Huge quadratic magneto-optical Kerr effect and magnetization reversal in the Co${}_2$FeSi Heusler compound

Abstract

Co${}_2$FeSi(100) films with L2${}_1$ structure deposited onto MgO(100) were studied exploiting both longitudinal (LMOKE) and quadratic (QMOKE) magneto-optical Kerr effect. The films exhibit a huge QMOKE signal with a maximum contribution of up to 30 mdeg, which is the largest QMOKE signal in reflection that has been measured thus far. This large value is a fingerprint of an exceptionally large spin-orbit coupling of second or higher order. The Co${}_2$FeSi(100) films exhibit a rather large coercivity of 350 and 70 Oe for film thicknesses of 22 and 98 nm, respectively. Despite the fact that the films are epitaxial, they do not provide an angular dependence of the anisotropy and the remanence in excess of 1% and 2%, respectively.

References in corpus (7)

• Geometric, electronic, and magnetic structure of Co${}_2$FeSi: Curie temperature and magnetic moment measurements and calculations
• Investigation of Co${}_2$FeSi: The Heusler compound with Highest Curie Temperature and Magnetic Moment
• Correlation in the transition metal based Heusler compounds Co${}_2$MnSi and Co${}_2$FeSi
• Electronic structure and spectroscopy of the quaternary Heusler alloy Co${}_2$Cr${}_{1-x}$Fe${}_x$Al
• Epitaxial film growth and magnetic properties of Co_2FeSi
• Separation of the first- and second-order contributions in magneto-optic Kerr effect magnetometry of epitaxial FeMn/NiFe bilayers
• Ion beam induced modification of exchange interaction and spin-orbit coupling in the Co${}_2$FeSi Heusler compound

Cited by in corpus (16)

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• Structural, magnetic, and transport properties of Co${}_2$FeSi Heusler films
• Quadratic magnetooptic Kerr effect spectroscopy of Fe epitaxial films on MgO(001) substrates
• Ion beam induced modification of exchange interaction and spin-orbit coupling in the Co${}_2$FeSi Heusler compound
• Quadratic-in-magnetization permittivity and conductivity tensor in cubic crystals
• Principal spectra describing magnetooptic permittivity tensor in cubic crystals
• Scaling of quadratic and linear magnetooptic Kerr effect spectra with L2${}_1$ ordering of Co${}_2$MnSi Heusler compound
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• Cubic magneto-optic Kerr effect in Co(111) thin films
• Cubic-in-magnetization contributions to the magneto-optic Kerr effect investigated for Ni(001) and Ni(111) thin films
• Magneto-optical Kerr effect of a Ni_{2.00}Mn_{1.16}Ga_{0.84} single crystal across austenite and intermartensite transitions