Spectroscopy of multilayers for magneto-optic storage

Weller, D.; Reim, W.; Spörl, K.; Brändle, H.

doi:10.1016/0304-8853(91)90328-8

Cited by 118 publications

(45 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] Both Co-based and Fe-based magnetic multilayers show good blue responses which are important for higher density magneto-optical recording. [4][5][6][7][8][9][10] Large Kerr responses in the blue were believed to be related to the presence of the transition metal ͑especially Pt and Pd͒ in the interfacial region. This can be easily observed by comparing Kerr spectra for Co/Pt multilayers to a Kerr spectrum for a single Co layer.…”

Section: Introductionmentioning

confidence: 99%

“…This can be easily observed by comparing Kerr spectra for Co/Pt multilayers to a Kerr spectrum for a single Co layer. 7 The comparison in Ref. 7 shows that when the Pt layer decreases below a certain thickness, the Kerr response in the blue range is larger for the multilayers than for a single Co layer; however, it is smaller for the multilayers in the red range.…”

Section: Introductionmentioning

confidence: 99%

“…7 The comparison in Ref. 7 shows that when the Pt layer decreases below a certain thickness, the Kerr response in the blue range is larger for the multilayers than for a single Co layer; however, it is smaller for the multilayers in the red range. Ab initio calculations have been used to calculate the moments of both magnetic atoms and transition metal atoms with the spin-orbit interaction included in the calculations.…”

Section: Introductionmentioning

confidence: 99%

“…9,[14][15][16] The Kerr spectra were also simulated by treating the individual layers separately within the framework of multilayer structures. 7,17,18 In the simulations in Ref. 7, spin-polarized Pt ͑or Pd͒ layers were included between the unpolarized Pt ͑or Pd͒ layer and the magnetic Co layer.…”

Section: Introductionmentioning

confidence: 99%

“…7,17,18 In the simulations in Ref. 7, spin-polarized Pt ͑or Pd͒ layers were included between the unpolarized Pt ͑or Pd͒ layer and the magnetic Co layer. Tabulated optical constants were used for the diagonal part of the dielectric tensor for the polarized Pt ͑or Pd͒ layers and the Co layers, as well as for the unpolarized Pt ͑or Pd͒ layers.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Dielectric tensor for interfaces and individual layers in magnetic multilayer structures

Gao

DeVries

Thompson

et al. 2000

Journal of Applied Physics

View full text Add to dashboard Cite

The magneto-optical Kerr response of metallic magnetic multilayers has been studied by determining the dielectric tensors ͑dielectric functions͒ for individual layers, including the magnetic and nonmagnetic interfacial layers. The diagonal components of these tensors were determined using in situ ellipsometric analysis, where the ellipsometric data were taken in real time during multilayer deposition. The off-diagonal components were determined by regression fitting magneto-optic polar Kerr rotation and ellipticity data to models supported by electromagnetic theory. The Voigt parameters ͑ratio between off-diagonal and diagonal components of dielectric tensors͒ were determined from these model fits. Higher magnitudes for the Voigt parameters were found at interfaces, corresponding with stronger Kerr responses observed in those materials. Five different magnetic multilayer systems were studied, including Pt/Co, Pd/Co, Au/Co, Cu/Co, and Pt/Fe multilayer structures. The Voigt parameters for the magnetic layers and magneticnonmagnetic interfaces in all five structures were determined, and in turn the dielectric tensors for the respective layers were also determined.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Dielectric tensor for interfaces and individual layers in magnetic multilayer structures

Gao

DeVries

Thompson

et al. 2000

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

Interface Structure Effects on the Kerr Rotation in Co/Pt Multilayers

Tang

Chen

et al. 2000

phys. stat. sol. (a)

View full text Add to dashboard Cite

The interface structure and magneto-optical properties of Co/Pt multilayers were studied. An unusual increase of the Kerr rotation with increasing Pt thickness was found for a Pt thickness less than 0.72 nm. Through small-and large-angle X-ray diffraction analyses, we suggest that this enhancement of Kerr rotation may be due to the intermixing of Pt and Co atoms at the interface, which causes a larger population of the polarized Pt spins in the system.

show abstract

Temperature-Dependent Magnetizations and Anisotropies in Pd?Ni Multilayers

Papaioannou

Poulopoulos

Angelakeris

et al. 2002

phys. stat. sol. (a)

View full text Add to dashboard Cite

We present Vibrating Sample Magnetometer measurements on Pd-Ni multilayers in the temperature range between 40 and 300 K. The samples were grown on mica and are fcc polycrystalline ones with a strong texture along (111). The individual Pd and Ni layer thicknesses are optimized in order to have maximum perpendicular magnetic anisotropy. We investigate the variation of the anisotropies as a function of temperature for the sample Pd 4 -Ni 2 that shows the optimum anisotropy. Strongly enhanced magnetization by 50-70% per Ni volume at low temperatures is observed. The temperature dependence of the magnetization is influenced by both, the finite thickness of the Ni layers and the thickness of the Pd layers through the variation of the interlayer coupling.Introduction Pd-based multilayers have received considerable attention since the discovery of perpendicular magnetic anisotropy (PMA) in Pd m -Co n multilayers [1] (m, n are numbers of atomic layers in the multilayer period). The most intensive research was focused on Pd-Co multilayers due to their enhanced magneto-optic response [2]. Moreover, multilayers with ultrathin Ni-layers are also of importance since they offer the possibility to bring the Curie temperature (T C ) slightly above the room temperature, which is required for technological applications. Pd-Ni multilayers were studied with focus to their structural and magneto-optic properties at room temperature [3,4]. Preliminary magnetic measurements at room temperature have revealed PMA only for n ¼ 2 [5]. Antiferromagnetic-like coupling evidence was found for n ¼ 6 [6,7]. In this work, the optimum m and n numbers for PMA are determined and the influence of the Pd thickness m on the anisotropy is examined. For the sample Pd 4 -Ni 2 , which is presenting the largest PMA, temperature-dependent anisotropies and magnetizations are discussed. Finally, we study the influence of m and n on the decrease of magnetization of Pd-Ni multilayers, as T C is approached.

show abstract

Spectroscopy of multilayers for magneto-optic storage

Cited by 118 publications

References 30 publications

Dielectric tensor for interfaces and individual layers in magnetic multilayer structures

Dielectric tensor for interfaces and individual layers in magnetic multilayer structures

Interface Structure Effects on the Kerr Rotation in Co/Pt Multilayers

Temperature-Dependent Magnetizations and Anisotropies in Pd?Ni Multilayers

Contact Info

Product

Resources

About