magnetoresistance of permalloy dual spin valves. In: Physical review B. 2010 ; Vol. 82, No. 22.

Bibtex

@article{09844aa1370b470488dea4fa5e843a66,
title = "Thickness dependence and the role of spin transfer torque in nonlinear giant magnetoresistance of permalloy dual spin valves",
abstract = "The recent discovery of nonlinear current-dependent magnetoresistance in dual spin valve devices [A. Aziz, O. P. Wessely, M. Ali, D. M. Edwards, C. H. Marrows, B. J. Hickey, and M. G. Blamire, Phys. Rev. Lett. 103, 237203 (2009)] opens up the possibility for distinct physics which extends the standard model of giant magnetoresistance. When the outer ferromagnetic layers of a dual spin valve are antiparallel, the resulting accumulation of spin in the middle ferromagnetic layer strongly modifies its bulk and interfacial spin asymmetry and resistance. Here, we report experimental evidence of the role of bulk spin accumulation in this nonlinear effect and show that interfacial spin accumulation alone cannot account for the observed dependence of the effect on the thickness of the middle ferromagnetic layer. It is also shown that spin torque acting on the middle ferromagnetic layer combined with the nonlinear effect might be useful in understanding the dynamical features associated with the nonlinear behavior.",
keywords = "TRANSPORT, MULTILAYERS, LAYERED MAGNETIC-STRUCTURES, Nonlinear GMR, Spintronics, Nanomagnets, Fabrication, spin transfer torque",
author = "N. Banerjee and A. Aziz and M. Ali and Robinson, {J. W. A.} and Hickey, {B. J.} and Blamire, {M. G.}",
note = "{\textcopyright} 2010 The American Physical Society",
year = "2010",
month = dec,
day = "2",
doi = "10.1103/PhysRevB.82.224402",
language = "English",
volume = "82",
journal = "Physical review B",
issn = "1098-0121",
publisher = "AMER PHYSICAL SOC",
number = "22",

}

RIS

TY - JOUR

T1 - Thickness dependence and the role of spin transfer torque in nonlinear giant magnetoresistance of permalloy dual spin valves

AU - Banerjee, N.

AU - Aziz, A.

AU - Ali, M.

AU - Robinson, J. W. A.

AU - Hickey, B. J.

AU - Blamire, M. G.

N1 - © 2010 The American Physical Society

PY - 2010/12/2

Y1 - 2010/12/2

N2 - The recent discovery of nonlinear current-dependent magnetoresistance in dual spin valve devices [A. Aziz, O. P. Wessely, M. Ali, D. M. Edwards, C. H. Marrows, B. J. Hickey, and M. G. Blamire, Phys. Rev. Lett. 103, 237203 (2009)] opens up the possibility for distinct physics which extends the standard model of giant magnetoresistance. When the outer ferromagnetic layers of a dual spin valve are antiparallel, the resulting accumulation of spin in the middle ferromagnetic layer strongly modifies its bulk and interfacial spin asymmetry and resistance. Here, we report experimental evidence of the role of bulk spin accumulation in this nonlinear effect and show that interfacial spin accumulation alone cannot account for the observed dependence of the effect on the thickness of the middle ferromagnetic layer. It is also shown that spin torque acting on the middle ferromagnetic layer combined with the nonlinear effect might be useful in understanding the dynamical features associated with the nonlinear behavior.

AB - The recent discovery of nonlinear current-dependent magnetoresistance in dual spin valve devices [A. Aziz, O. P. Wessely, M. Ali, D. M. Edwards, C. H. Marrows, B. J. Hickey, and M. G. Blamire, Phys. Rev. Lett. 103, 237203 (2009)] opens up the possibility for distinct physics which extends the standard model of giant magnetoresistance. When the outer ferromagnetic layers of a dual spin valve are antiparallel, the resulting accumulation of spin in the middle ferromagnetic layer strongly modifies its bulk and interfacial spin asymmetry and resistance. Here, we report experimental evidence of the role of bulk spin accumulation in this nonlinear effect and show that interfacial spin accumulation alone cannot account for the observed dependence of the effect on the thickness of the middle ferromagnetic layer. It is also shown that spin torque acting on the middle ferromagnetic layer combined with the nonlinear effect might be useful in understanding the dynamical features associated with the nonlinear behavior.

KW - TRANSPORT

KW - MULTILAYERS

KW - LAYERED MAGNETIC-STRUCTURES

KW - Nonlinear GMR

KW - Spintronics

KW - Nanomagnets

KW - Fabrication

KW - spin transfer torque

U2 - 10.1103/PhysRevB.82.224402

DO - 10.1103/PhysRevB.82.224402

M3 - Journal article

VL - 82

JO - Physical review B

JF - Physical review B

SN - 1098-0121

IS - 22

M1 - 224402

ER -