Enhanced magneto-optical Kerr effects in Py/Ag/Bi trilayers

Patricia Riego; Satoshi Tomita; Kaoru Murakami; Toshiyuki Kodama; Nobuyoshi Hosoito; Hisao Yanagi; Andreas Berger

doi:10.1088/1361-6463/aa69f9

Enhanced magneto-optical Kerr effects in Py/Ag/Bi trilayers

Patricia Riego, Satoshi Tomita, Kaoru Murakami, Toshiyuki Kodama, Nobuyoshi Hosoito, Hisao Yanagi, Andreas Berger

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

10 Citations (Scopus)

Abstract

We study the magneto-optical (MO) response of permalloy/silver/bismuth (Py/Ag/Bi) trilayer samples in reference to a control Py film by means of spectroscopic generalized MO ellipsometry. The trilayer structures show enhanced MO Kerr amplitude values compared to optical multilayer calculations based upon the Py film reference measurements, especially in the near-infrared region. This indicates that the optical interference conditions accounted for in the model are not sufficient to explain the influence of the Ag/Bi bilayer in the structure. Instead, the local optical and MO properties of the Py layer itself must be modified by the presence of the Ag/Bi bilayer, which could be caused by enhanced effective spin-orbit coupling.

Original language	English
Article number	19LT01
Journal	Journal of Physics D: Applied Physics
Volume	50
Issue number	19
DOIs	https://doi.org/10.1088/1361-6463/aa69f9
Publication status	Published - 2017 Apr 19
Externally published	Yes

Keywords

magnetic multilayer
magneto-optical Kerr effect
spectroscopic generalized magneto-optical ellipsometry
spinorbit coupling

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Acoustics and Ultrasonics
Surfaces, Coatings and Films

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10.1088/1361-6463/aa69f9

Cite this

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title = "Enhanced magneto-optical Kerr effects in Py/Ag/Bi trilayers",

abstract = "We study the magneto-optical (MO) response of permalloy/silver/bismuth (Py/Ag/Bi) trilayer samples in reference to a control Py film by means of spectroscopic generalized MO ellipsometry. The trilayer structures show enhanced MO Kerr amplitude values compared to optical multilayer calculations based upon the Py film reference measurements, especially in the near-infrared region. This indicates that the optical interference conditions accounted for in the model are not sufficient to explain the influence of the Ag/Bi bilayer in the structure. Instead, the local optical and MO properties of the Py layer itself must be modified by the presence of the Ag/Bi bilayer, which could be caused by enhanced effective spin-orbit coupling.",

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T1 - Enhanced magneto-optical Kerr effects in Py/Ag/Bi trilayers

AU - Riego, Patricia

AU - Tomita, Satoshi

AU - Murakami, Kaoru

AU - Kodama, Toshiyuki

AU - Hosoito, Nobuyoshi

AU - Yanagi, Hisao

AU - Berger, Andreas

PY - 2017/4/19

Y1 - 2017/4/19

N2 - We study the magneto-optical (MO) response of permalloy/silver/bismuth (Py/Ag/Bi) trilayer samples in reference to a control Py film by means of spectroscopic generalized MO ellipsometry. The trilayer structures show enhanced MO Kerr amplitude values compared to optical multilayer calculations based upon the Py film reference measurements, especially in the near-infrared region. This indicates that the optical interference conditions accounted for in the model are not sufficient to explain the influence of the Ag/Bi bilayer in the structure. Instead, the local optical and MO properties of the Py layer itself must be modified by the presence of the Ag/Bi bilayer, which could be caused by enhanced effective spin-orbit coupling.

AB - We study the magneto-optical (MO) response of permalloy/silver/bismuth (Py/Ag/Bi) trilayer samples in reference to a control Py film by means of spectroscopic generalized MO ellipsometry. The trilayer structures show enhanced MO Kerr amplitude values compared to optical multilayer calculations based upon the Py film reference measurements, especially in the near-infrared region. This indicates that the optical interference conditions accounted for in the model are not sufficient to explain the influence of the Ag/Bi bilayer in the structure. Instead, the local optical and MO properties of the Py layer itself must be modified by the presence of the Ag/Bi bilayer, which could be caused by enhanced effective spin-orbit coupling.

KW - magnetic multilayer

KW - magneto-optical Kerr effect

KW - spectroscopic generalized magneto-optical ellipsometry

KW - spinorbit coupling

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Enhanced magneto-optical Kerr effects in Py/Ag/Bi trilayers

Abstract

Keywords

ASJC Scopus subject areas

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