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Quadratic Magneto-Optic Kerr Effect Investigations of Fe(100) Grown on Ir(100)

Pradeep, AV and Ghosh, Sayak and Ajesh, KG and Kumar, Anil PS (2017) Quadratic Magneto-Optic Kerr Effect Investigations of Fe(100) Grown on Ir(100). In: IEEE International Magnetics Conference (Intermag), APR 24-28, 2017, Dublin, IRELAND.

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Official URL: http://doi.org/10.1109/TMAG.2017.2717802

Abstract

Magneto-optic Kerr effect (MOKE) is a widely used tool in surface physics to characterize magnetic thin films and single crystals. In most of its applications, the magneto-optic (MO) coupling is assumed to be linear on magnetization by neglecting the quadratic and higher dependences. However, recent observations have shown that the quadratic dependence cannot be always ignored, particularly in systems like ferromagnetic metal thin films, Heusler alloys, and even in half-metallic ferrimagnets. We have used a rotating field method to extract the QMOKE signal from Fe(100) film grown on (100) surface of a single crystal iridium. Our results show that the QMOKE signal from this system is comparable to the linear MOKE signal. We report the parameters L, b, and c which relate the linear (K) and quadratic (G and Delta G) MO coupling coefficients. The real part of L, b, and c obtained from Fe(100)/Ir(100) are -9.75 +/- 0.03 mdeg, 7.28 +/- 0.09 mdeg, and -5.0 +/- 0.1 mdeg, respectively.

Item Type: Conference Proceedings
Additional Information: Copy right for this article belongs to the IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 24 Nov 2017 09:49
Last Modified: 18 Feb 2019 11:08
URI: http://eprints.iisc.ac.in/id/eprint/58309

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