Magnetic and electronic properties of a Pt–Co bilayer on Pt(111)

Giovanelli, Luca; Santis, M. De; Panaccione, G.; Sirotti, Fausto; Torelli, Piero; Vobornik, I.; Larcipretea, R.; Egger, S.; Saint‐Lager, Marie‐Claire; Dolle, P.; Rossi, G.

doi:10.1016/j.jmmm.2004.09.011

Cited by 2 publications

(2 citation statements)

References 37 publications

(56 reference statements)

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“…Such a PtCo surface alloy is ferromagnetic (FM) and displays a strong perpendicular magnetic anisotropy (PMA). A coercivity of 1.2 kOe was observed in situ by XMCD at the Co L edges in a similar system [33]. This PtCo(111) surface alloy was then held at 450 K during the procedure of [NiO/CoO] multilayer deposition, performed as follows.…”

Section: Resultsmentioning

confidence: 94%

“…The coercivity (H C = (H C2 − H C1 )/2) presents a maximum of 1.7 kOe at about 320 K, then decreases monotonically to 1.2 kOe at higher temperatures (Fig.7). It is worth noting that 1.2 kOe is the same value as for the PtCo surface alloy without any capping oxyde [33]. The FM layer preserves its quality and is altered just by the exchange coupling to the AF ordered layer.…”

Section: B Increased Coercivity Exchange Bias and Spin Reorientationmentioning

confidence: 94%

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Structure, morphology and magnetism of an ultra-thin [NiO/CoO]/PtCo bilayer with perpendicular exchange bias

Tolentino¹,

Santis²,

Tonnerre³

et al. 2009

Braz. J. Phys.

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Electronic and magnetic properties of nanoscale materials are closely related to the atomic arrangement at the interface shared by different chemical elements. A very precise knowledge of the surface/interface structure is then essential to properly interpret the new properties coming out. Of a particular interest is the relationship between structure, morphology and magnetic properties of exchanged-coupled interfaces in ferromagnetic (FM) and antiferromagnetic (AF) materials. The interaction at the AF/FM interface modifies the magnetic switching properties of the FM film, which turn out to be a usefull property on new magnetic devices technology. We present here an investigation of the buried exchange-coupled interface [NiO/CoO]/[PtCo] grown on a Pt(111) single crystal. The magneto-optical Kerr effect reveals a strong coupling at the interface, by an increasing coercivity, and a spin reorientation of the FM film when ordering occurs in the AF layer. The combination of grazing incidence X-ray diffraction, X-ray reflectivity and soft X-ray resonant magnetic scattering yields a comprehensive description of the system.

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Section: Resultsmentioning

confidence: 94%

Section: B Increased Coercivity Exchange Bias and Spin Reorientationmentioning

confidence: 94%

Structure, morphology and magnetism of an ultra-thin [NiO/CoO]/PtCo bilayer with perpendicular exchange bias

Tolentino¹,

Santis²,

Tonnerre³

et al. 2009

Braz. J. Phys.

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Depth Magnetization Profile of a Perpendicular Exchange Coupled System by Soft-X-Ray Resonant Magnetic Reflectivity

et al. 2008

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The magnetic profile across the interface of a perpendicular exchange coupled [NiO/CoO]3/Pt-Co/Pt(111) system is investigated. The magneto-optic Kerr effect reveals a strong coupling between the antiferromagnetic (AFM) oxide and the ferromagnetic (FM) Pt-Co layer, by an increasing coercivity and a rotation of the easy magnetization axis of the FM layer along the AFM spins. Soft x-ray resonant magnetic reflectivity is used to probe the spatial distribution of the out-of-plane magnetization inside the oxide above its ordering temperature. It extends over 1 nm and exhibits a change of sign.

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Magnetic and electronic properties of a Pt–Co bilayer on Pt(111)

Cited by 2 publications

References 37 publications

Structure, morphology and magnetism of an ultra-thin [NiO/CoO]/PtCo bilayer with perpendicular exchange bias

Structure, morphology and magnetism of an ultra-thin [NiO/CoO]/PtCo bilayer with perpendicular exchange bias

Depth Magnetization Profile of a Perpendicular Exchange Coupled System by Soft-X-Ray Resonant Magnetic Reflectivity

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