Magnetic properties of PdNi alloys and multilayers

Takahashi, Hirokazu; Tsunashima, S.; Fukatsu, S.; Uchiyama, Susumu

doi:10.1016/0304-8853(91)90386-o

Cited by 19 publications

(7 citation statements)

References 6 publications

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“…However, since the magnetization easy axis is also influenced by surface, interface, and volume elastic strains of the films, magnetic thin films and multilayers often exhibit PMA. [7][8][9][10] Moreover, surface modifications of magnetic thin films such as adsorption of molecules and metals sometime induce drastic transitions of the change in the magnetization easy axis, [11][12][13] known as a spin reorientation transition ͑SRT͒.…”

Section: Introductionmentioning

confidence: 99%

Spin reorientation transitions of Ni/Pd(111) films induced by Fe deposition

et al. 2010

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Two opposite spin reorientation transitions ͑SRTs͒ of Ni/Pd͑111͒ films induced by Fe-capping layers have been investigated in situ by low-energy electron diffraction, magneto-optical Kerr effect, and x-ray magnetic circular dichroism ͑XMCD͒. In pure Ni films grown on Pd͑111͒, no thickness-driven SRT was observed, leaving the magnetization easy axis in plane. Deposition of Fe 1 monolayer ͑ML͒ on Ni͑6 ML͒/Pd͑111͒ causes a transition to perpendicular magnetization, and further Fe 3 ML deposition leads to a return to in-plane magnetization. The XMCD results confirm a contribution of the orbital magnetic moment of a single Fe layer to the first SRT, which gives a significant impact on the Fe-Ni interface that stabilizes perpendicular magnetic anisotropy ͑PMA͒. The second SRT coincides with the structural change in the Fe film from the fcc to bcc phase, where the reduction in the orbital magnetic moment along the perpendicular direction to suppress the PMA stability was observed. It can be proposed that the origin of the second SRT to in-plane magnetization is attributed to cooperative contributions of the structural transformation of the Fe film and the enhanced demagnetizing field.

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Section: Introductionmentioning

confidence: 99%

Spin reorientation transitions of Ni/Pd(111) films induced by Fe deposition

et al. 2010

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“…Co/Pt multiayers have been studied intensely in the recent years because they are potential candidates for very high density magneto-optical recording in short wave length region [1,2,3]. Samples with Co layer thickness in the range 4 to 5 A show square perpendicular loop with interesting properties.…”

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confidence: 99%

MAGNETIC AND MAGNETO-OPTIC PROPERTIES OF TERNARY Co/Pt/Ni/Pt MULTILAYERS

Krishnan¹,

Das²,

Keller³

et al. 1998

J. Magn. Soc. Jpn.

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CoIPtlNilPtl multi layers have been prepared by rf sputtering to study the effect of Ni layer thickness on the magnetic and magneto-optical properties. The magnetization and the Faraday rotation have been interpreted in terms of the properties of Ni layers in Ni/Pt and a good agreement is obtained. The squareness of the loop of Co 5 A/Pt 15 A increases form 0.7 to 1.0 with the addition of very thin Ni layers (:S 5 A). For Ni layers thinner than about 10 A, the effective anisotropy increases due to the contributions from the surface anisotropy in thin Ni layers and the reduction in 2.i"tM2. For thicker Ni layers this surface anisotropy is negligible and hence the loop shows in-plane character. In Ni/Pt multilayers, Ni layers thinner than lOA are non magnetic at room temperature, but in the present system exchange coupling from Co layers lead to an relative increase in the Curie temperature.

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“…However, Shin et al 11 has observed room-temperature PMA in Ni/Pt multilayers and stress-induced magnetoelastic anisotropy was claimed to be a major origin for the observed PMA in this system, 12 in contrast with the interfacial origins of PMA found in Co-or Fe-based multilayer systems. While, Flevaris 13 has reported that a perpendicular anisotropy component, determined from the polar Kerr hysteresis loop, was developed for a very thin Ni sublayers in Ni/Pd multilayers and Takahashi et al 14 has observed PMA in Ni/Pd multilayers prepared at high Ar sputtering pressure of 25 mTorr. The purpose of this letter is to report the experimental observation of room-temperature PMA with a squared Kerr hysteresis loop in Ni/Pd multilayer films and to clarify the origins of the observed PMA in this system.…”

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confidence: 99%

“…These loops are marked different compared with earlier works. 13,14 Different sample preparation method could result in the difference of the Kerr hysteresis loop, since the microstructure of films could strongly depend on the film preparation method. Our sample preparation method ͑sputtering͒ and substrate ͑glass͒ are different from those ͑e-beam evaporation and heated mica substrate͒ of Flevaris' work.…”

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Room-temperature perpendicular magnetic anisotropy in Ni/Pd (111) multilayers

Jeong

Shin

1999

Applied Physics Letters

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We report the experimental observation of room-temperature perpendicular magnetic anisotropy ͑PMA͒ in Ni/Pd ͑111͒ multilayer films having the thickness range of 5-11 Å Ni and 4-11 Å Pd sublayers, prepared by direct current magnetron sputtering on glass substrates at Ar sputtering pressure of 7 mTorr. Perpendicular magnetic anisotropy was found to be sensitively dependent on both Ni-and Pd-sublayer thicknesses, and a maximum anisotropy energy of 5.6ϫ10 5 erg/cm 3 was obtained for the ͑5 Å Ni/6 Å Pd͒ 30 multilayer. The magnetoelastic anisotropy, quantitatively determined from in situ stress and ex situ magnetostriction coefficient measurements, was found to play an important role for the observed PMA in this system, together with the surface anisotropy.

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Magnetic properties of PdNi alloys and multilayers

Cited by 19 publications

References 6 publications

Spin reorientation transitions of Ni/Pd(111) films induced by Fe deposition

Spin reorientation transitions of Ni/Pd(111) films induced by Fe deposition

MAGNETIC AND MAGNETO-OPTIC PROPERTIES OF TERNARY Co/Pt/Ni/Pt MULTILAYERS

Room-temperature perpendicular magnetic anisotropy in Ni/Pd (111) multilayers

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