Magnetooptic Kerr effect and Faraday effect on Ni-Fe alloys

Drews, Ulrich; Jaumann, Johannes

doi:10.1109/tmag.1969.1066594

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…Figure 5 shows measurements of the optical constants for this low k medium in the as-deposited state. The values for the refractive index n are in good agreement with those previously reported for bulk material [7] but the k values are different. Since the absorption coefficient is a very strong function of wavelength in this part of the spectrum the relatively poor agreement in the k values is perhaps not surprising.…”

Section: Instrument Performancesupporting

confidence: 89%

Programmable liquid crystal waveplates in ellipsometric measurements

Carey

Gago‐Sandoval

Newman

et al. 1996

Meas. Sci. Technol.

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High-birefringent, nematic liquid crystal waveplates, using low-voltage electrical drive signals to provide programmable retardances over several hundred nanometres, have recently become commercially available. Using one of these electro-optic devices for both phase and polarization modulation, we have developed a simple, semi-automatic, null, broadband ellipsometer. This instrument measures the ellipsometric parameters δ and ψ by a technique that does not require measurement of either optical phase or intensity. The operating principle of the ellipsometer is described in detail together with brief details of its construction. Its performance is illustrated by reference to specific optical constant measurements made on a variety of materials including thin films and overcoated magneto-optic recording media.

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Section: Instrument Performancesupporting

confidence: 89%

Programmable liquid crystal waveplates in ellipsometric measurements

Carey

Gago‐Sandoval

Newman

et al. 1996

Meas. Sci. Technol.

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“…Perhaps, the data related to the top pinned layer may have come from Faraday (volume) effect [9,10] and that of the bottom free layer from Kerr (surface) effect.…”

Section: Originalmentioning

confidence: 99%

Depth sensitive exchange coupling in top and bottom pinned spin valve structures

Rao

Kumar

Noh

et al. 2007

Physica Status Solidi (b)

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PACS 75.60. Ej, 75.70.Cn Top and bottom pinned spin valve structures have been fabricated using rf magnetron sputtering to study the depth sensitive exchange coupling. M-H curves of both the configurations in as-deposited and annealed forms have been measured by vibration sample magnetometry (VSM) and transverse Kerr effect spectrometry (TKE) using DC and AC magnetic fields, respectively. The TKE signal was also examined as a function of wavelength in the range from 300-800 nm, to obtain data from the full length of the bottom NiFe free layer covering either side of the interface. Annealing of the samples brings in higher values of exchange bias field compared to as-deposited samples perhaps due to improved uniformity in exchange conditions. The TKE data at 500 nm wavelength point towards energetically favourable spin structure at the pinned interface. Wavelength dependence of the TKE data shows an anamolous trend close to the NiFe-Cu (seed layer) inteface, which was attributed to a periodic Cu diffusion assisted non-specular reflection (diffraction) component.

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“…The iron cations are all ferric, and are are located in octahedral 12k, 4f 2 and 2a sites, and tetrahedral 4f 1 sites, in addition to a trigonal bipyramidal 2b site which is understood to be mainly responsible for the c-axis magnetic anisotropy [8], but which has not been well characterized optically. In fact, although optical and magnetooptical spectra of BaFe 12 O 19 have been examined previously in the spectral region extending from the visible to the near infra-red [5,6,9,10], no attempt has been made, to our knowledge, to examine the low-temperature spectral detail in terms of possible assignments of crystal-field transitions to the above optical centres. This paper attempts to rectify this situation by presenting, for the first time, the low-temperature Faraday rotation spectra of BaFe 12 O 19 between 1.5 eV and 2.4 eV, and suggesting assignments of the spectral detail to crystal-field transitions originating from the various Fe 3+ sites.…”

Section: Introductionmentioning

confidence: 99%

An investigation of the low-temperature Faraday rotation spectrum of

Masterson¹,

Lunney²,

Coey³

1997

J. Phys.: Condens. Matter

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The Faraday rotation spectra between 1.5 eV and 2.4 eV are examined for thin films of the hexagonal ferrite , prepared by pulsed laser deposition. Fine spectral detail is observed at 24 K between 1.69 eV and 1.85 eV. A sharp paramagnetic transition at 1.69 eV, with an oscillator strength of , is assigned to the crystal field transition originating on the octahedrally coordinated site. Somewhat weaker diamagnetic transitions above 1.73 eV are tentatively assigned to first-excited-state transitions in the 2b trigonal bipyramidal site. A broader feature with an extremum at 2.23 eV is considered to originate from the transition in tetrahedral sites.

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Magnetooptic Kerr effect and Faraday effect on Ni-Fe alloys

Cited by 3 publications

References 2 publications

Programmable liquid crystal waveplates in ellipsometric measurements

Programmable liquid crystal waveplates in ellipsometric measurements

Depth sensitive exchange coupling in top and bottom pinned spin valve structures

An investigation of the low-temperature Faraday rotation spectrum of

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