Transport measurements on microcrystals of oriented CeIn3 and CeCoIn5 thin films

Foyevtsov, Oleksandr; Reith, Heiko; Huth, Michael

doi:10.1016/j.tsf.2010.06.028

Cited by 4 publications

(14 citation statements)

References 21 publications

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“…Best results were obtained for a substrate temperature of 500°C, 40 W dc sputtering power at each CeIn 3 target and 350 W dc sputtering power of indium, and an argon gas pressure of 3 × 10 −2 mbar. Under these conditions the film growth rate was 30 Å/s, i.e., ∼30 times higher than of the MBE-prepared CeIn 3 films [6]. No post-deposition treatment was performed.…”

Section: Sample Preparation and Characterizationmentioning

confidence: 93%

“…CeIn 3 thin films have become of increasing interest as well [5,6]. The recent report of a dimensional crossover of the heavy-fermion behavior in CeIn 3 /LaIn 3 superlattices as a function of thickness of CeIn 3 layers separated by LaIn 3 layers [7] has sparked this interest.…”

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confidence: 99%

“…However, the growth of high-quality CeIn 3 films of reasonably large area turned out to be quite challenging. Although films grown by molecular-beam epitaxy (MBE) contained high-quality CeIn 3 crystallites, these films were not continuous [5,6]. A possible reason is the de-wetting of indium on a heated substrate, which leads to the distinct island-type growth of CeIn 3 films (so-called Volmer-Weber growth [8]).…”

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confidence: 99%

“…A possible reason is the de-wetting of indium on a heated substrate, which leads to the distinct island-type growth of CeIn 3 films (so-called Volmer-Weber growth [8]). By optimizing the MBE process, Foyetsov and Huth were able to stabilize a surface morphology consisting of either well-isolated micron-sized CeIn 3 islands [5], or of micron-sized CeIn 3 islands interconnected by metallic indium [6].…”

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confidence: 99%

“…[9], and for indium-based compounds, e.g., CeCoIn 5 [6,10] which is a material closely related to CeIn 3 with CeIn 3 layers separated by CoIn 2 layers [11]. For both indium and CeCoIn 5 , formation of a continuous film at a given substrate temperature was favored by higher film deposition rates [9,12].…”

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confidence: 99%

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Characterization and Low-Temperature Resistivity of Thin CeIn3 Films Prepared by Co-sputtering

et al. 2012

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Thin films of the heavy-fermion system CeIn 3 were prepared by simultaneous dc sputtering of two stoichiometric CeIn 3 targets and dc magnetron sputtering of a pure indium target in argon gas. The films were grown at a high rate of ∼30 Å/s on 10 × 20 mm 2 r-cut sapphire substrates heated to 500°C. The resultant 120-nm thick films were continuous and stoichiometric, although indium precipitates of 1 µm size were observed on the surface. The films exhibited the expected cubic structure with the lattice parameter of 4.692 Å. They were predominantly (111) oriented, with minor amounts of (100) and (110) oriented grains. The dependence of the electrical resistivity on temperature, ρ(T ), is typically that of bulk CeIn 3 with a clear maximum at around 50 K, followed by a linear decrease towards lower temperatures. At 10 K a kink in ρ(T ) indicates the antiferromagnetic ordering of CeIn 3 . The temperature dependence of the resistivity between 1.2 and 10 K is discussed in terms of electron-electron and electron-magnon scattering.

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confidence: 93%

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confidence: 99%

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Characterization and Low-Temperature Resistivity of Thin CeIn3 Films Prepared by Co-sputtering

et al. 2012

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Josephson effect in a CeCoIn5 microbridge

Foyevtsov

Porrati

Huth

2012

Physica C: Superconductivity

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We report DC Josephson effects observed in a microbridge prepared from an individual crystalline growth domain of CeCoIn 5 thin film. Josephson effects were observed by periodic voltage modulations under external magnetic field ∆V (B) with the expected periodicity and by the temperature dependence of the Josephson critical current I c (T ). The shape of ∆V (B) was found to be asymmetric, as it is expected for microbridges. The dependence I c (T ) follows the Ambegaokar-Baratoff relation, which is unexpected for microbridges. Features in the dynamical resistance curves were attributed to the periodic motion of Abricosov vortices within the microbridge.

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Study on superconducting properties of CeIrIn₅ thin films grown via pulsed laser deposition

Kang¹,

Kim²,

Park³

et al. 2022

J. Phys.: Condens. Matter

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We report the growth of high-quality CeIrIn5 thin films with different crystal orientations on a MgF2 (001) substrate using pulsed laser deposition technique. X-ray diffraction analysis showed that the thin films were either mainly a-axis-oriented (TF1) or a combination of a- and c-axis-oriented (TF2). The characteristic features of heavy-fermion superconductors, i.e. Kondo coherence and superconductivity, were clearly observed, where the superconducting transition temperature (Tc) and Kondo coherence temperature (Tcoh) are 0.58 K and 41 K for TF1 and 0.52 K and 37 K for TF2, respectively. The temperature dependencies of the upper critical field (Hc2) of both thin films and the CeIrIn5 single crystal revealed a scaling behavior, indicating that the nature of unconventional superconductivity has not been changed in the thin film. The successful synthesis of CeIrIn5 thin films is expected to open a new avenue for novel quantum phases that may have been difficult to explore in the bulk crystalline samples.

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Transport measurements on microcrystals of oriented CeIn3 and CeCoIn5 thin films

Cited by 4 publications

References 21 publications

Characterization and Low-Temperature Resistivity of Thin CeIn3 Films Prepared by Co-sputtering

Characterization and Low-Temperature Resistivity of Thin CeIn3 Films Prepared by Co-sputtering

Josephson effect in a CeCoIn5 microbridge

Study on superconducting properties of CeIrIn₅ thin films grown via pulsed laser deposition

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Transport measurements on microcrystals of oriented CeIn3 and CeCoIn5 thin films

Cited by 4 publications

References 21 publications

Characterization and Low-Temperature Resistivity of Thin CeIn3 Films Prepared by Co-sputtering

Characterization and Low-Temperature Resistivity of Thin CeIn3 Films Prepared by Co-sputtering

Josephson effect in a CeCoIn5 microbridge

Study on superconducting properties of CeIrIn5 thin films grown via pulsed laser deposition

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Study on superconducting properties of CeIrIn₅ thin films grown via pulsed laser deposition