Magnetic Moment in the Top Pt Layer of CoPt Bilayers

Suzuki, Motohiro; Miyagawa, Hayato; Kawamura, N.; Muraoka, H.; Inaba, Y.; Shimatsu, T.; Sonobe, Y.; Isohama, Yoichi; Nakamura, Noboru; Ishimatsu, Naoki; Maruyama, Hiroshi

doi:10.1238/physica.topical.115a00580

Cited by 24 publications

(34 citation statements)

References 2 publications

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“…The polarization of Pt when in contact with magnetic materials at Co/ Pt interfaces has been widely investigated by means of XMCD, 6 Kerr spectroscopy, 23,24 and ab initio calculations. 24,25 Polarization of the Pt atoms in contact with a Co surface is due to the hybridization of the Co 3d and Pt 5d orbitals.…”

Section: A Macroscopic Magnetic Propertiesmentioning

confidence: 99%

“…24,25 Polarization of the Pt atoms in contact with a Co surface is due to the hybridization of the Co 3d and Pt 5d orbitals. Suzuki et al 6 measured a magnetic moment per atom of 0.61 B for the Pt atoms at the interface, decreasing exponentially with the distance to the interface such that the first four atomic layers contain 90% of the total Pt magnetization. In addition, it has been found an increase of the perpendicular Co orbital moment localized at the Co/ Pt interface, giving rise to perpendicular magnetic anisotropy.…”

Section: A Macroscopic Magnetic Propertiesmentioning

confidence: 99%

“…As previously mentioned, Pt polarization at the Co/ Pt interface decreases exponentially with the distance, in such a way that the first four atomic layers contain 90% of the Pt magnetization. 6 In this case, as in previous work, 7 we considered a 3.5 atomic layers thick ͑ϳ7 Å͒ polarized Pt film at the Co/ Pt interface, with a constant magnetic moment throughout its entire thickness. 7,8 Adding this polarized Pt film and using the matrix transfer formalism, it was possible to extract the MO constant of polarized Pt from the rotation and ellipticity spectra of the above mentioned sample, and they are shown in Fig.…”

Section: Morphology and Capping Effects In The Magneto-optical Acmentioning

confidence: 99%

“…7 Thus, the capping layer is not only a key factor to preserve the stability of the magnetic system but also influences the magnetic response through hybridization with the 3d orbitals of the transition metals. 6 This makes it important to study changes in the magnetic properties of nanoparticles due to coating with different materials. 8 In this paper, we report the effect of three metal capping layers with different tendencies for induced magnetic polarization.…”

Section: Introductionmentioning

confidence: 99%

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Morphology and capping effects in the magnetic and magneto-optical properties of nanoparticulate Co films

et al. 2008

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Magnetic and magneto-optical properties of Co films are studied as a function of the morphology and the capping layer. We show that the nanoparticulate structure of the Co films has a clear influence on the magnetic and magneto-optical properties of the system. Kerr measurements combined with x-ray magnetic circular dichroism provide evidence of a strong correlation between the collective magnetic behavior of the system and the individual atomic magnetic response. The influence of the magnetic nature of the capping layer ͑Al, Au, and Pt͒ is also analyzed. Polarized capping layers, such as Pt, magnetically couple the nanostructures and not only increase the effective anisotropy of the system but also enhance the atomic magnetic moment of Co and the global magneto-optical activity.

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Section: A Macroscopic Magnetic Propertiesmentioning

confidence: 99%

Section: A Macroscopic Magnetic Propertiesmentioning

confidence: 99%

Section: Morphology and Capping Effects In The Magneto-optical Acmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Morphology and capping effects in the magnetic and magneto-optical properties of nanoparticulate Co films

et al. 2008

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“…Despite a study about induced paramagnetism on gold [1], bulk gold (Z= 79; electron configuration [xe] 4f 14 5d 10 6s 1 ) is known to be a typical diamagnetic material. Magnetic properties of gold nanoparticles and clusters have been reported [2].…”

Section: Introductionmentioning

confidence: 99%