Role of phonon skew scattering in the spin Hall effect of platinum

G. V. Karnad; C. Gorini; K. Lee; T. Schulz; R. Lo Conte; A. W. J. Wells; D. -S. Han; K. Shahbazi; J. -S. Kim; T. A. Moore; H. J. M. Swagten; U. Eckern; R. Raimondi; M. Kläui

doi:10.1103/PhysRevB.97.100405

Role of phonon skew scattering in the spin Hall effect of platinum

G. V. Karnad, C. Gorini, K. Lee, T. Schulz, R. Lo Conte, A. W. J. Wells, D. -S. Han, K. Shahbazi, J. -S. Kim, T. A. Moore, H. J. M. Swagten, U. Eckern, R. Raimondi, M. Kläui

Department of Electronic & Electrical Engineering

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

21 Citations (SciVal)

Abstract

We measure and analyze the effective spin Hall angle of platinum in the low residual resistivity regime by second harmonic measurements of the spin-orbit torques for a multilayer of Pt/Co/AlO$_x$. An angular dependent study of the torques allows us to extract the effective spin Hall angle responsible for the damping-like torque in the system. We observe a strikingly non-monotonic and reproducible temperature dependence of the torques. This behavior is compatible with recent theoretical predictions which include both intrinsic and extrinsic (impurities and phonons) contributions to the spin Hall effect at finite temperature.

Original language	English
Article number	100405(R)
Journal	Physical Review B : Condensed Matter and Materials Physics
Volume	97
DOIs	https://doi.org/10.1103/PhysRevB.97.100405
Publication status	Published - 26 Mar 2018

Keywords

cond-mat.mes-hall

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10.1103/PhysRevB.97.100405

http://eprints.whiterose.ac.uk/130003/

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Karnad, G. V., Gorini, C., Lee, K., Schulz, T., Conte, R. L., Wells, A. W. J., Han, D. .-S., Shahbazi, K., Kim, J. .-S., Moore, T. A., Swagten, H. J. M., Eckern, U., Raimondi, R., & Kläui, M. (2018). Role of phonon skew scattering in the spin Hall effect of platinum. Physical Review B : Condensed Matter and Materials Physics, 97, Article 100405(R). https://doi.org/10.1103/PhysRevB.97.100405

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title = "Role of phonon skew scattering in the spin Hall effect of platinum",

abstract = " We measure and analyze the effective spin Hall angle of platinum in the low residual resistivity regime by second harmonic measurements of the spin-orbit torques for a multilayer of Pt/Co/AlO$_x$. An angular dependent study of the torques allows us to extract the effective spin Hall angle responsible for the damping-like torque in the system. We observe a strikingly non-monotonic and reproducible temperature dependence of the torques. This behavior is compatible with recent theoretical predictions which include both intrinsic and extrinsic (impurities and phonons) contributions to the spin Hall effect at finite temperature. ",

keywords = "cond-mat.mes-hall",

author = "Karnad, {G. V.} and C. Gorini and K. Lee and T. Schulz and Conte, {R. Lo} and Wells, {A. W. J.} and Han, {D. -S.} and K. Shahbazi and Kim, {J. -S.} and Moore, {T. A.} and Swagten, {H. J. M.} and U. Eckern and R. Raimondi and M. Kl{\"a}ui",

year = "2018",

month = mar,

day = "26",

doi = "10.1103/PhysRevB.97.100405",

language = "English",

volume = "97",

journal = "Physical Review B : Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society",

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TY - JOUR

T1 - Role of phonon skew scattering in the spin Hall effect of platinum

AU - Karnad, G. V.

AU - Gorini, C.

AU - Lee, K.

AU - Schulz, T.

AU - Conte, R. Lo

AU - Wells, A. W. J.

AU - Han, D. -S.

AU - Shahbazi, K.

AU - Kim, J. -S.

AU - Moore, T. A.

AU - Swagten, H. J. M.

AU - Eckern, U.

AU - Raimondi, R.

AU - Kläui, M.

PY - 2018/3/26

Y1 - 2018/3/26

N2 - We measure and analyze the effective spin Hall angle of platinum in the low residual resistivity regime by second harmonic measurements of the spin-orbit torques for a multilayer of Pt/Co/AlO$_x$. An angular dependent study of the torques allows us to extract the effective spin Hall angle responsible for the damping-like torque in the system. We observe a strikingly non-monotonic and reproducible temperature dependence of the torques. This behavior is compatible with recent theoretical predictions which include both intrinsic and extrinsic (impurities and phonons) contributions to the spin Hall effect at finite temperature.

AB - We measure and analyze the effective spin Hall angle of platinum in the low residual resistivity regime by second harmonic measurements of the spin-orbit torques for a multilayer of Pt/Co/AlO$_x$. An angular dependent study of the torques allows us to extract the effective spin Hall angle responsible for the damping-like torque in the system. We observe a strikingly non-monotonic and reproducible temperature dependence of the torques. This behavior is compatible with recent theoretical predictions which include both intrinsic and extrinsic (impurities and phonons) contributions to the spin Hall effect at finite temperature.

KW - cond-mat.mes-hall

U2 - 10.1103/PhysRevB.97.100405

DO - 10.1103/PhysRevB.97.100405

M3 - Article

SN - 1098-0121

VL - 97

JO - Physical Review B : Condensed Matter and Materials Physics

JF - Physical Review B : Condensed Matter and Materials Physics

M1 - 100405(R)

ER -

Role of phonon skew scattering in the spin Hall effect of platinum

Abstract

Keywords

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