Reversible shift in the superconducting transition for La1.85Sr0.15CuO4and BaFe1.8Co0.2As2using piezoelectric substrates

Trommler, Sascha; Hühne, Ruben; Iida, K.; Pahlke, Patrick; Haindl, S.; Schultz, L.; Holzäpfel, B.

doi:10.1088/1367-2630/12/10/103030

Cited by 32 publications

(26 citation statements)

References 20 publications

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“…It has been shown that superconductivity can be modulated by ferroelectric field effect23 or biaxial strain related to the converse piezoelectric effect of FE4. For biaxial-strain-effect study, substrates with different mismatches with the film have been widely used5678.…”

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confidence: 99%

Quasi-two-dimensional superconductivity in FeSe0.3Te0.7 thin films and electric-field modulation of superconducting transition

Zhu

Mei

Wei

et al. 2015

Sci Rep

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We report the structural and superconducting properties of FeSe0.3Te0.7 (FST) thin films with different thicknesses grown on ferroelectric Pb(Mg1/3Nb2/3)0.7Ti0.3O3 substrates. It was shown that the FST films undergo biaxial tensile strains which are fully relaxed for films with thicknesses above 200 nm. Electrical transport measurements reveal that the ultrathin films exhibit an insulating behavior and superconductivity appears for thicker films with Tc saturated above 200 nm. The current-voltage curves around the superconducting transition follow the Berezinskii-Kosterlitz-Thouless (BKT) transition behavior and the resistance-temperature curves can be described by the Halperin–Nelson relation, revealing quasi-two-dimensional phase fluctuation in FST thin films. The Ginzburg number decreases with increasing film thickness indicating the decrease of the strength of thermal fluctuations. Upon applying electric field to the heterostructure, Tc of FST thin film increases due to the reduction of the tensile strain in FST. This work sheds light on the superconductivity, strain effect as well as electric-field modulation of superconductivity in FST films.

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confidence: 99%

Quasi-two-dimensional superconductivity in FeSe0.3Te0.7 thin films and electric-field modulation of superconducting transition

Zhu

Mei

Wei

et al. 2015

Sci Rep

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“…The PMN-PT substrates were used for the deposition of a 100 nm thick La 1.85 Sr 0.15 CuO 4 film using a CaTiO 3 buffer layer [8]. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…More details on the preparation conditions of the superconducting architecture can be found in Refs. [8] and [9].…”

Section: Methodsmentioning

confidence: 99%

“…These films show a direct correlation between magnetic moment and applied strain, a shift of the ferromagnetic ordering temperature and giant gauge effects [2][3][4][5]. We used these single crystals for the investigation of strain driven effects on thin film superconductors [6][7][8]. These measurements are performed at low temperatures and therefore it is an important requirement to know the effective strain value for this temperature region in order to correlate changes in the electronic properties to the structural parameters.…”

Section: Introductionmentioning

confidence: 99%

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Low temperature performance of Pb(Mg<inf>1/3</inf>Nb<inf>2/3</inf>)<inf>0.72</inf>Ti<inf>0.28</inf>O<inf>3</inf> single crystals mapped by metallic and superconducting thin films

Hühne

Trommler

Pahlke

et al. 2014

2014 Joint IEEE International Symposium on the Applications of Ferroelectric, International Workshop on Acoustic Transduction M

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Pulsed laser deposition was used for the preparation of thin meander shaped platinum strain gauges on piezoelectric single crystalline (001) Pb(Mg 1/3 Nb 2/3 ) 0.72 Ti 0.28 O 3 substrates to study in-situ the temperature dependence of the applied strain in thin films even for small samples. A strong decrease of the strain with temperature was revealed at constant electric fields with a plateau like behavior for temperatures in the range of 100 K. The electrical field induced strain leads to a shift in the superconducting transition temperature of La 1.85 Sr 0.15 CuO 4 . A detailed study of the transition was used to prove a linear and reversible behavior of the strain with the applied electric field.PMN-PT, strain, low temperature behaviour, strain gauge

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“…[1][2][3][4] The strain therefore has become an important parameter for tuning the properties of thin-film systems since films can be grown epitaxially with specific strain states by selecting appropriate substrates. In patterned structures with finite lateral dimensions, the strain state is modified by patterning leading to changes in physical properties compared to a continuous thin film.…”

Section: Introductionmentioning

confidence: 99%

Strain-induced magnetization reorientation in epitaxial Cu/Ni/Cu rings

et al. 2013

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The role of the strain state in epitaxial (001)-oriented Cu/Ni(14 nm)/Cu rings is investigated using a combination of magnetic force microscopy and finite-element calculations. Rings with an external diameter of 3 and 2 μm and linewidth W larger than 400 nm show two different structures: domains with magnetization oriented in the radial direction exist at the inner and outer radius, separated by an area in the interior of the ring consisting of stripe domains with perpendicular magnetization. The former is the sole magnetic structure observed for W < 400 nm. Micromagnetic calculations on narrow-linewidth structures indicate that the radial domain-wall structure consists of elliptical Bloch lines with a shorter and longer length along the tangential and radial directions, respectively. Finite-element calculations show that the anisotropic relaxation of the in-plane strain is larger at the ring inner and outer edges than in the interior part of the ring and accounts for the reorientation of the magnetization direction.

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Reversible shift in the superconducting transition for La_1.85Sr_0.15CuO₄and BaFe_1.8Co_0.2As₂using piezoelectric substrates

Cited by 32 publications

References 20 publications

Quasi-two-dimensional superconductivity in FeSe0.3Te0.7 thin films and electric-field modulation of superconducting transition

Quasi-two-dimensional superconductivity in FeSe0.3Te0.7 thin films and electric-field modulation of superconducting transition

Low temperature performance of Pb(Mg<inf>1/3</inf>Nb<inf>2/3</inf>)<inf>0.72</inf>Ti<inf>0.28</inf>O<inf>3</inf> single crystals mapped by metallic and superconducting thin films

Strain-induced magnetization reorientation in epitaxial Cu/Ni/Cu rings

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