Separation of linear and quadratic magneto-optic Kerr effects in ultra-thin Fe films using a rotating field method

Liang, Jianhui; Cao, J. Z.; Li, J. X.; Wu, Y. Z.

doi:10.1063/1.4918776

Cited by 5 publications

(5 citation statements)

References 18 publications

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“…5(c) ) the sudden increase of the MOKE intensity than the positive saturation one indicates presence of transverse component in the sample. As discussed earlier, this asymmetry (sudden increase) in the hysteresis loop arises due to the dominance of quadratic component of MOKE over the linear one 39 – 43 . It should be noted that the asymmetry present in the loop along ϕ = 45° (Fig.…”

Section: Resultsmentioning

confidence: 68%

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Effect of magnetic fullerene on magnetization reversal created at the Fe/C60 interface

Mallik

Mattauch

Dalai

et al. 2018

Sci Rep

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Probing the hybridized magnetic interface between organic semiconductor (OSC) and ferromagnetic (FM) layers has drawn significant attention in recent years because of their potential in spintronic applications. Recent studies demonstrate various aspects of organic spintronics such as magnetoresistance, induced interface moment etc. However, not much work has been performed to investigate the implications of such OSC/FM interfaces on the magnetization reversal and domain structure which are the utmost requirements for any applications. Here, we show that non-magnetic Fullerene can obtain non-negligible magnetic moment at the interface of Fe(15 nm)/C60(40 nm) bilayer. This leads to substantial effect on both the magnetic domain structure as well as the magnetization reversal when compared to a single layer of Fe(15 nm). This is corroborated by the polarized neutron reflectivity (PNR) data which indicates presence of hybridization at the interface by the reduction of magnetic moment in Fe. Afterwards, upto 1.9 nm of C60 near the interface exhibits magnetic moment. From the PNR measurements it was found that the magnetic C60 layer prefers to be aligned anti-parallel with the Fe layer at the remanant state. The later observation has been confirmed by domain imaging via magneto-optic Kerr microscopy.

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Section: Resultsmentioning

confidence: 68%

“…It has been reported in previous literature that this asymmetry in hysteresis loops in Fe samples occurs due to the quadratic component of the MOKE. Near the hard axis of the sample the quadratic component becomes dominant over the linear one of the MOKE which gives rise to sudden jumps in hysteresis loops 39 – 43 . Further in Fig.…”

Section: Resultsmentioning

confidence: 99%

Effect of magnetic fullerene on magnetization reversal created at the Fe/C60 interface

Mallik

Mattauch

Dalai

et al. 2018

Sci Rep

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“…It should be noted that the quadratic magneto-optic Kerr signal may coexist with the linear Kerr signal. 29 However in our measurement, the quadratic Kerr signal is two orders smaller in comparison with the polar Kerr signal. The corresponding l(φ m ) curves are further calculated as shown in Fig.…”

Section: Resultsmentioning

confidence: 56%

Magnetic stripe domains of [Pt/Co/Cu]10 multilayer near spin reorientation transition

et al. 2016

Self Cite

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The dependence of magnetic anisotropy, magnetic domain patterns and magnetization reversal processes in [Pt/Co(tCo)/Cu]10 film stack epitaxied on Cu (111) substrate have been studied as a function of the Co layer thickness tCo, by magneto-optic polar Kerr magnetometry and microscopy. We find the film undergoes spin reorientation transition from out-of-plane to in-plane as tCo increases. The SRT thickness is verified by Rotating-field Magneto-Optic Kerr effect method. The film exhibits the stripe domain structures at remanence with the width decreasing while tCo approaches SRT. As demonstrated by the first order reversal curve measurement, the magnetization reversal process encompasses irreversible domain nucleation, domain annihilation at large field and reversible domain switching near remanence.

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“…[12][13][14] In the measurements of inplane magnetization, the Kerr signal depends on the first-order terms of magnetization (M L and M T ) as well as the secondorder terms of the magnetization (M L M T , M 2 L , and M 2 T ). [15][16][17][18] M L and M T are the longitudinal and transverse magnetization components, respectively. In various conditions, a quadratic magneto-optic effect is unavoidable.…”

Section: Introductionmentioning

confidence: 99%

“…In various conditions, a quadratic magneto-optic effect is unavoidable. [15,19] A coherent rotation model and a domain wall displacement model have been proposed to account for the magnetization reversal process. [20] Based on the coherent rotation model, the magnetization will change its orientation to minimize the energy of the system to reach an equilibrium state.…”

Section: Introductionmentioning

confidence: 99%

Study of magnetization reversal and anisotropy of single crystalline ultrathin Fe/MgO (001) film by magneto-optic Kerr effect

Zhang

et al. 2016

Chinese Phys. B

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The magnetization reversal process of Fe/MgO (001) thin film is investigated by combining transverse and longitudinal hysteresis loops. Owing to the competition between domain wall pinning energy and weak uniaxial magnetic anisotropy，the typical magnetization reversal process of Fe ultrathin film can take place via either an "l-jump" process near the easy axis, or a "2-jump" process near the hard axis, depending on the applied field orientation. Besides, the hysteresis loop presents strong asymmetry resulting from the variation of the detected light intensity due to the quadratic magneto-optic effect. Furthermore, we modify the detectable light intensity formula and simulate the hysteresis loops of the Kerr signal. The results show that they are in good agreement with the experimental data.

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Separation of linear and quadratic magneto-optic Kerr effects in ultra-thin Fe films using a rotating field method

Cited by 5 publications

References 18 publications

Effect of magnetic fullerene on magnetization reversal created at the Fe/C60 interface

Effect of magnetic fullerene on magnetization reversal created at the Fe/C60 interface

Magnetic stripe domains of [Pt/Co/Cu]10 multilayer near spin reorientation transition

Study of magnetization reversal and anisotropy of single crystalline ultrathin Fe/MgO (001) film by magneto-optic Kerr effect

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