Substrate temperature dependence of structure and resistivity of SrRuO<sub>3</sub> thin films grown by pulsed laser deposition on (100) SrTiO<sub>3</sub>

Zakharov, N. D.; Satyalakshmi, K. M.; Koren, G.; Hesse, D.

doi:10.1557/jmr.1999.0593

Cited by 49 publications

(29 citation statements)

References 25 publications

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“…[12][13][14][15][16][17][18][19][20][21][22][23] In addition, there is some information about the early stages of growth in SrRuO 3 films, 14,21 but its correlation with physical properties is still lacking. The microstructure of films at nanometer scale, i.e., close to the interfaces, is closely related to the growth mechanism and may have a significant impact on the electronic properties of the film.…”

Section: Introductionmentioning

confidence: 99%

Enhanced electron-electron correlations in nanometricSrRuO3epitaxial films

et al. 2003

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Epitaxial and fully strained SrRuO 3 thin films have been grown on SrTiO 3 (100). At initial stages the growth mode is three-dimensional-͑3D-͒like, leading to a finger-shaped structure aligned with the substrate steps and that eventually evolves into a 2D step-flow growth. We study the impact that the defect structure associated with this unique growth mode transition has on the electronic properties of the films. Detailed analysis of the transport properties of nanometric films reveals that microstructural disorder promotes a shortening of the carrier mean free path. Remarkably enough, at low temperatures, this results in a reinforcement of quantum corrections to the conductivity as predicted by recent models of disordered, strongly correlated electronic systems. This finding may provide a simple explanation for the commonly observed-in conducting oxidesresistivity minima at low temperature. Simultaneously, the ferromagnetic transition occurring at about 140 K, becomes broader as film thickness decreases down to nanometric range. The relevance of these results for the understanding of the electronic properties of disordered electronic systems and for the technological applications of SrRuO 3 -and other ferromagnetic and metallic oxides-is stressed.

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Section: Introductionmentioning

confidence: 99%

Enhanced electron-electron correlations in nanometricSrRuO3epitaxial films

et al. 2003

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“…The lattice parameters of SRO are similar to those of YBCO 29 , and therefore they can form epitaxial heterostructures with highly transparent interfaces, essential for the existence of AR and the PE. The DWs in SRO are ∼ 3 nm wide, which is comparable to the YBCO coherence length of ξ S ∼ 2 nm, thus allowing the CARE process to occur.…”

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confidence: 99%

Evidence for crossed Andreev reflections in bilayers of (100)YBa2Cu3O7−δand the itinerant ferromagnet
Asulin
¹
,
Yuli
²
,
Koren
³

et al. 2006
Phys. Rev. B
40
1
40
2
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Scanning tunneling spectroscopy measurements on thin epitaxial SrRuO3/(100)Y Ba2Cu3O 7−δ ferromagnet/superconductor bilayers, reveal localized regions in which the superconductor order parameter penetrates the ferromagnet to more than 26 nm, an order of magnitude larger than the coherence length in the ferromagnetic layer. These regions consist of narrow (< 10 nm) and long strips, separated by at least 200 nm, consistent with the known magnetic domain wall structure in SrRuO3. We attributed this behavior to Crossed Andreev Reflections, taking place in the vicinity of the magnetic domain walls. PACS numbers: 74.45.+c, 74.50.+r, 74.87.Bz, In spite of a considerable research effort in the past years, a comprehensive understanding of the proximity effect (PE) in superconductor (S) ferromagnet (F) heterostructures has not yet been established. Such systems are of interest since they allow a direct investigation of the interplay between the two competing orders of superconductivity and magnetism. In an N/S proximity system, where N is a normal metal in good electrical contact with S, superconducting correlations are induced in N over a length scale of the normal coherence length, ξ N , while they are weakened in the S side over a scale of the superconducting coherence length, ξ S 1 . The mechanism underlying the PE at S/N interfaces is the Andreev Reflection (AR). Upon impinging on the interface from the N side, hole-like quasiparticles are retro-reflected as electron-like quasiparticles with inverse spin (maintaining phase coherence over ξ N = hD/k B T where D is the diffusion coefficient), while destroying Cooper pairs in the S side. Consequently, the PE is expected to be significantly suppressed when the N side is replaced by a ferromagnet due to spin polarization 2 . Theoretical works based on the Fulde, Ferrell, Larkin and Ovchinnikov (FFLO) mechanism 3,4 , predict a rapid and nonmonotonic decay of the superconducting order parameter (OP) in F, of the form sin(x/ξ F )/(x/ξ F ) in the clean limit and exp(−x/ξ F )cos(x/ξ F ) in the dirty limit (where x is the distance from the interface) 5,6 . The corresponding coherence lengths in F where the exchange energy is E ex , are ξ F =hv F /2E ex (clean limit) and ξ F = (hD/2E ex ) (dirty limit), which are typically of the order of a few nm, much shorter than ξ N . For certain thicknesses of the F layer a 'π-state' may appear, in which the induced OP in F reverses its sign 5,6 . Many studies confirmed these predictions and clearly demonstrated damped OP oscillations in F and a corresponding dependence on the F thickness of the critical current in SFS junctions 7,8 . All of these effects occur on a length scale of a few nm, in agreement with estimates for ξ F . However, other experiments show a long range PE where the penetration depth of the induced order parameter in F is two orders of magnitude larger than ξ F 9,10 . The predictions concerning the S/F proximity systems result from the singlet pairing in S, and are independent of the symmetry (s-wave or d -wave) of the o...

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“…BFO is an insulator, but it is often subject to high leakage currents [18,19,20]. Indeed, an electrical current can be injected through the BFO layer in the conductive SRO [21], giving rise to a non metallic behaviour of the junction, as expected (Fig. 8).…”

Section: Discussionmentioning

confidence: 60%

Temperature dependence of magnetic and magnetotransport properties in BiFeO₃ thin films by pulsed laser deposition

et al. 2014

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Multiferroic BFO/SRO/Si trilayers have been prepared by pulsed laser deposition in the form of thin films. As a function of the BFO layer thickness, magnetic and magneto-transport properties have been investigated at room temperature and down to 5 K. At low BFO layer thickness, a residual γ-Fe 2 O 3 phase, which interacts interfacially with the SRO and BFO layers, is responsible for moderately hard magnetic properties of the film. On increasing BFO layer thickness, more homogeneous deposits are obtained with uniform magnetic and magnetoresistive properties.

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Substrate temperature dependence of structure and resistivity of SrRuO₃ thin films grown by pulsed laser deposition on (100) SrTiO₃

Cited by 49 publications

References 25 publications

Enhanced electron-electron correlations in nanometricSrRuO3epitaxial films

Enhanced electron-electron correlations in nanometricSrRuO3epitaxial films

Evidence for crossed Andreev reflections in bilayers of (100)YBa2Cu3O7−δand the itinerant ferromagnet
Asulin
¹
,
Yuli
²
,
Koren
³

et al. 2006
Phys. Rev. B
40
1
40
2
View full text Add to dashboard Cite

Temperature dependence of magnetic and magnetotransport properties in BiFeO₃ thin films by pulsed laser deposition

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Substrate temperature dependence of structure and resistivity of SrRuO3 thin films grown by pulsed laser deposition on (100) SrTiO3

Cited by 49 publications

References 25 publications

Enhanced electron-electron correlations in nanometricSrRuO3epitaxial films

Enhanced electron-electron correlations in nanometricSrRuO3epitaxial films

Evidence for crossed Andreev reflections in bilayers of (100)YBa2Cu3O7−δand the itinerant ferromagnetAsulin1, Yuli2, Koren3 et al. 2006Phys. Rev. B401402View full textAdd to dashboardCite

Temperature dependence of magnetic and magnetotransport properties in BiFeO3 thin films by pulsed laser deposition

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Substrate temperature dependence of structure and resistivity of SrRuO₃ thin films grown by pulsed laser deposition on (100) SrTiO₃

Evidence for crossed Andreev reflections in bilayers of (100)YBa2Cu3O7−δand the itinerant ferromagnet
Asulin
¹
,
Yuli
²
,
Koren
³

et al. 2006
Phys. Rev. B
40
1
40
2
View full text Add to dashboard Cite

Temperature dependence of magnetic and magnetotransport properties in BiFeO₃ thin films by pulsed laser deposition