Temperature dependences of the spin transfer torque and tunneling magneto-resistance in magnetic metallic and tunneling junctions

Chun Yeol You; Seung Ho Song; Hyungsuk Kim

doi:10.1063/1.3631663

Temperature dependences of the spin transfer torque and tunneling magneto-resistance in magnetic metallic and tunneling junctions

Chun Yeol You, Seung Ho Song, Hyungsuk Kim

Department of Physics and Chemistry

Kwangwoon University

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

4 Scopus citations

Abstract

We investigate temperature dependences of the spin transfer torque (STT) and tunneling magnetoresistance (TMR) in the magnetic metallic junction (MMJ) and magnetic tunneling junction (MTJ). The temperature dependences of the in-plane and out-of-plane STTs are calculated with the Keldysh non-equilibrium Green's function method. We find that the temperature dependences of the in-plane and out-of-plane STTs for MTJ are strikingly deviated from the previous prediction [P. Bruno, Phys. Rev. B 52, 411 (1995)] for the interlayer exchange coupling, while ones for MMJ are well agreed with the prediction. Furthermore, the temperature dependences of the in-plane and out-of-plane STTs are varied with the bias voltage in different ways.

Original language	English
Article number	092504
Journal	Applied Physics Letters
Volume	99
Issue number	9
DOIs	https://doi.org/10.1063/1.3631663
State	Published - 29 Aug 2011

Bibliographical note

Funding Information:
This work has been supported by the Research Grant of Kwangwoon University in 2010 and (2010-0022040 and 2010-0023798) through the NRF of Korea funded by MEST. C.Y.Y. thank Professor Y. Suzuki, E. Tamura, K.-J. Lee, and H.-W. Lee.

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title = "Temperature dependences of the spin transfer torque and tunneling magneto-resistance in magnetic metallic and tunneling junctions",

abstract = "We investigate temperature dependences of the spin transfer torque (STT) and tunneling magnetoresistance (TMR) in the magnetic metallic junction (MMJ) and magnetic tunneling junction (MTJ). The temperature dependences of the in-plane and out-of-plane STTs are calculated with the Keldysh non-equilibrium Green's function method. We find that the temperature dependences of the in-plane and out-of-plane STTs for MTJ are strikingly deviated from the previous prediction [P. Bruno, Phys. Rev. B 52, 411 (1995)] for the interlayer exchange coupling, while ones for MMJ are well agreed with the prediction. Furthermore, the temperature dependences of the in-plane and out-of-plane STTs are varied with the bias voltage in different ways.",

author = "You, {Chun Yeol} and Song, {Seung Ho} and Hyungsuk Kim",

note = "Funding Information: This work has been supported by the Research Grant of Kwangwoon University in 2010 and (2010-0022040 and 2010-0023798) through the NRF of Korea funded by MEST. C.Y.Y. thank Professor Y. Suzuki, E. Tamura, K.-J. Lee, and H.-W. Lee.",

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AU - You, Chun Yeol

AU - Song, Seung Ho

AU - Kim, Hyungsuk

N1 - Funding Information: This work has been supported by the Research Grant of Kwangwoon University in 2010 and (2010-0022040 and 2010-0023798) through the NRF of Korea funded by MEST. C.Y.Y. thank Professor Y. Suzuki, E. Tamura, K.-J. Lee, and H.-W. Lee.

PY - 2011/8/29

Y1 - 2011/8/29

N2 - We investigate temperature dependences of the spin transfer torque (STT) and tunneling magnetoresistance (TMR) in the magnetic metallic junction (MMJ) and magnetic tunneling junction (MTJ). The temperature dependences of the in-plane and out-of-plane STTs are calculated with the Keldysh non-equilibrium Green's function method. We find that the temperature dependences of the in-plane and out-of-plane STTs for MTJ are strikingly deviated from the previous prediction [P. Bruno, Phys. Rev. B 52, 411 (1995)] for the interlayer exchange coupling, while ones for MMJ are well agreed with the prediction. Furthermore, the temperature dependences of the in-plane and out-of-plane STTs are varied with the bias voltage in different ways.

AB - We investigate temperature dependences of the spin transfer torque (STT) and tunneling magnetoresistance (TMR) in the magnetic metallic junction (MMJ) and magnetic tunneling junction (MTJ). The temperature dependences of the in-plane and out-of-plane STTs are calculated with the Keldysh non-equilibrium Green's function method. We find that the temperature dependences of the in-plane and out-of-plane STTs for MTJ are strikingly deviated from the previous prediction [P. Bruno, Phys. Rev. B 52, 411 (1995)] for the interlayer exchange coupling, while ones for MMJ are well agreed with the prediction. Furthermore, the temperature dependences of the in-plane and out-of-plane STTs are varied with the bias voltage in different ways.

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Temperature dependences of the spin transfer torque and tunneling magneto-resistance in magnetic metallic and tunneling junctions

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