Low temperature divergence in the AHE and AMR of ultra-thin Pt/Co/Pt trilayers

E. Zion; N. Haham; L. Klein; A. Sharoni

doi:https://doi.org/10.1016/j.jmmm.2019.04.035

Low temperature divergence in the AHE and AMR of ultra-thin Pt/Co/Pt trilayers

E. Zion, N. Haham, L. Klein, A. Sharoni

Department of Physics

Bar-Ilan University

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

Abstract

We study the anomalous Hall effect (AHE) and anisotropic magnetoresistance (AMR) in a series of ultra-thin Pt/Co(x)/Pt trilayers (0.1nm⩽x⩽0.5nm). We find that the AHE exhibits a significant increase at low temperatures (T). This increase cannot be attributed to a trivial increase in magnetization or resistivity. A similar T dependence is observed in the AMR measurements. Interestingly, these effects show almost no dependence on cobalt thickness. Our measurements indicate that the deviation from common behavior can be attributed to an induced magnetic proximity effect in the Pt layers that increases at low temperatures, in agreement with previous reports. An alternative explanation related to the evolution of a non-continuous magnetic layer is considered as well.

Original language	English
Pages (from-to)	314-319
Number of pages	6
Journal	Journal of Magnetism and Magnetic Materials
Volume	485
DOIs	https://doi.org/10.1016/j.jmmm.2019.04.035
State	Published - 1 Sep 2019

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Low temperature divergence in the AHE and AMR of ultra-thin Pt/Co/Pt trilayers",

abstract = "We study the anomalous Hall effect (AHE) and anisotropic magnetoresistance (AMR) in a series of ultra-thin Pt/Co(x)/Pt trilayers (0.1nm⩽x⩽0.5nm). We find that the AHE exhibits a significant increase at low temperatures (T). This increase cannot be attributed to a trivial increase in magnetization or resistivity. A similar T dependence is observed in the AMR measurements. Interestingly, these effects show almost no dependence on cobalt thickness. Our measurements indicate that the deviation from common behavior can be attributed to an induced magnetic proximity effect in the Pt layers that increases at low temperatures, in agreement with previous reports. An alternative explanation related to the evolution of a non-continuous magnetic layer is considered as well.",

author = "E. Zion and N. Haham and L. Klein and A. Sharoni",

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T1 - Low temperature divergence in the AHE and AMR of ultra-thin Pt/Co/Pt trilayers

AU - Zion, E.

AU - Haham, N.

AU - Klein, L.

AU - Sharoni, A.

PY - 2019/9/1

Y1 - 2019/9/1

N2 - We study the anomalous Hall effect (AHE) and anisotropic magnetoresistance (AMR) in a series of ultra-thin Pt/Co(x)/Pt trilayers (0.1nm⩽x⩽0.5nm). We find that the AHE exhibits a significant increase at low temperatures (T). This increase cannot be attributed to a trivial increase in magnetization or resistivity. A similar T dependence is observed in the AMR measurements. Interestingly, these effects show almost no dependence on cobalt thickness. Our measurements indicate that the deviation from common behavior can be attributed to an induced magnetic proximity effect in the Pt layers that increases at low temperatures, in agreement with previous reports. An alternative explanation related to the evolution of a non-continuous magnetic layer is considered as well.

AB - We study the anomalous Hall effect (AHE) and anisotropic magnetoresistance (AMR) in a series of ultra-thin Pt/Co(x)/Pt trilayers (0.1nm⩽x⩽0.5nm). We find that the AHE exhibits a significant increase at low temperatures (T). This increase cannot be attributed to a trivial increase in magnetization or resistivity. A similar T dependence is observed in the AMR measurements. Interestingly, these effects show almost no dependence on cobalt thickness. Our measurements indicate that the deviation from common behavior can be attributed to an induced magnetic proximity effect in the Pt layers that increases at low temperatures, in agreement with previous reports. An alternative explanation related to the evolution of a non-continuous magnetic layer is considered as well.

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U2 - https://doi.org/10.1016/j.jmmm.2019.04.035

DO - https://doi.org/10.1016/j.jmmm.2019.04.035

M3 - مقالة

SN - 0304-8853

VL - 485

SP - 314

EP - 319

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

ER -

Low temperature divergence in the AHE and AMR of ultra-thin Pt/Co/Pt trilayers

Abstract

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