Anomalous behaviour of the Curie temperature of Au-Ni-Au sandwiches at ultra-low Ni thickness

Chappert, C.; Renard, D.; Beauvillain, P.; Renard, Jean‐Pierre

doi:10.1051/jphyslet:0198500460205900

Cited by 12 publications

(2 citation statements)

References 21 publications

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“…The growth and study of Au/Co/Au trilayers became of interest during the 1980s and 1990s due to the observation of interfacial magnetic anisotropies, giant magneto-resistance and novel MO phenomena. Among these reports are several works that concentrated on fundamental magnetic properties [11,12], the crystalline structure [13,14] and the interface roughness and its dependence on Co layer thickness [15] in (1 1 1) textured Au/Co/Au trilayers deposited on glass.…”

Section: Introductionmentioning

confidence: 99%

Optimizing the planar structure of (1 1 1) Au/Co/Au trilayers

Kumah¹,

Cebollada²,

Clavero³

et al. 2007

J. Phys. D: Appl. Phys.

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Au/Co/Au trilayers are interesting for a range of applications which exploit their unusual optical and electronic transport behaviour in a magnetic field. Here we present a comprehensive structural and morphological study of a series of trilayers with 0-7 nm Co layer thickness fabricated on glass by ultrahigh vacuum vapour deposition. We use a combination of in situ electron diffraction, atomic force microscopy and x-ray scattering to determine the optimum deposition conditions for highly textured, flat and continuous layered structures. The 16 nm Au-on-glass buffer layer, deposited at ambient temperature, is found to develop a smooth (1 1 1) texture on annealing at 350 • C for 10 min. Subsequent growth of the Co layer at 150 • C produces a (1 1 1) textured film with lateral grain size of ∼150 nm in the 7 nm-thick Co layer. A simultaneous in-plane and out-of-plane Co lattice expansion is observed for the thinnest Co layers, converging to bulk values for the thickest films. The roughness of the Co layer is similar to that of the Au buffer layer, indicative of conformal growth. The 6 nm Au capping layer smoothens the trilayer surface, resulting in a surface roughness independent of the Co layer thickness.

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Section: Introductionmentioning

confidence: 99%

Optimizing the planar structure of (1 1 1) Au/Co/Au trilayers

Kumah¹,

Cebollada²,

Clavero³

et al. 2007

J. Phys. D: Appl. Phys.

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“…The Curie temperatures of Fe, Co, Ni thin films sandwiched between layers of Au have been deduced, in particular, from magnetization measurements with a SQUID magnetometer [21] or using magnetooptic Kerr effect [22]. The Curie temperature in nickel is not significantly reduced with respect to the bulk in films thicker than about 15 Å, but it decreases rapidly below this value.…”

Section: Ordering Temperatures In Thin Filmsmentioning

confidence: 99%

Magnetism in Rare-Earth-Transition Metal Systems. Magnetization Reversal and Ultra-High Susceptibility in Sandwiched Thin Films Based on Rare-earth and Cobalt Alloys

Baczewski¹,

Givord²,

Alameda³

et al. 1993

Acta Phys. Pol. A

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This paper is composed of two parts: theoretical and experimental. The theoretical part is divided into several sections. The main characteristic properties of 3d (transition metals) and 4f (rare-earth metals) magnetism are explained in the second section. The properties of rare-earth-transition metal compounds are discussed in the third section, particularly with respect to applications. The fourth section is devoted to the rapidly growing field of magnetic thin films. Specifrc properties of ultra-thin films and multilayers are summarized. In the experimental part the original magnetic properties of sandwich films, consisting of a soft amorphous Co-Zr layer placed between two Sm-Co layers with different coercivities, are reported.

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Ferromagnetic Metallic Multilayers: From Elementary Sandwiches to Superlattices

Renard

1987

Thin Film Growth Techniques for Low-Dimensional Structures

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Anomalous behaviour of the Curie temperature of Au-Ni-Au sandwiches at ultra-low Ni thickness

Cited by 12 publications

References 21 publications

Optimizing the planar structure of (1 1 1) Au/Co/Au trilayers

Optimizing the planar structure of (1 1 1) Au/Co/Au trilayers

Magnetism in Rare-Earth-Transition Metal Systems. Magnetization Reversal and Ultra-High Susceptibility in Sandwiched Thin Films Based on Rare-earth and Cobalt Alloys

Ferromagnetic Metallic Multilayers: From Elementary Sandwiches to Superlattices

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