Large magnetoresistance in Co/Ni/Co ferromagnetic single electron transistors

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Large magnetoresistance in Co/Ni/Co ferromagnetic single electron transistors. / Liu, Ruisheng; Pettersson, H.; Michalak, L.; Canali, C. M.; Suyatin, Dmitry; Samuelson, Lars.

I: Applied Physics Letters, Vol. 90, Nr. 12, 2007.

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Liu, Ruisheng ; Pettersson, H. ; Michalak, L. ; Canali, C. M. ; Suyatin, Dmitry ; Samuelson, Lars. / Large magnetoresistance in Co/Ni/Co ferromagnetic single electron transistors. I: Applied Physics Letters. 2007 ; Vol. 90, Nr. 12.

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TY - JOUR

T1 - Large magnetoresistance in Co/Ni/Co ferromagnetic single electron transistors

AU - Liu, Ruisheng

AU - Pettersson, H.

AU - Michalak, L.

AU - Canali, C. M.

AU - Suyatin, Dmitry

AU - Samuelson, Lars

PY - 2007

Y1 - 2007

N2 - The authors report on magnetotransport investigations of nanoscaled ferromagnetic Co/Ni/Co single electron transistors. As a result of reduced size, the devices exhibit single electron transistor characteristics at 4.2 K. Magnetotransport measurements carried out at 1.8 K reveal tunneling magnetoresistance (TMR) traces with negative coercive fields, which the authors interpret in terms of a switching mechanism driven by the shape anisotropy of the central wirelike Ni island. A large TMR of about 18% is observed within a finite source-drain bias regime. The TMR decreases rapidly with increasing bias, which the authors tentatively attribute to excitation of magnons in the central island. (c) 2007 American Institute of Physics.

AB - The authors report on magnetotransport investigations of nanoscaled ferromagnetic Co/Ni/Co single electron transistors. As a result of reduced size, the devices exhibit single electron transistor characteristics at 4.2 K. Magnetotransport measurements carried out at 1.8 K reveal tunneling magnetoresistance (TMR) traces with negative coercive fields, which the authors interpret in terms of a switching mechanism driven by the shape anisotropy of the central wirelike Ni island. A large TMR of about 18% is observed within a finite source-drain bias regime. The TMR decreases rapidly with increasing bias, which the authors tentatively attribute to excitation of magnons in the central island. (c) 2007 American Institute of Physics.

U2 - 10.1063/1.2714289

DO - 10.1063/1.2714289

M3 - Article

VL - 90

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 12

ER -