Epitaxial growth of Co/Cu(001) superlattices on sapphire substrates

Nunzio, S. Di; Theis‐Bröhl, Katharina; Zabel, H.

doi:10.1016/0040-6090(95)08197-6

Cited by 13 publications

(6 citation statements)

References 30 publications

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“…In agreement with the observation by RHEED ( Fig. 4 ) we observed that the Nb(200) peak is tilted off-specular by a few degrees, which is a well-known feature of Nb growth on Al 2 O 3 ( ) substrates [ 45 – 46 ]. Similar patterns were measured for all samples, except for sample s6, which was grown at room temperature.…”

Section: Resultssupporting

confidence: 91%

“…Nb deposition at 800 °C results in a streaky pattern and a Laue ring (Figure 2c) revealing epitaxial growth in agreement with previous results [43][44][45][46]. In particular, the epitaxial Nb growth of (100) orientation on Al 2 O 3 ( ) substrates was reported in [46]. The peculiarity of this growth, also seen in our samples, is an angle of approx.…”

Section: Growth Analysis With Rheedsupporting

confidence: 92%

“…Together with two reflections from the substrate we observed a Nb(200) peak at 2θ = 55°with mosaicity of the same order as the substrate peak. In agreement with the observation by RHEED ( Figure 4b) we observed that the Nb(200) peak is tilted off-specular by a few degrees, which is a well-known feature of Nb growth on Al 2 O 3 ( ) substrates [45,46]. Similar patterns were measured for all samples, except for sample s6, which was grown at room temperature.…”

Section: Growth Analysis With Rheedsupporting

confidence: 90%

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Proximity effect in [Nb(1.5 nm)/Fe(x)]₁₀/Nb(50 nm) superconductor/ferromagnet heterostructures

Khaydukov¹,

Pütter²,

Guasco³

et al. 2020

Beilstein J. Nanotechnol.

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We have investigated the structural, magnetic and superconduction properties of [Nb(1.5 nm)/Fe(x)]10 superlattices deposited on a thick Nb(50 nm) layer. Our investigation showed that the Nb(50 nm) layer grows epitaxially at 800 °C on the Al2O3(1−102) substrate. Samples grown at this condition possess a high residual resistivity ratio of 15–20. By using neutron reflectometry we show that Fe/Nb superlattices with x < 4 nm form a depth-modulated FeNb alloy with concentration of iron varying between 60% and 90%. This alloy has weak ferromagnetic properties. The proximity of this weak ferromagnetic layer to a thick superconductor leads to an intermediate phase that is characterized by a suppressed but still finite resistance of structure in a temperature interval of about 1 K below the superconducting transition of thick Nb. By increasing the thickness of the Fe layer to x = 4 nm the intermediate phase disappears. We attribute the intermediate state to proximity induced non-homogeneous superconductivity in the structure.

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Section: Resultssupporting

confidence: 91%

Section: Growth Analysis With Rheedsupporting

confidence: 92%

Section: Growth Analysis With Rheedsupporting

confidence: 90%

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Proximity effect in [Nb(1.5 nm)/Fe(x)]₁₀/Nb(50 nm) superconductor/ferromagnet heterostructures

Khaydukov¹,

Pütter²,

Guasco³

et al. 2020

Beilstein J. Nanotechnol.

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“…In agreement with the observation by RHEED (Fig. 4b) we observed that the Nb(200) peak is tilted off-specular a couple of degrees which is a well-known feature of Nb growth on Al 2 O 3 (1 102) substrates [31,32]. Similar patterns were measured for all samples, except for sample s6 which was grown at room temperature.…”

Section: X-ray Diffractionsupporting

confidence: 91%

Proximity effect in [Nb(1.5nm)/Fe(x)]$_{10}$/Nb(50nm) superconducting/ferromagnet heterostructures

Khaydukov,

Pütter,

Guasco

et al. 2019

Preprint

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We have investigated the structural, magnetic and superconducting properties of [Nb(1.5nm)/Fe(x)]10 superlattices deposited on a thick Nb(50nm) layer.Our investigation showed that the Nb(50nm) layer grows epitaxially at 800 • C on Al2O3(1 102) substrate. Samples grown at this condition posses a high residual resistivity ratio of 15-20. By using neutron reflectometry we show that Fe/Nb superlattices with x < 4 nm form a depth-modulated FeNb alloy with concentration of iron varying between 60% and 90%. This alloy has properties of a weak ferromagnet. Proximity of this weak ferromagnetic layer to a thick superconductor leads to an intermediate phase that is characterized by co-existing superconducting and normal-state domains. By increasing the thickness of the Fe layer to x = 4 nm the intermediate phase disappears. We attribute the intermediate state to proximity induced non-homogeneous superconductivity in the periodic Fe/Nb structure.

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“…[9][10][11][12][13] Epitaxial Nb films are often used as a buffer layer for controllable growth of rare-earth films, [14,15] exchange biased, [16] and GMR systems. [17] Thus, the controlled growth of niobium films with a given crystal orientation and high quality of the layer and surface is an important task for many areas of science and technology.…”

Section: Introductionmentioning

confidence: 99%

Tuning Epitaxial Growth of Nb on MgO(100)

Guasco

Montañez

Khaydukov

et al. 2023

Advanced Physics Research

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Niobium thin films are central to many applications, such as superconducting radio‐frequency cavities and superconducting qubits, due to its relatively high superconducting temperature and easiness to form heterostructures. However, literature on epitaxial growth of Nb on one of the most commonly used substrates, that is MgO, reports contradicting results. In the present parametric study, a coherent picture of how the crystalline orientation and the film morphology depend on the growth parameters is presented. The effects of growth parameters such as growth temperature, growth rate, deposition technique, and surface quality on the transport properties of the superconductor are discussed. In light of the new findings, an overview on previously published results and proposed nucleation and growth mechanisms is also given.

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Epitaxial growth of Co/Cu(001) superlattices on sapphire substrates

Cited by 13 publications

References 30 publications

Proximity effect in [Nb(1.5 nm)/Fe(x)]₁₀/Nb(50 nm) superconductor/ferromagnet heterostructures

Proximity effect in [Nb(1.5 nm)/Fe(x)]₁₀/Nb(50 nm) superconductor/ferromagnet heterostructures

Proximity effect in [Nb(1.5nm)/Fe(x)]$_{10}$/Nb(50nm) superconducting/ferromagnet heterostructures

Tuning Epitaxial Growth of Nb on MgO(100)

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Epitaxial growth of Co/Cu(001) superlattices on sapphire substrates

Cited by 13 publications

References 30 publications

Proximity effect in [Nb(1.5 nm)/Fe(x)]10/Nb(50 nm) superconductor/ferromagnet heterostructures

Proximity effect in [Nb(1.5 nm)/Fe(x)]10/Nb(50 nm) superconductor/ferromagnet heterostructures

Proximity effect in [Nb(1.5nm)/Fe(x)]$_{10}$/Nb(50nm) superconducting/ferromagnet heterostructures

Tuning Epitaxial Growth of Nb on MgO(100)

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Product

Resources

About

Proximity effect in [Nb(1.5 nm)/Fe(x)]₁₀/Nb(50 nm) superconductor/ferromagnet heterostructures

Proximity effect in [Nb(1.5 nm)/Fe(x)]₁₀/Nb(50 nm) superconductor/ferromagnet heterostructures